Determination of Copolymer Block-Length Distributions Using Fragmentation Data Obtained from Tandem Mass Spectrometry

<p><strong>This study introduces a forensic laboratory module designed to quantify environmental tobacco smoke (ETS) exposure in human hair. Using controlled smoke exposure and analysis by UV–Vis spectroscopy, FTIR spectroscopy, and zeta potential measurements, students investigated how untreated, dyed, and bleached hair differ in their capacity to adsorb ETS residues.</strong></p><p>Implemented over three weeks, the module included pre- and postlab assessments to evaluate learning outcomes. Results showed measurable improvements in student understanding, technical skills, and application of forensic analytical techniques. The experiment provides a practical teaching tool for forensic chemistry while demonstrating how chemical treatments influence hair’s interaction with environmental contaminants.</p><blockquote><h4><strong>The original article</strong></h4><h4><a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jchemed.5c00479"><strong>Developing and Demonstrating a Lab Method for Quantifying Hair Exposure to Environmental Tobacco Smoke with a Forensic Perspective</strong></a></h4><p>Tanique Z. Jones, Christopher J. Trejo, Somayeh Mohammadi, and Hamidreza Sharifan*</p><p>J. Chem. Educ. 2026, 103, 1, 479–487</p><p><a target="_blank" rel="noopener noreferrer" href="https://doi.org/10.1021/acs.jchemed.5c00479">https://doi.org/10.1021/acs.jchemed.5c00479</a></p><h6>licensed under <a target="_blank" rel="noopener noreferrer" href="https://creativecommons.org/licenses/by/4.0/"><strong>CC-BY 4.0</strong></a></h6></blockquote><p><strong>Selected sections from the article follow. Formats and hyperlinks were adapted from the original.</strong></p><div><p>In forensic chemistry education, a reliable noninvasive lab module to assess cannabis and environmental tobacco smoke (ETS) exposure is critical as many crime scenes are associated with smoke and drug consumption. <a href="javascript:void(0);">(1,2)</a> Traditional lab methods, such as blood and urine analysis, are costly, often unfeasible in many institutes and require lengthy ethical approval processes, moreover, they provide only a snapshot of recent exposure and may not reflect long-term accumulation. <a href="javascript:void(0);">(3,4)</a> Hair analysis, on the other hand, can provide a comprehensive overview of an individual’s exposure over weeks to months, making it an invaluable tool in forensic chemistry education. <a href="javascript:void(0);">(5−7)</a> This study aims to develop a robust lab module that enables students to effectively understand hair exposure to ETS, with a specific focus on the differential retention of smoke residues in untreated, dyed, and bleached hair. We developed an experimental setup that can be further commercialized and utilized in educational settings for forensic and environmental studies. Through teaching forensic chemistry over four years, the lead author identified the need of a lab module in forensic chemistry education to be affordable, reliable, and noninvasive for students to assess environmental exposures that play a role in legal and investigative contexts. <a href="javascript:void(0);">(8,9)</a></p><p>ETS, commonly referred to as secondhand smoke, poses significant health risks and remains a pervasive issue in public health. <a href="javascript:void(0);">(10−12)</a> The detrimental effects of ETS exposure, including respiratory illnesses, cardiovascular diseases, and various cancers, are well-documented. <a href="javascript:void(0);">(13)</a> However, accurately quantifying an individual’s exposure to ETS, particularly in forensic contexts, presents unique challenges. Previous research highlights that ETS residues, specifically nicotine and its metabolites, serve as significant forensic markers in cases involving exposure assessments or custody disputes due to their persistence and detectability in biological matrices such as hair. <a href="javascript:void(0);">(14,15)</a> Hair, as a biological matrix, offers a distinctive advantage for assessing long-term exposure to environmental pollutants, <a href="javascript:void(0);">(16)</a> including tobacco smoke, narcotics, and marijuana. <a href="javascript:void(0);">(17)</a> This is due to its ability to incorporate and retain various substances over extended periods, providing a historical record of exposure. <a href="javascript:void(0);">(18,19)</a> Unlike blood or urine, which reflect recent exposure, hair analysis provides a longer window of detection, making it possible to assess chronic exposure to ETS. <a href="javascript:void(0);">(20)</a> In addition, using the hair supply for the forensic teaching lab is low-risk and cost-effective. Further, this technique is particularly useful in cases where long-term exposure needs to be demonstrated. Hair collection is a noninvasive procedure, easily performed without causing discomfort or distress to individuals. <a href="javascript:void(0);">(21,22)</a> This is especially advantageous in forensic contexts where minimal invasiveness is preferred. Hair has the unique ability to incorporate and retain nicotine and other smoke residues over time. <a href="javascript:void(0);">(23,24)</a> By examining untreated, dyed, and bleached hair, this lab module can empower students to differentiate hair treatments role in the adsorption of ETS components, enhancing the accuracy of exposure assessments. <a href="javascript:void(0);">(25,26)</a> This Lab module is flexible and integrable to improve understanding of the impact of cosmetic treatments on the absorption of environmental toxins. Through this experiment, instructors can design various forensic scenarios, including criminal investigations, workplace exposure assessments, and custody disputes where ETS exposure might be a relevant factor. <a href="javascript:void(0);">(27)</a> It provides forensic experts with a robust tool to support their findings with scientifically validated data. <a href="javascript:void(0);">(28)</a> This innovative approach enhances the forensic toolkit, allowing for more accurate and comprehensive exposure assessments.</p><h4><strong>Experimental</strong></h4><h5><strong>UV–Visible Spectroscopy Analysis</strong></h5><p>The concentration of smoke residues in the hair samples was quantified using UV–visible (UV–vis) spectroscopy (PerkinElmer) after extracting the adsorbed residues by rinsing the exposed hair samples with methanol three times. The resulting methanol extracts were scanned using a full wavelength range of 200–700 nm. Among the observed spectra, the absorbance at 280 nm was specifically monitored using second-order derivative processing.</p><p>The selection of 280 nm was based on its established association with strong π–π* transitions of aromatic compounds such as nicotine and polyaromatic hydrocarbons, which are prominent components of tobacco smoke. This wavelength consistently showed peak absorbance in our extracts across different hair types and exposure conditions, making it a reliable indicator for quantifying smoke residue deposition.</p><p>To ensure measurement accuracy, a baseline scan using deionized water was performed prior to sample analysis to subtract background noise. Spectra were collected at room temperature using a 2.5 nm sampling interval, fast scan speed, and 5.0 nm slit width. The UV–vis absorbance data at 280 nm were used to evaluate the extent of smoke residue adsorption on virgin, dyed, and bleached hair. Comparative analysis of these spectra provided insight into how cosmetic treatments influence the hair’s capacity to retain environmental smoke contaminants.</p><h5><strong>Zeta Potential Measurement</strong></h5><p>Hair samples were then cut into small pieces (&lt;1 cm in length) using scissors to facilitate grinding. The cut hair pieces were placed into a mortar and a small amount of liquid nitrogen was added to freeze the hair, making it brittle and easier to grind. The pestle was used to grind the frozen hair into a fine powder until a uniform consistency was obtained. 0.1 g of the hair powder was weighed using an analytical balance and transferred to a clean 15 mL polypropylene tube. To prepare the suspension, we added 10 mL of deionized (DI) water to the tube containing the hair powder and sonicated the suspension for 10 min to ensure uniform dispersion. The suspension was then centrifuged at 3000 rpm for 5 min to remove any large aggregates, and the supernatant was collected for zeta potential measurement. The hair suspension supernatant was transferred to the sample cell of the analyzer. Zeta potential measurements (n = 3) were performed using Malvern Zetasizer (Malvern, UK). The data was analyzed to determine the average zeta potential of the hair powder suspension, and the values for untreated hair were compared with those for dyed and bleached hair.</p><h5><strong>FTIR Analysis</strong></h5><p>The changes in functional groups of hair samples before and after smoke exposure were evaluated using FTIR at room temperature. The FTIR analysis adhered to the ASTM E1252 standard procedure, <a href="javascript:void(0);">(29)</a> employing the <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=3&amp;search=Nicolet+iS5"><strong>Thermo Scientific Nicolet iS5 FT-IR Spectrometer</strong></a>. <a href="javascript:void(0);">(30)</a> During the linear scan mode, the sampling depth varied across the spectrum. With an optical velocity of 0.47 cm/s, the Fourier frequency ranged from 470 to 940 Hz, covering a spectral range of 400 to 3000 cm<sup>–1</sup>.</p><h4><strong>Results and Discussion</strong></h4><p>As shown in <a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jchemed.5c00479#fig2">Figure 2</a>, the absorbance values recorded at the wavelength of 280 nm indicated potential absorption of nicotine and tar components with a positive correlation to the time of exposure within a 60 min interval. Hair treated with permanent dye displayed the highest levels of smoke residue deposition across all exposure intervals. The UV–visible absorbance spectra revealed a significant increase in smoke residue absorption compared to virgin and bleached hair, by 1.8 and 3.2 times higher at 60 min, respectively.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/J_Chem_Educ_2026_103_1_479_487_Figure_2_Absorbance_of_smoke_residues_dissolved_in_methanol_from_different_hair_types_over_time_fc288f5fce.jpeg" alt="J. Chem. Educ. 2026, 103, 1, 479–487: Figure 2. Absorbance of smoke residues dissolved in methanol from different hair types over time. The graph shows the absorbance 280 nm corresponding to nicotine and tar components on hair within 15, 30, 45, and 60 min." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_J_Chem_Educ_2026_103_1_479_487_Figure_2_Absorbance_of_smoke_residues_dissolved_in_methanol_from_different_hair_types_over_time_fc288f5fce.jpeg 181w," sizes="100vw" width="934" height="807"></p><p><a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jchemed.5c00479#fig3">Figure 3</a> shows the impact of cigarette smoke on untreated, dyed, and bleached hair samples using FTIR spectroscopy. This technique allowed students to investigate molecular-level changes in hair composition after exposure to ETS, providing a hands-on opportunity to connect theory with application. <a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jchemed.5c00479#fig3">Figure 3</a>A presents FTIR spectra of untreated hair (black line) and smoke-exposed untreated hair (red line). After exposure, noticeable new peaks and shifts in transmittance intensities emerge, indicating chemical alterations. Changes were especially prominent in the 3000–2800 cm<sup>–1</sup> region (C–H stretching of alkanes) and the 1700–1500 cm<sup>–1</sup> range (Amide I and II bands), which reflect modifications to the protein backbone of hair. These spectral changes served as real-time evidence of environmental interaction with biological samples. <a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jchemed.5c00479#fig3">Figure 3</a>B shows similar comparisons for dyed hair, where exposure to smoke caused intensified shifts in the 3500–3200 cm<sup>–1</sup> region (O–H and N–H stretching vibrations) and 1600–1500 cm<sup>–1</sup> (Amide II region). These alterations suggest chemical interactions between dye constituents and smoke residues. The elevated response in dyed hair indicates a higher reactivity due to prior chemical treatment.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/J_Chem_Educ_2026_103_1_479_487_Figure_3_FTIR_spectra_of_hair_samples_exposed_to_cigarette_smoke_6284805abf.jpeg" alt="J. Chem. Educ. 2026, 103, 1, 479–487: Figure 3. FTIR spectra of hair samples exposed to cigarette smoke. (A) Untreated hair compared to untreated hair exposed to cigarette smoke. (B) Dyed hair compared to dyed hair exposed to cigarette smoke. (C) Bleached hair compared to bleached hair exposed to cigarette smoke." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_J_Chem_Educ_2026_103_1_479_487_Figure_3_FTIR_spectra_of_hair_samples_exposed_to_cigarette_smoke_6284805abf.jpeg 245w," sizes="100vw" width="2100" height="580"></p><p><a target="_blank" rel="noopener noreferrer" href="https://pubs.acs.org/doi/10.1021/acs.jchemed.5c00479#fig3">Figure 3</a>C compares bleached hair before and after smoke exposure, with changes spanning 500–3200 cm<sup>–1</sup>. The broadening of peaks in the O–H stretching region and changes in Amide I and II bands point to structural degradation and protein damage induced by the dual effects of bleaching and smoke exposure. The increased porosity of bleached hair likely enhances its susceptibility to smoke residue adsorption. From an educational standpoint, this FTIR module reinforced critical analytical thinking by guiding students through spectral interpretation of real biological samples. Rather than working with abstract compounds, students explored how cosmetic alterations change a material’s chemical behavior and how forensic tools like FTIR can detect those changes. By comparing spectra across different hair conditions, students practiced identifying functional groups and recognizing patterns in complex data sets, skills directly transferrable to forensic, biomedical, and environmental chemistry fields.</p><p>Furthermore, this hands-on experience emphasized the interdisciplinary nature of forensic chemistry, combining biology, toxicology, and analytical instrumentation. Students gained confidence in interpreting real-world data and understanding how molecular-level changes relate to broader questions about environmental exposure and personal history, key themes in modern forensic investigations. This lab taught FTIR instrumentation also illustrated its power in addressing societal and legal questions through science.</p><h4><strong>Conclusion</strong></h4><p>This work delivers a practical, noninvasive laboratory module that quantifies hair exposure to environmental tobacco smoke while building core forensic-analytical competencies. Using controlled smoke exposure coupled with UV–visible spectroscopy, FTIR, and zeta potential measurements, students were able to detect and interpret chemical signatures of ETS on untreated, dyed, and bleached hair. Across techniques, cosmetic treatment was a decisive factor: treated hair exhibited distinct surface chemistry and structural changes that altered residue interactions and detectability. In our pilot, dyed hair frequently showed higher methanol-extractable residues by UV–Vis, whereas bleaching produced marked shifts in functional groups and more negative surface charge, indicating treatment-dependent mechanisms of adsorption and retention. These complementary observations reinforce the evidentiary value of multimodal analysis in exposure assessment and demonstrate how matrix history (cosmetic treatment) must be considered in forensic interpretation.</p><p>Pedagogically, the module achieved measurable learning gains. Pre/post assessments showed increased familiarity with forensic hair analysis, improved confidence with instrumental methods, and stronger capacity to translate spectra and surface-charge data into defensible conclusions. Because the workflow uses accessible instrumentation, clearly defined safety practices, and inexpensive materials, it is readily scalable for undergraduate teaching laboratories and adaptable to varied forensic scenarios (e.g., custody disputes, workplace exposure, scene reconstruction). Future iterations should incorporate quantitative calibration for specific ETS markers (e.g., nicotine/cotinine), broaden donor hair diversity and treatment histories, examine repeated/longer exposures and alternative smokes (e.g., cannabis), and evaluate decontamination protocols. Method validation across cohorts and institutions, coupled with structured interpretation frameworks, will further strengthen reliability and courtroom utility. Overall, the module integrates authentic forensic inquiry with robust analytics, providing a transferable teaching and investigative tool for assessing individual ETS exposure in hair.</p></div>

Developing and Demonstrating a Lab Method for Quantifying Hair Exposure to Environmental Tobacco Smoke with a Forensic Perspective

<p><strong>In the week from March 2, the following webinars await you in the field of atomic and molecular spectroscopy and spectrometry</strong></p><blockquote><h4><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinars"><strong>👉 DETAILS AND REGISTRATION IN THE WEBINARS SECTION</strong></a></h4><p><strong>👉 Search and filter in the largest global database</strong> with over <strong>5 500 GC, LC, MS and spectroscopy webinars</strong>.</p></blockquote><h5><strong>1. Bruker: Ride the Tide – Novel NMR Approaches for Peptide Conformation and Kinetics Characterization</strong></h5><ul><li>Tu, 3.3.2026 17:00 CET</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinar/5842">Registration</a></li></ul><p>Discover advanced NMR workflows for cyclic peptides and macrocycles, combining minimal restraints, high-resolution 3D conformations, and flow-NMR for real-time kinetic analysis.</p><h5><strong>2. Anton Paar: Heated Stories – What Differential Scanning Calorimetry Reveals About Petrochemical Materials</strong></h5><ul><li>Th, 5.3.2026 16:00 CET</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinar/5843">Registration</a></li></ul><p>Learn how Differential Scanning Calorimetry (DSC) reveals oxidation, thermal stability, and phase behavior in lubricants, fuels, and bituminous materials under thermal stress.</p><h5><strong>3. SPECTRO Analytical Instruments: Boost Your ICP-OES Accuracy</strong></h5><ul><li>Th, 5.3.2026 17:00 CET</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinar/5798">Registration</a></li></ul><p>Explore how advanced ICP-OES solutions simplify complex analytical workflows and deliver accurate, dependable results across diverse applications.</p>

Webinars LabRulezICPMS Week 10/2026

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<p><strong>This free online event is for chemists and engineers interested in learning new methods to design, monitor, and control flow processes. Each presenter will share presentations demonstrating the use of spectroscopy to track reaction performance in real-time for process and product optimization.</strong></p><p><strong>Program:</strong></p><ul><li>Novel developments in continuous flow reactor technologies</li><li>Advantages over batch processes</li><li>PAT for rapid analysis, optimization, and scale-up</li></ul><blockquote><h5><strong>Presenters</strong></h5><p><strong>Continuous Hydrogenation: Catalyst Screening to Continuous Processing using PAT and Data Rich Experimentation</strong></p><ul><li>Darren Whitaker, Associate Director - Takeda</li></ul><p><strong>Mechanochemistry: Chemical Synthesis without Bulk Reaction Solvent</strong></p><ul><li>Duncan L. Browne, Associate Professor in Organic Synthesis and Drug Discovery - University College London</li></ul><p><strong>Data-Rich Experimentations as Enabling Tool to Accelerate Small Molecule Process Development</strong></p><ul><li>Dr. Peter Sagmeister, Postdoctoral Associate - Massachusetts Institute of Technology</li></ul><p><strong>Approaching Acid Catalysis with Solid Acid in a Packed Bed Reactor</strong></p><ul><li>Zheng Zhao, Principal Chemical Engineer - Pfizer</li></ul></blockquote>

Mettler Toledo: Continuous Flow Process Optimization and Control

Continuous Flow Process Optimization and Control 

Novel developments in continuous flow reactor technologies, Advantages over batch processes and PAT for rapid analysis, optimization, and scale-up.

<header><h4><strong>Discover the Most Important Techniques for the Thermal Characterization of Food Products</strong></h4></header><main><div><div><h5><strong>Program</strong></h5><ul><li>Regulatory food standards and guidelines</li><li>Thermal analysis techniques (DSC, TOA, TGA, TMA, DMA, and DP)</li><li>Food applications</li><li>Techniques and field of application</li><li>Interactive Q&amp;A session</li></ul></div></div><div><div><div><p>Food plays a vital role beyond simply providing essential nutrients and nourishment—it is a pathway to good health. This evolving perspective has opened up new frontiers in food science, food technology, and the analytical testing of food products and ingredients.</p><p>Join our upcoming webinar to discover how thermal analysis techniques can be applied to investigate the properties of various food products and packaging throughout processing, storage, and quality control. We will showcase applications relevant to multiple segments of the food industry.</p><p><strong>Secure you spot now and don’t miss the opportunity to ask our experts your questions!</strong></p><h4><strong>Food: A Highly Regulated Industry</strong></h4><p>Food products have a direct impact on public health. As a result, international and national regulations mandate specific testing methods to ensure these sensitive products meet strict quality and safety standards. Thermal analysis is one such essential technique, playing a crucial role in characterizing a wide range of foods and packaging materials across various segments of the industry.</p><h4><strong>Important Thermal Analysis Techniques for the Food Industry</strong></h4><ul><li><strong>DSC:</strong> Important for determining melting behavior, used also for the heat of fusion, purity, polymorphism, glass transition, and oxidation stability.</li><li><strong>TGA:</strong> Mainly used to study evaporation, desorption &amp; vaporization behavior, thermal stability, kinetics of decomposition, and composition analysis.</li><li><strong>TOA: </strong>In this technique, visual observation is used to investigate melting behavior and polymorphism.</li><li><strong>TMA:</strong> Typically used to study expansion and shrinkage behavior of packaging films, as well as glass transition.</li><li><strong>DMA: </strong>This is the most sensitive method used for investigating glass transition.</li></ul><h4><strong>Typical Applications</strong></h4><p>Common applications include protein denaturization of dry milk powder (DSC), moisture content in edible oils (TGA), and the softening/melting of multilayer packaging film (TMA). However, the potential uses of thermal analysis techniques in the food industry are diverse and extensive!&nbsp;</p></div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><div style="max-width:1px;width:100%;" id="mediaContainerWrapper_2110920040"><div style="height:1px;width:1px;" data-external-url="" id="mediaContainer_2110920040" data-advanced-option="false" data-width="1" data-height="1" data-video-id="">&nbsp;</div></div></div></div></div></div></main><div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><blockquote><div><strong>Presenter: </strong>Dr. Teresa Dennenwaldt</div><p>Dr. Teresa Dennenwaldt obtained her PhD in chemistry in 2013 and completed a postdoc at the Ecole Polytechnique Fédérale de Lausanne, Switzerland in the field of electron microscopy and spectroscopy. In 2018, she joined METTLER TOLEDO as an application specialist for Thermal Analysis. In her current position, she expertly uses, teaches, and supports DSC, TGA, TMA, and DMA instruments at the METTLER TOLEDO head office in Switzerland.</p></blockquote></div></div></div>

Mettler Toledo: Thermal Analysis in the Food Industry

Thermal Analysis in the Food Industry

Join this webinar to learn key thermal analysis techniques for food products and packaging, regulatory requirements, and real-world food industry applications.

<header><h4><strong>Discover Useful Applications for Characterizing These Unique Materials</strong></h4></header><main><div><div><h5><strong>Program</strong></h5><ul><li>Introduction to nanomaterials</li><li>Basic properties and uses</li><li>Relevant thermal analysis techniques</li><li>Industries and suitable investigations</li><li>Application examples for industry and research (DSC, Flash DSC, TGA, and DMA)</li><li>Interactive Q&amp;A session</li></ul></div></div><div><div><div><p>Nanomaterials exhibit unique and diverse properties that enable a wide range of innovative applications. Their unique properties enhance catalysis, improve mechanical strength, and can even provide antibacterial effects in clothing. Their nanoscale size facilitates nucleation and also influences magnetic behavior.</p><p>Understanding the behavior of nanomaterials is crucial for harnessing their unique properties. This knowledge enables their use in advanced materials and innovative technological applications.</p><p><strong>Join our live webinar to explore how thermal analysis techniques can reveal the unique properties of nanomaterials.</strong></p><p>Be sure to prepare your questions for the live Q&amp;A with our experts!</p><h4><strong>Thermal Analysis Techniques for Characterizing Nanomaterials</strong></h4><ul><li><strong>DSC and Flash DSC</strong> are important techniques used to determine the glass transition, melting, crystallization behavior, reaction enthalpies and kinetics, and the influence of nanoparticle fillers.</li><li><strong>TGA</strong> is used to investigate stability, decomposition behavior and water sorption of nanomaterials.</li><li><strong>DMA</strong> is useful for characterizing the influence of nanoparticles on the mechanical behavior of viscoelastic materials as a function of time, temperature, and frequency of an oscillating stress.</li></ul><p>Don't miss the chance to deepen your understanding of thermal analysis techniques for characterizing these unique materials. Reserve your spot today!</p><h4><strong>Properties and Uses of Nanomaterials</strong></h4><p>The unique properties of nanomaterials enable diverse applications. For example, due to their high surface area, inefficient or unfavorable chemical reactions can often be improved by nanoparticle <strong>catalysts</strong>. When integrated into bulk materials, nanoparticles can <strong>tailor mechanical properties</strong> for advanced performance. Silver nanoparticles impart <strong>antibacterial qualities to clothing</strong>, preventing odors by eliminating bacteria. Additionally, their nanoscale size facilitates <strong>nucleation</strong>, aiding crystallization of larger molecules that would otherwise have difficulty crystallizing on their own.</p><p>Other uses of nanomaterials include structures such as <strong>silica gels </strong>and <strong>molecular sieves</strong> that have functional geometries on a nanoscale. Magnetic behavior can also vary with nanoparticle size, influencing <strong>magnetization dynamics</strong>.</p><p>These fascinating characteristics make nanomaterials pivotal in cutting-edge technology and materials science.&nbsp;</p></div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><div style="max-width:1px;width:100%;" id="mediaContainerWrapper_2110920040"><div style="height:1px;width:1px;" data-external-url="" id="mediaContainer_2110920040" data-advanced-option="false" data-width="1" data-height="1" data-video-id="">&nbsp;</div></div></div></div></div></div></main><div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><blockquote><div><strong>Presenter: </strong>Nicolas Fedelich</div><p>With a background in chemical engineering, Nicolas joined METTLER TOLEDO in 2009 as an application specialist for thermal analysis. Before that, he gained expertise in different laboratories implementing, developing, and validating analytical methods in both the pharmaceutical and environmental fields. Nicolas also worked for three years in the field carrying out on-site customer training and providing expert thermal analysis application support. In his present position, Nicolas expertly uses, teaches, and supports DSC, TGA, TMA, and DMA instruments at the METTLER TOLEDO head office in Switzerland.</p></blockquote></div></div></div>

Mettler Toledo: Thermal Analysis of Nanomaterials

Thermal Analysis of Nanomaterials

Join our live webinar to explore how thermal analysis techniques can reveal the unique properties of nanomaterials.

<header><h4><strong>A Guide to Choosing the Optimal Crucible for Your Experiment</strong></h4></header><main><div><div><h5><strong>Program</strong></h5><ul><li>Introduction to thermal analysis crucibles</li><li>DSC crucibles and application examples</li><li>TGA crucibles and application examples</li><li>Tips and hints for selecting the right crucible</li><li>Interactive Q&amp;A session</li></ul></div></div><div><div><div><p>Selecting the right crucible for your application can be a complex process, given the wide range of products available. Making the right choice, however, is essential for obtaining accurate results and protecting your thermal analysis module.</p><p>Using several practical examples for differential scanning calorimetry (<strong>DSC</strong>) and thermogravimetric analysis (<strong>TGA</strong>), this webinar helps you navigate through the many different choices, giving you confidence in your results.</p><p>After the presentation, you will have the opportunity to join the live Q&amp;A session with our experienced METTLER TOLEDO application specialists. &nbsp;</p><p>Want to learn more? Register for our webinar today!</p><h4><strong>Why Using the Right Crucible Is Essential</strong></h4><p>Often, the difference between an accurate and a flawed result has nothing to do with the measuring device, but rather the type of crucible used. For example:</p><ul><li>Crucible material, size, quality, and lids must be carefully selected, according to the application.</li><li>A smooth, flat base is critical to ensure perfect contact with the sample and optimal heat transfer.</li></ul><p>Join our live webinar and discover useful tips and hints on how to select the correct crucible for different types of DSC and TGA applications</p><p><strong>Don’t forget to prepare your questions for the live Q&amp;A with our experts!</strong></p></div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><div style="max-width:1px;width:100%;" id="mediaContainerWrapper_2110920040"><div style="height:1px;width:1px;" data-external-url="" id="mediaContainer_2110920040" data-advanced-option="false" data-width="1" data-height="1" data-video-id="">&nbsp;</div></div></div></div></div></div></main><div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><blockquote><div><strong>Presenter: </strong>Angela Hammer (Dr. sc. nat. ETH)</div><p>Dr. Angela Hammer received a Ph.D. in Analytical Chemistry (development of immobilized components for the use in ion-selective electrodes based on polyurethane membranes) from the Institute of Organic Chemistry at the Swiss Federal Institute of Technology in Zürich, Switzerland. She then joined Sika Technology AG in Zurich, Switzerland, as an analytical chemist. In 2007, she joined METTLER TOLEDO and has worked there since as an application specialist for Thermal Analysis. In her present position, she uses, teaches, and supports DSC, TGA, TMA, and DMA instruments for the METTLER TOLEDO’s Materials Characterization Group located at the head office in Switzerland.</p></blockquote></div></div></div>

Mettler Toledo: Crucible Selection for Thermal Analysis

Crucible Selection for Thermal Analysis

Join our live webinar and discover useful tips and hints on how to select the correct crucible for different types of DSC and TGA applications

<header><h4><strong>Useful Techniques for Identification and Characterization</strong></h4></header><main><div><div><h5><strong>Program</strong></h5><ul><li>What are thermosets? Basic properties and formation</li><li>Thermal analysis techniques for studying thermosets</li><li>Application examples using DSC, TGA, TMA, and DMA</li><li>Which technique should be used in your analysis?</li><li>Interactive Q&amp;A session</li></ul></div></div><div><div><div><p>A thermoset is a polymer that undergoes a particular chemical reaction, known as curing, to form a permanent, heavily cross-linked structure. The material cannot be melted or remolded to form a new shape, even at high temperatures. Thermosets are typically rigid and insoluble, with high mechanical strength and temperature stability. Examples include epoxy resins, phenolic resins, polyesters, and polyurethanes.</p><p>Due to their highly temperature-dependent physical behavior, thermal analysis is an ideal set of techniques for identifying and characterizing these materials.</p><p>This webinar discusses the most important thermal properties of thermosets and describes useful thermal analysis techniques used to analyze them.</p><p><strong>Register now to secure your spot and join the live Q&amp;A!</strong></p><h4><strong>How to Characterize Thermosets</strong></h4><p>Different thermal techniques can be used to determine the key properties of these materials:</p><ul><li><strong>DSC:</strong> Useful for determining glass transition, melting, reaction enthalpies, curing and thermal stability.</li><li><strong>TGA:</strong> Mainly used for composition analysis, thermal stability, decomposition, evaporation, and desorption behavior.</li><li><strong>TMA: </strong>Typically used to study mechanical behavior such as expansion, shrinkage, softening, plus glass transition.</li><li><strong>DMA: </strong>Best for studying viscoelastic behavior, glass transition, and frequency-dependent effects.</li></ul><h4><strong>What is a Typical Analysis of a Thermoset?</strong></h4><p>A typical and important analysis of a thermoset is the characterization of epoxy resin materials. In this case, determining the glass transition temperature (Tg) and investigating the curing reaction are highly important. This information can be used in manufacturing, for example testing the process conditions required to properly cure thermosets. It can also be used in quality control, to check the expected Tg of a known material.&nbsp;</p></div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><div style="max-width:1px;width:100%;" id="mediaContainerWrapper_2110920040"><div style="height:1px;width:1px;" data-external-url="" id="mediaContainer_2110920040" data-advanced-option="false" data-width="1" data-height="1" data-video-id="">&nbsp;</div></div></div></div></div></div></main><div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><blockquote><div><strong>Presenter: </strong>Dr. Teresa Dennenwaldt</div><p>Dr. Teresa Dennenwaldt obtained her PhD in chemistry in 2013 and completed a postdoc at the Ecole Polytechnique Fédérale de Lausanne, Switzerland in the field of electron microscopy and spectroscopy. In 2018, she joined METTLER TOLEDO as an application specialist for Thermal Analysis. In her current position, she expertly uses, teaches, and supports DSC, TGA, TMA, and DMA instruments at the METTLER TOLEDO head office in Switzerland.</p></blockquote></div></div></div>

Mettler Toledo: Thermal Analysis of Thermoset Materials

Thermal Analysis of Thermoset Materials

This webinar discusses the most important thermal properties of thermosets and describes useful thermal analysis techniques used to analyze them.

<header><h4><strong>Discover the Secrets of Tire Performance and Safety</strong></h4></header><main><div><div><h5><strong>Program</strong></h5><ul><li>Explore key material properties that define tire performance</li><li>Understand tire design and material formulation</li><li>Discover the thermal analysis techniques driving innovation in the tire industry</li><li>See real-world applications using DSC, Flash DSC, TGA, and DMA</li><li>Participate in a live Q&amp;A session with our experts</li></ul></div></div><div><div><div><p>Modern tires are the result of decades of cutting-edge research, combining synthetic and natural rubber, fabrics, wires, carbon black, and other chemical compounds to deliver safety, comfort, and durability. The tread provides critical traction, while the compressed-air filled body ensures comfort and structural integrity.</p><p>Thermal analysis offers powerful insights into these materials, helping to predict tire behavior, guide compositional analysis, and ensure reliable quality control. Join us to learn how these advanced techniques transform tire research and development.</p><h4><strong>Why Attend This Webinar?</strong></h4><p>This webinar is designed for researchers, engineers, polymer specialists, and quality control professionals eager to deepen their understanding of tire materials through thermal analysis.</p><p><strong>Register now to secure your spot and join the live Q&amp;A!</strong></p><h4><strong>The Tire Tread</strong></h4><p>In direct contact with the road, the composition of the tread material, together with the design of the tread pattern impact rolling resistance, traction, and abrasion resistance. During the webinar we will present how different thermal analysis techniques help optimize these properties.</p><h4><strong>Characterizing Tires with Thermal Analysis</strong></h4><p>Different thermal analysis techniques can be used to determine the key properties of tires, which are critical for safety and performance:</p><ul><li><strong>DSC </strong>measures heat flow of a sample to determine the glass transition temperature (Tg), critical for tire safety across different temperature zones, quality control, and material identification. DSC is also used to understand the crystallization and melting behaviors of tire materials.</li><li><strong>Flash DSC</strong> is an ultra-fast scanning calorimetry technique that reveals crystallization kinetics and polymer microstructure using very high heating rates.</li><li><strong>TGA </strong>measures the change in mass of a sample as it is heated. Key applications for the tire industry are compositional analysis and decomposition behavior.</li><li><strong>DMA</strong> is used to determine dynamic mechanical properties of materials, such as the modulus and damping behavior. It allows critical tire properties, such as rolling resistance or grip, to be directly predicted.</li></ul><p><strong>Don’t miss this opportunity to enhance your knowledge and advance your work with state-of-the-art thermal analysis techniques.</strong></p></div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><div style="max-width:1px;width:100%;" id="mediaContainerWrapper_2110920040"><div style="height:1px;width:1px;" data-external-url="" id="mediaContainer_2110920040" data-advanced-option="false" data-width="1" data-height="1" data-video-id="">&nbsp;</div></div></div></div></div></div></main><div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><blockquote><div><strong>Presenter: </strong>Angela Hammer (Dr. sc. nat. ETH)</div><p>Dr. Angela Hammer received a Ph.D. in Analytical Chemistry (development of immobilized components for the use in ion-selective electrodes based on polyurethane membranes) from the Institute of Organic Chemistry at the Swiss Federal Institute of Technology in Zürich, Switzerland. She then joined Sika Technology AG in Zurich, Switzerland, as an analytical chemist. In 2007, she joined METTLER TOLEDO and has worked there since as an application specialist for Thermal Analysis. In her present position, she uses, teaches, and supports DSC, TGA, TMA, and DMA instruments for the METTLER TOLEDO’s Materials Characterization Group located at the head office in Switzerland.</p></blockquote></div></div></div>

Mettler Toledo: Thermal Analysis of Tires

Thermal Analysis of Tires

Join this webinar to discover how thermal analysis supports tire development, quality control, and safety by characterizing critical rubber and tread properties

<header><h4><strong>Learn Basic DSC Principles and Find Useful Applications for Your Workplace</strong></h4></header><main><div><div><h5><strong>Program</strong></h5><ul><li>Basic principles of DSC with an explanation of power compensation and heat flux modes</li><li>Important components of the DSC measurement cell, the innovative sensor, and modules for specialized applications</li><li>Measurement parameters such as the temperature program and choice of atmosphere</li><li>Why you should use DSC for your analysis</li><li>Application examples for different industries</li><li>Live Q&amp;A session</li></ul></div></div><div><div><div><p><strong>Differential Scanning Calorimetry (DSC)</strong> is used to study the behavior of materials as they respond to a defined temperature program. The technique measures the heat, in mW, absorbed or released by a sample as it is heated, cooled, or held at a constant temperature. Measurement results are presented in the form of a curve, from which the glass transition, crystallization, melting, and many other thermal properties can be determined.</p><p>The DSC technique has applications in a wide range of industries. For example, checking the “fingerprint” of a measurement curve is a common application for quality control purposes. Other applications include investigating the influence of additives or different processing methods on a substance.</p><p>Join our webinar on DSC to gain knowledge and get the opportunity to ask our experts your questions!</p></div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><div style="max-width:1px;width:100%;" id="mediaContainerWrapper_2110920040"><div style="height:1px;width:1px;" data-external-url="" id="mediaContainer_2110920040" data-advanced-option="false" data-width="1" data-height="1" data-video-id="">&nbsp;</div></div></div></div></div></div></main><div><div><div data-advanced-option="false" data-has-preview-image="false" data-video-id="" data-component-id="2110920040"><blockquote><div><strong>Presenter: </strong>Dr. Teresa Dennenwaldt</div><p>Dr. Teresa Dennenwaldt obtained her PhD in chemistry in 2013 and completed a postdoc at the Ecole Polytechnique Fédérale de Lausanne, Switzerland in the field of electron microscopy and spectroscopy. In 2018, she joined METTLER TOLEDO as an application specialist for Thermal Analysis. In her current position, she expertly uses, teaches, and supports DSC, TGA, TMA, and DMA instruments at the METTLER TOLEDO head office in Switzerland.</p></blockquote></div></div></div>

Mettler Toledo: Differential Scanning Calorimetry

Differential Scanning Calorimetry

Join our webinar on DSC to gain knowledge and get the opportunity to ask our experts your questions!

<h4><strong>Food Safety Webinar Series: When Food Meets the Lab</strong></h4><p><strong>Food testing in the region still revolves around “legacy” contaminants that decide release, rejection, and recall discussions - veterinary drug residues, pesticide residues and fumigants, and toxic elements including species-sensitive forms, in different food matrices. This 3-part series is built for audiences where regulatory expectations reference Codex-based frameworks, country-specific legislative guidelines, and import/export-market requirements that influence testing scope, reporting limits, and confirmation criteria. Each webinar focuses on the analytical factors that drive outcomes: matrix effects and co-extractives, trace-level quantitation, transition/ion-ratio checks, interference control, and reportable result logic.</strong></p><p>Keynote expert speakers will set the regulatory context, give a glimpse of the current trends, and future implications. Agilent workflow segments map these needs to sample preparation nuances, LC-MS/MS for multi-class residues, GC-MS/MS and headspace GC for residue/fumigant markers, and ICP-MS plus LC-ICP-MS for heavy metals and speciation, including QC structures and data review patterns used in high-throughput labs, to name a few.</p><h5><strong>Webinar Series Details</strong></h5><ul><li>Register once to attend the complete 3-part series</li><li>Submit your questions beforehand</li><li>Access recorded sessions anytime within one year</li><li>Certificate of attendance will be provided to all attendees</li></ul><h4><strong>Part 3: Heavy Metals &amp; Speciation Edition</strong></h4><p>Toxic element testing continues to be a core requirement due to national contaminant limits and trade-facing specifications for Pb, Cd, Hg, As and related elements. This webinar separates total-element panels from speciation cases where chemical form affects interpretation, particularly arsenic species in rice/cereal products and marine foods. The session covers digestion strategy, contamination control, reagent blank behavior, and trace-level drivers of data quality: polyatomic/isobaric interference removal, drift control, internal standards, calibration verification, and batch acceptance logic. Speciation discussion includes species-preserving extraction, chromatographic separation choices, prevention of species interconversion, and interpretation of species profiles under matrix load.</p><blockquote><p><strong>Presenter: </strong>Dr. Usharani Dandamudi (Senior Principal Scientist, FS &amp; AQCL, CSIR-Central Food Technological Research Institute (CFTRI), India)</p><p><strong>Presenter: </strong>Dr. Vinay Jain (Application Engineer, Agilent Technologies, India)</p></blockquote>

Agilent Technologies: Food Safety Webinar Series: When Food Meets the Lab

Heavy Metals & Speciation Edition

Heavy metals and speciation webinar: ICP-MS and LC-ICP-MS workflows for Pb, Cd, Hg, arsenic species and trace-level food testing.

<div><div container-id="cq-colctrl-lt0" comp-id="A1"><div><p><strong>General tips and advice to improve analysis quality, minimize downtime, increase laboratory efficiencies and reduce costs on your ICP-OES or ICP-MS.</strong></p><h5><strong>Learning Points</strong></h5><ul><li>How to optimize your instrument to improve data quality</li><li>Troubleshooting and maintenance tips and tricks</li><li>Improving your sample preparation techniques</li></ul><h5><strong>Who should attend?</strong></h5><ul><li>Users looking to enhance their current trace elemental analysis</li><li>Users who are looking to overcome their current trace elemental analysis challenges within their laboratory</li><li>Users looking to gain more experience of trace elemental analysis</li></ul><blockquote><p><strong>Presenter: </strong>Matthew Gregory (Field Application Scientist, EMEA North, Trace Elemental Analysis, Thermo Fisher Scientific)</p><p>After graduating from the University of Surrey with an MChem in Chemistry, Matthew has gained over 20 years’ experience of trace elemental analysis in industry, working in environmental and precious metal research laboratories. In 2018, Matthew joined Thermo Fisher Scientific as an Applications Specialist for the Trace Elemental Analysis product range in the UK and Ireland.</p><p><strong>Presenter: </strong>David Fishwick (Field Application Scientist, EMEA North, Trace Elemental Analysis, Thermo Fisher Scientific)</p><p>David joined Thermo in 2022 as an Applications Specialist for the Trace Elemental Analysis product range in the UK and Ireland. Prior to joining Thermo, David has gained experience of trace elemental analysis and chromatography in industry, working in GMP, GLP and UKAS accrediated R&amp;D and pharmaceutical laboratories. David holds a BSc in Chemistry from Bangor University.</p><p><strong>Presenter: </strong>Petra Gerhards (Regional Marketing Manager, EMEA, AAT, Thermo Fisher Scientific)</p><p>Petra ist Diplom-Ingenieurin für instrumentelle analytische Chemie der Technischen Universität Krefeld/Deutschland. Seit mehr als 30 Jahren arbeitet sie auf dem Gebiet der Gaschromatographie und hat Erfahrung mit vielen Technologien im Bereich GC und GC-MS. Derzeit unterstützt sie in ihrer Position als EMEA Regional Marketing Manager Anwender und Kundenanwendungsteams in ganz EMEA.</p></blockquote></div></div></div>

Thermo Fisher Scientific: Lunch and Learn Tips and Tricks Series: Trace Elemental Analysis (ICP-OES & ICP-MS)

Lunch and Learn Tips and Tricks Series: Trace Elemental Analysis (ICP-OES & ICP-MS)

Expert tips for ICP-OES and ICP-MS to improve data quality, reduce downtime, and increase laboratory efficiency.

Lunch & Learn: ICP-OES & ICP-MS Tips

<div><div container-id="cq-colctrl-lt0" comp-id="A1"><div><p><strong>Are you having trouble with your ICP-OES or ICP-MS analysis? &nbsp;Do you need some advice on standard or sample preparation? Join this live session to ask your questions to our trace elemental analysis experts. Submit your questions at registration.</strong></p><h5><strong>Learning Points</strong></h5><ul><li>An opportunity for you to ask our trace elemental analysis experts any of your burning questions</li></ul><h5><strong>Who should attend?</strong></h5><ul><li>Users looking to enhance their current trace elemental analysis</li><li>Users who are looking to overcome their current trace elemental analysis challenges within their laboratory</li><li>Users looking to gain more experience of trace elemental analysis</li></ul><blockquote><p><strong>Presenter: </strong>Matthew Gregory (Field Application Scientist, EMEA North, Trace Elemental Analysis, Thermo Fisher Scientific)</p><p>After graduating from the University of Surrey with an MChem in Chemistry, Matthew has gained over 20 years’ experience of trace elemental analysis in industry, working in environmental and precious metal research laboratories. In 2018, Matthew joined Thermo Fisher Scientific as an Applications Specialist for the Trace Elemental Analysis product range in the UK and Ireland.</p><p><strong>Presenter: </strong>David Fishwick (Field Application Scientist, EMEA North, Trace Elemental Analysis, Thermo Fisher Scientific)</p><p>David joined Thermo in 2022 as an Applications Specialist for the Trace Elemental Analysis product range in the UK and Ireland. Prior to joining Thermo, David has gained experience of trace elemental analysis and chromatography in industry, working in GMP, GLP and UKAS accrediated R&amp;D and pharmaceutical laboratories. David holds a BSc in Chemistry from Bangor University.</p><p><strong>Presenter: </strong>Petra Gerhards (Regional Marketing Manager, EMEA, AAT, Thermo Fisher Scientific)</p><p>Petra ist Diplom-Ingenieurin für instrumentelle analytische Chemie der Technischen Universität Krefeld/Deutschland. Seit mehr als 30 Jahren arbeitet sie auf dem Gebiet der Gaschromatographie und hat Erfahrung mit vielen Technologien im Bereich GC und GC-MS. Derzeit unterstützt sie in ihrer Position als EMEA Regional Marketing Manager Anwender und Kundenanwendungsteams in ganz EMEA.</p></blockquote></div></div></div>

Thermo Fisher Scientific: Trace Elemental Analysis: Ask the Expert

Trace Elemental Analysis: Ask the Expert

Live Q&A on ICP-OES and ICP-MS with experts in trace elemental analysis and sample preparation.

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