In <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products?category=227&amp;manufacturerItems=3">ICP-OES</a> analysis, maintaining reliable accuracy and precision over time can be challenging. Instrument drift, matrix effects, and fluctuations in sample introduction can all influence analytical results. One of the most effective tools to monitor and compensate for these influences is the internal standard (ISTD). When properly selected and implemented, an internal standard significantly strengthens quality assurance and increases confidence in analytical data.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Thermo_Fisher_Scientific_Internal_Standards_in_ICP_OES_A_Practical_Guide_to_Better_Accuracy_and_Precision_50d02d62c8.jpg" alt="Thermo Fisher Scientific Internal Standards in ICP-OES A Practical Guide to Better Accuracy and Precision" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Thermo_Fisher_Scientific_Internal_Standards_in_ICP_OES_A_Practical_Guide_to_Better_Accuracy_and_Precision_50d02d62c8.jpg 245w," sizes="100vw" width="1024" height="512">An internal standard is a suitable element that is added at a constant concentration to all blanks, calibration standards, quality control samples, and unknown samples. It is measured simultaneously with the analytes of interest and serves as an indicator of what is happening during the measurement process. Because it behaves similarly to the analytes in the plasma, it reflects variations that occur during sample transport, excitation, or detection.However, not every element qualifies as a good internal standard. Ideally, the chosen element should not be present in the sample, or only in negligible amounts. It must not cause spectral interferences with the analytes, and its emission line should remain free from interference itself. The internal standard should also be compatible with the sample matrix and exhibit similar excitation and ionization characteristics to the analytes. In practice, the internal standard is typically introduced at a concentration of approximately 1 to 5 ppm at the nebulizer, ensuring a clean and stable signal.When correctly applied, internal standards help correct for several types of variation. They compensate for changes in sample transport caused by pump instability or nebulizer fluctuations. They correct for plasma instability and optical drift over time. They also address certain matrix-related effects, such as changes in viscosity or surface tension that influence aerosol formation and excitation efficiency. By normalizing the analyte signal to the internal standard signal, many physical and instrumental variations can be effectively minimized.It is important to understand, however, what internal standards cannot correct. They do not resolve spectral overlaps or interferences. They cannot compensate for incorrect calibration or non-linear response behavior. Detector saturation and fundamental method errors also remain unaffected by internal standard correction. In other words, an internal standard enhances a well-designed method but cannot rescue a flawed one.Internal standards are particularly valuable in long analytical sequences, where system drift can gradually affect results. By continuously monitoring the internal standard signal, laboratories can detect and correct drift in real time. They are also helpful in sequences involving strongly varying sample matrices. Differences in density or viscosity between samples can influence transport efficiency, and the internal standard provides a way to monitor and partially compensate for these effects.Another important application of internal standards is in high-precision analysis. In precious metal determinations, for example, internal drift correction can be applied to each individual measurement. When combined with a bracketing approach, this technique can dramatically improve overall precision. In one example presented, a total precision of 0.07% over twelve measurements was achieved despite variability in individual readings. Such performance illustrates the strength of internal standard correction when precision requirements are demanding.There are two main approaches to introducing the internal standard into the ICP-OES system. In the classical approach, all blanks, standards, quality controls, and samples are spiked with the internal standard prior to measurement. This method requires careful preparation to ensure consistent concentration across all solutions. Alternatively, the internal standard can be added online during measurement using a Y-connector. In this configuration, the internal standard solution is continuously mixed with each sample as it is introduced into the nebulizer. While this method simplifies preparation and reduces the risk of spiking errors, it introduces a dilution factor that must be considered.Practical examples show that correct implementation is crucial. Poor sample homogenization can lead to incorrect internal standard correction, particularly in challenging matrices such as mineral oils. If the sample is not homogeneous, the internal standard may not reflect the true behavior of the analytes, leading to misleading corrections. Therefore, careful sample preparation remains essential, even when internal standards are used.Internal standards also play a valuable role during method development. When establishing a new method, the internal standard can be used to verify matrix compatibility and recovery. Recovery tests with certified reference materials help determine whether matrix adaptation is necessary. If recovery is not satisfactory, matrix matching can be optimized through dilution strategies or calibration adjustments. Tools such as SemiQuant in<a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/1489"> Qtegra software</a> can assist in identifying matrix components and guiding method optimization. Even if the internal standard is later omitted in routine operation, its use during development provides valuable insight into method robustness.It is worth noting that Argon, which is always present in the plasma, can act as a kind of “pseudo-internal standard”. While it does not replace a true internal standard element, monitoring the argon signal can provide useful information about plasma stability.In summary, internal standards are powerful tools for improving analytical reliability in ICP-OES. They help monitor and correct drift, improve precision, and increase confidence in results, especially in complex or variable matrices. However, they must be carefully selected, properly implemented, and understood in terms of their limitations. Used thoughtfully, internal standards strengthen both routine analysis and method development, contributing to consistent and trustworthy laboratory performance.<h3>Acknowledgement</h3>I would like to thank Dr. Torben Stichel, Dr. Joerg Axthelm and Dr. Sebastian Voelker Field Applications Scientist, Germany, Trace Elemental Analysis and for the support on this blog and the webinars.<h4>Sign up for our webinars live and on demand</h4><h5>English</h5><ul><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinar/5795">Lunch and Learn Tips and Tricks Series: Qtegra Part 1</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinar/5976">Lunch and Learn Tips and Tricks Series: Qtegra Part 2</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinar/5977">Lunch and Learn Tips and Tricks Series: Trace Elemental Analysis (ICP-OES &amp; ICP-MS)</a></li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/webinar/5978">Trace Elemental Analysis: Ask the Expert</a></li></ul><h5>Deutsch</h5><ul><li>19. März 2026 <a target="_blank" rel="noopener noreferrer" href="https://event.on24.com/wcc/r/5179134/393E071E3B501943730958BA6203F477">Interne Standards in der ICP-OES: Ein Praxisguide für zuverlässige Qualitätssicherung im Labor</a></li><li>18. Juni 2026 <a target="_blank" rel="noopener noreferrer" href="https://event.on24.com/wcc/r/5179292/AE4C576B6A54D1AC182F7F77573D380F">Fehler reduzieren, Durchsatz steigern: Autoverdünnung mit PrepFast am ICP-MS</a></li><li>17. September 2026 <a target="_blank" rel="noopener noreferrer" href="https://event.on24.com/wcc/r/5179423/B5019C560431BADCA2A76E54E4EFE56F">ICP-OES smarter nutzen: Probendurchsatz erhöhen, Ressourcen sparen</a></li><li>17. Dezember 2026 <a target="_blank" rel="noopener noreferrer" href="https://event.on24.com/wcc/r/5179530/94EEDD1F56138F5EEE2AF24E29E6C12A">Qtegra ISDS Software Unlocked – Live im Expertengespräch</a></li></ul>Visit us on&nbsp;<a target="_blank" rel="noopener noreferrer" href="https://www.linkedin.com/showcase/72003132/admin/dashboard/">LinkedIn:</a>&nbsp;#ICP_OES #InternalStandards #ElementalAnalysis #TraceElementAnalysis<blockquote><h5>Petra Gerhards</h5>Petra Gerhards, Dipl-Ing, is Regional Marketing Manager of GC and GC-MS for EMEA at Thermo Fisher Scientific. She has more than 29 years of experience in the fields of GC-MS, SPE and LC-MS. Since joining the regional team she has contributed to workflow solutions combining vials and closures with SPE solutions, GC-MS and LC-MS. She works with KOL's on data for regional specific marketing campaigns, organizes in-house seminars and works on customer specific solutions. Her main expertise is in the field of doping and drugs-of-abuse analysis.</blockquote>

Internal Standards in ICP-OES: A Practical Guide to Better Accuracy and Precision

Our Library never stops expanding. What are the most recent contributions to LabRulezICPMS Library in the week of 6th April 2026? Check out new documents from the field of spectroscopy/spectrometry and related techniques!<blockquote>👉 <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library">SEARCH THE LARGEST REPOSITORY OF DOCUMENTS ABOUT SPECTROSCOPY/SPECTROMETRY RELATED TECHNIQUES</a></blockquote><blockquote>👉 Need info about different analytical techniques? Peek into <a target="_blank" rel="noopener noreferrer" href="https://lcms.labrulez.com/library">LabRulezLCMS</a> or <a target="_blank" rel="noopener noreferrer" href="https://gcms.labrulez.com/library">LabRulezGCMS</a> libraries.</blockquote>This week we bring you application notes by Metrohm, Shimadzu, Thermo Fisher Scientific and Waters Corporation!<h3>1. Metrohm: Whey permeate analysis with NIRS</h3>Monitor dairy production processes easily in seconds<ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_nir_144_download_34598659f1.pdf">Full PDF for download</a></li></ul>Whey permeate, a byproduct of manufacturing whey protein powder, contains high amounts of lactose, phosphate, and minerals. Because of its sweet and mild taste, whey permeate is often used in bakeries and chocolate manufacturing. The key to optimizing whey permeate production is to control production streams in real time. It is important to monitor the production process with highthroughput analytical techniques to maximize product yield and ensure high product quality.&nbsp;Nearinfrared spectroscopy (NIRS) is a fast, and chemicalfree analysis technique that can support this kind of testing. NIR spectroscopy can measure the most important quality parameters (i.e., protein, lactose, moisture, ash, pH, and phosphate) simultaneously in whey permeate without any sample preparation. The NIRS solution is fast, easy to operate, and can be used atline or offline in a quality control lab.<h4>EXPERIMENTAL EQUIPMENT&nbsp;</h4>158 whey permeate samples were analyzed on a <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=220&amp;search=NIR+analyzer">Metrohm NIR Analyzer</a> equipped with a small cup accessory. All measurements were performed in reflection mode (1000–2250 nm). Metrohm software was used for data acquisition and prediction model development.<h4>CONCLUSION&nbsp;</h4>This Application Note demonstrates the feasibility of using NIR spectroscopy for whey permeate quality control. Near infrared-spectroscopy is a rapid, nondestructive analytical technique that can monitor the production process of dairy products. Aside from the analysis of whey permeate, the whey protein production stream can also be monitored by NIRS.<h3>2. Shimadzu: Measurement of Residual Metal Catalysts by X-ray Fluorescence</h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/an_01_01086_en_4beb25fd1d.pdf">Full PDF for download</a></li></ul><h4>User Benefits</h4><ul><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=1&amp;search=ALTRACE">ALTRACE</a> can determine levels of heavy metals present in organic compounds at around 1 mg/kg in under 10 minutes per sample.</li><li>Analyzing and managing levels of residual metal catalysts can be performed by simply placing samples in the sample vessel and analyzing them without the need for complex sample pretreatment.</li><li>By increasing the X-ray tube power and optimizing the optical design, the sensitivity of ALTRACE for heavy metals has been dramatically improved compared to the previous model.</li></ul>Many industrial products we encounter every day are produced from organic compounds by manufacturing processes that utilize a range ofsynthesisreactions and metal catalysts. Catalysis can be classified as either homogeneous or heterogeneous (although drug and chemical production processes typically use homogeneous catalytic systems). While homogeneous catalysis allows for precise control over catalytic reactions, recovering the catalyst after the reaction can be difficult.&nbsp;Nevertheless, managing the levels of residual catalysts in industrial products is critical to ensure safety and because of their high costs. For example, the ICH Q3D Guideline for Elemental Impurities (adopted in April 2017) requires risk assessments when materials such as metal catalysts are added intentionally during a production process.&nbsp;Energy dispersive X-ray fluorescence (EDXRF) spectrometry offers a simple but effective technique for assessing the levels of residual metal catalysts. Normally, the lower limit of quantification for EDXRF spectrometric analysis of heavy metals is above 1 mg/kg, which limitsits use in quantitative analysis. However, the <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=1&amp;search=ALTRACE">ALTRACE</a> is equipped with a high-power X-ray tube that dramatically improves its sensitivity for heavy metals, enabling their determination at 1 mg/kg and below in lessthan 10 minutes. This Application News describes using ALTRACE to determine residual levels of a homogeneous catalyst after a synthesis reaction. The catalyst used in this analysis is palladium (Pd), which is a widely applied heavy metal catalyst, and the reaction catalyzed by the Pd catalyst is a cross-coupling reaction. A metal scavenger and activated carbon were each used to remove the Pd catalyst from the reaction products. Metal scavengers are frequently used in this role, and activated carbon offers a relatively cheap method for removing catalysts.<h4>Conclusion&nbsp;</h4>Common methods of elemental impurity analysis, such as atomic absorption spectrometry (AAS), ICP atomic emission spectroscopy (ICP-AES), and ICP mass spectrometry (ICP-MS), require liquid samples, so solid and powder samples must be prepared into a solution prior to analysis. However, EDXRF spectrometry can determine levels of elemental impurities regardless of the sample phase or form (solution, powder, etc.), provided the target element is distributed uniformly throughout the sample. The sensitivity of ALTRACE for heavy metals has been substantially improved compared to previous models, allowing for rapid quantitative determination of heavy metals at 1 mg/kg and below. Based on the performance presented in this article, ALTRACE is an effective tool for managing residual levels of metal catalysts.<h3>3. Thermo Fisher Scientific: The Raman Spectroscopy of Graphene and the Determination of Layer Thickness</h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/raman_spectroscopy_graphene_determination_layer_thickness_an52252_29274e8aea.pdf">Full PDF for download</a></li></ul>Currently, a tremendous amount of study is being directed toward graphene. This interest is driven by the novel properties that graphene possesses and its potential use in a variety of application areas that include but are not limited to electronics, heat transfer, bio-sensing, membrane technology, battery technology and advanced composites. Graphene exists as a transparent two-dimensional network of carbon atoms. It can exist as a single atomic-layer thick material, or it can be readily stacked to form stable, moderately thick samples containing millions of layers—a form generally referred to as graphite. However, the interesting properties exhibited by graphene (substantial electrical and thermal conductivity, high mechanical strength, and high optical transparency) are only observed for graphene films that contain only one or a few layers. Therefore, developing technologies and devices based upon graphene’s unusual properties requires accurate determination of the layer thickness for materials under investigation. Raman spectroscopy can be employed to provide a fast, non-destructive means of determining layer thickness for graphene thin films.<h4>Instrument considerations&nbsp;</h4>There are a few specifications that should be considered when selecting a Raman instrument for graphene characterization. First, since graphene samples are usually very small, selecting a Raman instrument with microscopy capabilities is imperative.The next issue to consider is which excitation laser to select. While graphene measurements can be made successfully with any of the readily available Raman lasers, it is also important to consider the substrate that the graphene will be deposited onto. It is common for graphene to be deposited on on either Si or SiO2 substrates, and both of these materials can exhibit fluorescence with near-infrared (NIR) lasers such as 780 nm or 785 nm. For this reason, visible lasers are usually recommended, typically a 633 nm or 532 nm laser.&nbsp;Next, since relatively small wavenumber shifts can significantly impact the interpretation of the Raman spectra, it is crucial to have a robust wavelength calibration across the entire spectrum. Using a single point wavelength calibration with some other applications may be sufficient, but this only ensures that one wavelength is calibrated and leaves room for a large margin of error. A multipoint wavelength calibration that is regularly refreshed, such as the standard calibration routine used with <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products?category=184&amp;manufacturerItems=3&amp;search=dxr3">Thermo Scientific DXR3 Raman instruments</a>, will provide considerably more confidence in the results. It is also necessary to have an instrument with high wavenumber precision to observe small wavenumber shifts when altering the sample. In fact, small wavenumber shifts can represent changes in the sample rather than represent the variability from the instrument. There is a common myth that it is necessary to utilize high resolution in order to achieve high wavenumber precision. Not only is this incorrect, but a high resolution will actually add considerable noise to the spectrum, which will add to the wavenumber variability. A high degree of wavenumber precision, such as that provided by the <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/products/2239">Thermo Scientific™ DXR™3 Raman Microscope</a>, will significantly improve data confidence even when you are evaluating band shifts from low levels of strain or doping. It is also important to have exact control of your laser power at the sample and be able to adjust that laser power in small increments. This is important to control temperature-related effects and to provide flexibility to maximize Raman signal while still avoiding sample heating or damage from the laser. The DXR3 Raman systems are equipped with a unique device called a laser power regulator, which maintains laser power with unprecedented accuracy and provides exceptional ability to fine-tune laser power and optimize it for each experiment.1&nbsp;Lastly, the Raman microscope must have an automated stage and associated software to generate detailed Raman point maps. As will be seen in the next section, Raman point mapping or imaging extends the single point measurement to assess a sample’s layer thickness uniformity. The Thermo Scientific OMNIC™ Software suite contains powerful mapping and processing tools that diminish the complexity of collecting highly detailed maps and interpreting their results.<h4>Conclusions&nbsp;</h4>Raman spectroscopy is an excellent tool for the characterization of graphene and layer thickness. Few techniques will provide as much information about the structure of graphene samples as Raman spectroscopy, and any lab doing graphene characterization without Raman would be at a significant disadvantage. The DXR3 Raman Microscope is an ideal Raman instrument for graphene characterization because it can provide the high level of stability, control, and sensitivity needed to produce confident results.<h3>4. Waters Corporation: See What’s Really in Your Formulation with Backgrounded Membrane Imaging</h3><ul><li>Application note</li><li><a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/labrulez-bucket-strapi-h3hsga3/720009098_en_5d36d71789.pdf">Full PDF for download</a></li></ul>Protein aggregation in therapeutic protein products can induce adverse immunogenic responses in patients1–4 . Per the FDA’s recommendations, “strategies to minimize aggregate formation should be developed as early as feasible in product development”5 and “an assessment should be made of the range and levels of subvisible particles (2–10 µm) present in therapeutic protein products initially and over the course of the shelf life”.5 Yet, accurate subvisible protein aggregation analysis has remained elusive to protein drug formulators since current subvisible analyzers are not sensitive enough to measure protein aggregates effectively. In this application note, we explore how backgrounded membrane imaging (BMI), a high refractive index contrast technique used by the HORIZON particle analysis system, performs highly sensitive measurements of subvisible protein aggregates in the 2 µm–4 mm size range, enabling 30% higher reproducibility compared to flow imaging.<h4>Conclusion&nbsp;</h4>When studying the impact of protein aggregate refractive index, IgG protein aggregates analyzed on both the <a target="_blank" rel="noopener noreferrer" href="https://icpms.labrulez.com/library?mainauthorItems=5&amp;search=HORIZON">HORIZON® instrument</a> and flow imager systems produced equivalent particle count trends. However, the HORIZON® system was more sensitive (measured more overall counts) and had overall lower variability with average CVs of 14.4% compared to the flow imager which produced average CVs of 20.1%. The differences in variability and counts were most pronounced at lower concentrations and size range respectively. Given that most particles in a therapeutic drug formulation are small, the inability of flow imagers to accurately count the smallest of protein aggregates has a dramatic impact on the total number of particles measured. This can mean an undercounting by as much as 3–10X depending on the protein and formulation conditions.&nbsp;High variability at low concentrations in flow imagers can pose a hurdle for early stage analysis were sample is scarce. In low volume analysis (&lt;250 µL), the possibility of measuring fewer particles increases, therefore it is imperative to have high sensitivity measurements when already challenged by low sampling statistics.&nbsp;In the excipient effect study, sucrose did not have an impact on the overall particle counts when measured using the HORIZON® system. This contrasts with previous studies comparing excipient effects on three flow imagers.10 In each case, the particle counts decreased up to 30% or more using standard sucrose formulation concentrations of 0–20%. The difference between the data generated by BMI and FI can be attributed to the fact that the HORIZON® instrument is not affected by particle or solution refractive index.&nbsp;Flow imagers are deeply vulnerable to the impact of refractive index when measuring protein aggregates due to their translucency and the negative impact of surfactants. Due to this basic optical phenomenon, flow imagers can dramatically undersize and undercount particles. Finding the right tool for the job will have a critical impact on data accuracy and sensitivity. Powered with BMI, the HORIZON® system provides high refractive index contrast analysis to enable accurate, robust, and sensitive subvisible particle counting from 2 µm–4 mm in as little as 25 µL of sample and 96 samples in under 2 hours.

News from LabRulezICPMS Library - Week 15, 2026

The set of soils consist of two natural agricultural soils differing in elemental composition&nbsp;<ul><li>AN-ZP01: Heavy loam with normal analyte levels&nbsp;</li><li>AN-ZP02: Silty clay loam contaminated with some heavy metals&nbsp;</li></ul>Contents of element extractable fractions with aqua regia according to ISO 11466&nbsp;<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_agricultural_soil_CRM_0534e68e65.jpg" alt="ANALYTIKA: Matrix CRM of agricultural soil METRANAL® CRM AN-ZP01 and AN-ZP02" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_agricultural_soil_CRM_0534e68e65.jpg 156w," sizes="100vw" width="827" height="827"><h5>Packing:&nbsp;</h5><ul><li>50 g of powder of the respective soil with a particle size of less than 100 µm in amber glass bottle.&nbsp;</li></ul><h5>Intended use:&nbsp;</h5>This set of certified reference materials is intended primarily for use in realizing metrological traceability, validation of analytical methods and the transfer of property values to other materials of similar composition.&nbsp;<h5>Recommended analytical methods for method dependent measurements:</h5><ul><li>Flame AAS, ETA-AAS, ICP-OES, ICP-MS, AMA-254&nbsp;</li></ul><h5>Metrological traceability:&nbsp;</h5>Metrological traceability is realized by using certified calibration standards solutions for the calibration of measurement methods used (direct traceability to SI unit) and/or by simultaneous analysis of a matrix CRM (RM) of similar composition.<h5>Sample preparation (aqua regia extract according to ISO 11466):&nbsp;</h5>Weigh a 3 g (± 0.001 g) sample into a 100 ml round bottom flask. Add a small amount of water (2 to 3 ml) to obtain a slurry, then 7.5 ml of conc. HNO3 (density 1.40 g/ml). Let the mixture stand until intensive foaming ceases, then add (in several portions) 22.5 ml of conc. HCl (density 1.19 g/ml), shake the mixture manually, cover the flask with a watch glass, and let stand for 16 hours (overnight) at the laboratory temperature (20 ± 2°C). Then mount a reflux condenser (a Dimroth type or similar) of about 40 cm length on the top of the flask and boil gently under reflux for 2 hours. After cooling, rinse the condenser with 20 ml of warm (~ 50°C) dilute nitric acid (5%, v/v), the liquid being collected in the round bottom flask. Remove the condenser and filter the solution from the flask through an acid-resistant high density paper filter and collect it in a 100 ml volumetric flask (make sure in preliminary tests that a suitable filter was chosen, so that the filtrate is clear). Rinse the filter and the residue three times with 5 ml of warm (~ 50°C) dilute nitric acid (5%, v/v); allow to cool and dilute with nitric acid 5% (v/v) to the mark. Transfer immediately the solution from the volumetric flask into a clean, dry 100 ml polyethylene bottle. Realize three blanks using exactly the same analytical procedure.&nbsp;It is acceptable to realize the operation described above in a glass beaker covered with a watch glass. Minimum sample size for analysis is defined with the prescribed working procedure.&nbsp;<h5>Storing and instruction for use:&nbsp;</h5>These CRM have to be stored in original bottle and between 5-30°C (in a dark and dry place). The materials should be analysed in the "as received" state and their dry weight should be determined on non-analysed aliquots oven-dried at 105°C till the constant weight. The material in the bottle must be rehomogenized before each use by mechanical shaking of the content for 1-2 minutes. The bottle should be opened a minimum of 2 minutes after rehomogenization in order to prevent an escape of fine powder particles from the bottle into the environment and their sedimentation.&nbsp;<h5>Certified and indicative values and their uncertainties:&nbsp;</h5>The certified and indicative values of extractable element fraction are summarized in Table 1. The overall means evaluated have been given a status of certified and indicative values using the following criteria: data should be available from at least two independent analytical methods, at least 5 and 3 accepted laboratory means should be available for calculation of the overall mean for certified and indicative value, respectively. At combined uncertainties presented, the contribution of uncertainty of characterization of a particular property value is dominant.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Table_1_Certified_and_indicative_values_of_contents_of_element_fractions_extractable_by_f56fa06aa5.jpg" alt="ANALYTIKA: Table 1 - Certified and indicative values of contents of element fractions extractable by aqua regia in CRM AN-ZP01 and AN-ZP02 and their associated uncertainties." srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Table_1_Certified_and_indicative_values_of_contents_of_element_fractions_extractable_by_f56fa06aa5.jpg 187w," sizes="100vw" width="998" height="835"><h5>Chemical composition of soil matrix:&nbsp;</h5>The bulk composition of CRM AN-ZP01 and AN-ZP02 is shown in Table 2. The values presented in this table are not certified, but they may be useful for considerations concerning possible interferences while determining analytes given in Table 1, and for selection of suitable decomposition procedures if destructive analytical methods are to be used.<img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Table_2_Matrix_composition_of_CRM_AN_ZP_01_and_AN_ZP_02_of_the_oxides_dry_cd1273cf9c.jpg" alt="ANALYTIKA: Table 2 Matrix composition of CRM AN-ZP01 and AN-ZP02 (% of the oxides dry weight at 105°C)" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Table_2_Matrix_composition_of_CRM_AN_ZP_01_and_AN_ZP_02_of_the_oxides_dry_cd1273cf9c.jpg 170w," sizes="100vw" width="883" height="811"><h5>Note:&nbsp;</h5>Detailed information about the production, homogeneity testing and characterization of these CRM are described in the Certification report, which is available on request.

Matrix CRM of agricultural soil METRANAL® CRM AN-ZP01 and AN-ZP02

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<div><div id="inner_content_body_text" data-content-id="394785">Humidity plays a crucial role in determining the behavior and performance of polymeric and soft materials. This webinar explores how varying levels of humidity influence material responses such as rheology, tackiness, and tribological behavior.Through controlled humidity experiments, the session demonstrates how water absorption and desorption alter material properties like modulus, viscosity, curing, and flowability of different materials. Case studies will include practical examples across diverse applications, such as polymer films, adhesives, food products, powders, and coatings. Humidity is shown to have both reversible and irreversible effects on the softening of gelatin and tackiness of chewing gum to the curing of silicone sealants, and flowability of powders.Participants will gain insights into how humidity affects product performance, shelf life, and processing—leading to better design, formulation, and quality control in research and industrial applications<blockquote>Presenter: Mohammed Naimul Hoque, PhDMohammed Naimul Hoque is an Advanced Application Engineer – Rheology at Anton Paar USA, specializing in the rheological characterization of complex fluids and colloids. His work involves customer sample testing, collaborating with academic and industrial clients, and providing training on rheological instruments and techniques.Prior to joining Anton Paar, Naimul earned his PhD in Mechanical Engineering from Texas Tech University, where his research focused on modeling the flow behavior of colloidal dispersions and predicting their extrusion behavior using extensional rheological techniques, such as dripping-onto-substrate (DoS) rheometry.</blockquote></div></div>

Anton Paar: Polymer Rheology: Impact of Humidity on Material Behavior

Polymer Rheology: Impact of Humidity on Material Behavior

Explore the effects of humidity on polymers and soft materials, including rheology, tackiness, curing, and flowability, with practical case studies.

Impact of Humidity on Material Behavior

<h4>Food &amp; Feed Sample Preparation Webinar Series</h4>Ensuring food and feed quality requires reliable determination of both contaminants and nutrients, yet sample preparation remains one of the most challenging and time-consuming steps in the analytical workflow. This webinar series introduces modern approaches to digestion and extraction that improve data quality, reduce reprocessing, and increase laboratory productivity. Through four dedicated events, covering heavy metals, organic contaminants, macro/trace minerals, and nutritional parameters such as fats, FAMEs, and amino acids, participants will discover optimized, practical workflows tailored to real-world food and feed testing.<h4>Session: Heavy Metals in Food: Digestion Strategies and Complete Sample Prep Workflow</h4>Heavy metals such as Pb, Cd, As, and Hg are strictly regulated in food and feed, requiring robust digestion and a well-controlled sample preparation workflow. This webinar covers best practices for microwave digestion of diverse food matrices using systems such as ETHOS and ultraWAVE 2 eco. A case study on baby food will illustrate common challenges such as matrix complexity, contamination control, and blank management. Participants will learn how to build a reliable sample-to-analysis workflow that ensures accuracy, reduces re-runs, and supports regulatory compliance.<blockquote>Speaker: Giulio Colnaghi (Marketing Manager, Milestone Srl)</blockquote>

Milestone: Food & Feed Sample Preparation Webinar Series

Heavy Metals in Food: Digestion Strategies and Complete Sample Prep Workflow

This webinar covers best practices for microwave digestion of diverse food matrices using systems such as ETHOS and ultraWAVE 2 eco. 

Digestion Strategies and Complete Sample Prep Workflow

<div><div container-id="cq-colctrl-lt0" comp-id="A1"><div>This webinar will focus on the importance of carbon and nitrogen determination in adhesives, laminates, and cement fiber board used in construction and engineered wood products. Attendees will learn how elemental analysis supports resin formulation, quality control, and performance optimization, particularly for urea-formaldehyde–based systems where elemental ratios directly impact strength, durability, and emissions.The session will cover combustion-based analytical techniques for measuring carbon and nitrogen across a wide range of sample types, including liquids, viscous resins, and heterogeneous composites. Instrument operation, calibration strategies, and practical sample preparation approaches will be discussed to help laboratories achieve accurate, precise, and repeatable results.In addition, the webinar will address carbon determination in cement fiber board and explain how carbon content reflects cellulose and wood pulp additions that influence flexibility, weight, and consistency. Real-world examples will demonstrate how elemental analysis data can be used to support manufacturing consistency and regulatory compliance.<blockquote>Presenter: Fred Schultz (Former Application Chemist, LECO)</blockquote></div></div></div>

LECO: Carbon and Nitrogen Determination in Adhesives, Laminates, and Cement Fiber Board

Carbon and Nitrogen Determination in Adhesives, Laminates, and Cement Fiber Board

Webinar on carbon and nitrogen elemental analysis for adhesives and cement fiber board quality control and performance optimization.

Carbon and Nitrogen Determination in Adhesives, Laminates

<div><div container-id="cq-colctrl-lt0" comp-id="A1"><div>This webinar presents an integrated characterization approach for lithium‑ion battery materials, covering elemental chemistry with electrode microstructure from anode to cathode.Attendees will learn about multiple different analyses that can be applied to graphite, lithium iron phosphate (LiFePo4), and lithium nickel manganese cobalt oxide (NMC) materials, including thermogravimetric analysis, combustion-based Carbon and Sulfur analysis, and inert gas fusion for Oxygen and Nitrogen analysis.The session also covers metallographic analysis of electrodes on thin Copper and Aluminum foils to support process control and performance optimization.<blockquote>Presenter: Aaron Walczewski (Director of Product, LECO Corporation)Presenter: Ariyona Palmer (Application Scientist, LECO Corporation)Presenter: Lauren Heirty (Application Scientist, LECO Corporation)</blockquote></div></div></div>

LECO: From Anode to Cathode: Integrated Characterization Solutions for Advanced Battery Materials

From Anode to Cathode: Integrated Characterization Solutions for Advanced Battery Materials

This webinar presents an integrated characterization approach for lithium‑ion battery materials

Solutions for Advanced Battery Materials

<div><div container-id="cq-colctrl-lt0" comp-id="A1"><div>The webinar “TOC Determination in Soil and Waste” provides a comprehensive overview of current analytical possibilities for the determination of TOC400, TIC900, ROC, TIC, and TOC in solid environmental samples. Total Organic Carbon (TOC) analysis plays a key role in the assessment of soils and waste materials, as it is an important indicator of organic matter content, environmental impact, and regulatory compliance. Reliable TOC data are essential for waste classification, landfill acceptance, soil quality evaluation, and environmental monitoring.During the webinar, results obtained using different standardized methods will be presented and critically compared. This includes ISO EN 17505, which is based on temperature separation, as well as EN 15936, which applies acid treatment for inorganic carbon removal prior to TOC determination. The strengths, limitations, and typical application areas of these methods will be discussed, with a focus on how methodological choices can influence analytical results and data comparability.In addition to the methodological aspects, the webinar will offer a concise overview of suitable LECO instruments for TOC analysis in soil and waste samples. Instrument design, analytical performance, and practical considerations for routine laboratory use will be highlighted to support users in selecting the most appropriate solution for their specific analytical requirements.<blockquote>Presenter: Michael Jakob (Elemental Field Product Manager)</blockquote></div></div></div>

LECO: TOC Determination in Soil and Waste

TOC Determination in Soil and Waste

TOC analysis in soils and waste covering ISO and EN methods, instrument selection, and data comparability for environmental and regulatory workflows.

The analysis of high matrix samples like soils and sediments by ICP-MS can be challenging and time-consuming, especially for laboratories with a high sample load. The multi-element measurement capability of ICP-MS means that analysts can quantify many elements in a sample. However, determining a large suite of elements typically requires the analyst to prepare multiple suitable calibration standards for those elements. Also, given the complexity and high total solids content of some environmental samples, a lot of analyst time is needed to prepare the samples for analysis. Once prepared, analysts may need to further dilute the samples to ensure that all elements are measured within the calibration range, which takes more time and resources disrupting the analytical workflow. This presentation will discuss the advantages and enhancements of MH 5.4 and the Agilent ADS2/AVS system for routine analysis.<blockquote>Presenter: L. Craig Jones (ICP-MS Application Scientist, Agilent Technologies, Inc.)Craig has been with Agilent for over 15 years as an ICP-MS applications scientist. He has been involved with multiple type of applications for ICP-MS, including environmental, pharmaceutical, semiconductor, geologic, and clinical analyses, to name a few. Previous to Agilent he worked in an environmental lab performing analysis and supervising both the inorganic and organic sections of the laboratory. In his spare time, Craig enjoys volunteering at the local marine science center, mountain biking, hiking, and relaxing at the beach. Craig obtained a Bachelor of Science degree in chemistry from Fort Lewis College in Durango, CO.</blockquote>

Agilent Technologies: Atomic Spectroscopic webinars

Improve your ICP-MS productivity and workflow with the ADS2/AVS

Webinar on optimizing ICP-MS analysis of high-matrix samples using MassHunter 5.4 and ADS2/AVS, focusing on calibration efficiency and streamlined workflows.

ICP-MS productivity and workflow with ADS2/AVS

FTIR spectroscopy is a powerful analytical technique that connects molecular vibrations to practical chemical measurements. In this webinar, we review the fundamentals of FTIR spectroscopy, including how infrared absorption arises from molecular structure, why IR spectra provide unique chemical fingerprints, and how quantitative information can be extracted using Beer–Lambert–based calibration with carefully selected spectral bands. These core concepts form the foundation for applying FTIR reliably to complex chemical systems, including aqueous samples, using the Agilent Cary 630 FTIR spectrometer.&nbsp;The webinar then transitions to the practical challenge of measuring oil and grease in water—an important requirement for wastewater, process water, and environmental monitoring. ClearShot™ Extraction Technology, developed by OSS Maine, provides a cost-effective, safe, and accurate approach for quantifying total oil and grease without the use of hazardous solvents. When paired with FTIR analysis, this workflow enables rapid measurements across a wide concentration range, supporting efficient, reliable water analysis.<blockquote>Presenter:&nbsp; Yanqia Wang, PhD (Application Engineer, Molecular Spectroscopy, Agilent Technologies, Inc.)Dr. Yanqia Wang started working for Agilent Technologies Inc. as a FTIR application Engineer in 2013, providing pre-&amp;post-sale application support. The products he covers from Bench-top FTIR microscopes to various Mobile FTIR spectrometers. Dr. Wang received his PhD of analytical chemistry from Duke University in 2004, doing dynamic IR spectroscopy research. Then he joined Fitzpatrick Center for Photonics at Duke University, doing Tissue Raman spectrometer instrumentation. Since 2007, Dr. Wang worked for Avery Dennison Corp. as a spectroscopist, providing molecular analytical support to the research &amp; development.</blockquote>

Agilent Technologies: Molecular spectroscopy webinars

FTIR in Action: From Spectroscopy Fundamentals to Oil and Grease Analysis in Water

Webinar on FTIR fundamentals and oil & grease analysis in water using ClearShot™ extraction and Agilent Cary 630 for rapid, reliable environmental testing.

FTIR Fundamentals & Oil and Grease Analysis in Water

This workshop will review the different substrates used for microplastics analysis and will focus on best practices for sample measurement and sotware functions in Clarity software for the analysis of microplastics.<blockquote>Presenter:&nbsp; Louis Tisinger, PhD (Application Engineer, Molecular Spectroscopy, Agilent Technologies, Inc.)Louis (Lou) Tisinger has a Ph.D. in Analytical Chemistry from Miami University in Oxford Ohio, where his graduate research involved the study of ATR imaging and microscope performance in vibrational spectroscopy. Most of his career has been related to pre- and post-sales support of FTIR spectrometers, microscopes, imaging systems, and thermal analytical instruments, focusing on analyzing customer samples, demonstrations, post-sales training, troubleshooting, and R&amp;D.</blockquote>

A Workshop on Substrates and Software tools for Microplastics Analysis using the LDIR

This workshop will review the different substrates used for microplastics analysis and will focus on best practices for sample measurement and sotware functions

Software tools for Microplastics Analysis using LDIR

Direct Lithium Extraction (DLE) selectively recovers lithium from underground brines, producing high-purity lithium salts for batteries. Accurate analysis of major and trace elements is essential for quality control, but high dissolved solids and wide analyte ranges make lithium brines challenging to analyze. In this seminar, an Agilent 5900 ICP-OES with the Advanced Dilution System 2 (ADS 2) quantified key elements in different brine samples from DLE (raw, tail and lithium concentrate). The method demonstrated excellent matrix tolerance, long-term stability, and reliable elemental profiling, supporting robust quality control throughout the DLE workflow.<blockquote>Presenter: Ana García González (Atomic Spectroscopy Application Scientist, Agilent Technologies)Ana Garcia is the Atomic Spectroscopy Application Scientist at Agilent Technologies. Ana has a broad background in atomic spectroscopy technologies, including international experience developing and validating analytical spectroscopy methods for the geochemical industry. She has also published in the fields of molecular spectroscopy and chemometrics. Ana holds a MSc in plant Biotechnology at CINVESTAV, México, and a Bachelor of Science in Biotechnology Engineering.</blockquote>

High-Throughput ICP-OES Analysis of Elements in Brines from Direct Lithium Extraction

Learn how ICP-OES and advanced dilution improve elemental analysis of lithium brines in Direct Lithium Extraction for reliable quality control.

ICP-OES Analysis of Elements in Brines

To match the demand of the increase of food testing in various laboratories, a reliable automatic calibration and dilution sample introduction system is employed in the elemental analysis of food products by ICP-MS. The new sample introduction system combines calibration preparation, pre-dilution and reactive re-dilution of samples into one simple step during method setup. This simplifies the operation and analysis, which minimizes contamination and human error, ensures accuracy and traceability, in addition to enhancing lab personnel training. In addition, to ensure accuracy of the results, half mass correction is employed to combat the common doubly charge interference by rare earth metals. This presentation will discuss the mechanics of this sample introduction system, as well as results obtained by ICP-MS.<blockquote>Presenter: Yan Cheung, PhD (Application Scientist, Agilent Technologies, Inc.)Yan received her Ph.D. in Analytical Chemistry from Indiana University Bloomington. She joined Agilent Technologies as an Application Scientist in the Life Science and Chemical Analysis team in April 2020. Yan has extensive experience in operating and method development in ICP-MS. Yan also has years of experience working in the oil and gas industry.</blockquote>

What have you been smoking? Elemental Analysis in Cannabis and Cannabis Products with ICP-MS

Discover how automated calibration and dilution improve ICP-MS food testing accuracy, efficiency, and interference control for reliable elemental analysis.

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