<h4><strong>Description and use:</strong></h4>
<p>These reference materials are aqueous calibration solutions of individual elements and ions with certified/assigned concentration value in the range from 1 mg/l to 10 g/l or 1mg/kg to 10g/kg (m/m) and aqueous calibration solutions of combinations of elements and/or ions with certified/assigned concentrations at various levels relevant to particular analytical requirements. They can be used by analytical techniques analysing aqueous solutions such as atomic spectrometry (<a href="https://icpms.labrulez.com/library?instrumentationItems=85"><strong>AAS</strong></a>, AFS, <a href="https://icpms.labrulez.com/library?instrumentationItems=84"><strong>ICP-OES</strong></a>, <a href="https://icpms.labrulez.com/library?instrumentationItems=83"><strong>ICP-MS</strong></a>), molecular absorption spectrometry, ion chromatography and some selected electroanalytical methods.</p>
<h4><strong>Starting primary substances and other applied materials:</strong></h4>
<p>Metals or compounds (in mass calculated from the content of the certified component and a target volume of the batch) are used as starting materials for the production of these RM. High purity metals with a declared assay of minimum 99.95 % are preferred and compounds of a defined and constant stoichiometry and declared assay and/or impurities content are used when a suitable metal is not available [1, 2]. The supplier of primary substances must comply with ISO 17034 [3], namely to employ a certified Quality Management System. Each supply of the primary substance must be accompanied with complete documentation, including an identification of sources and treatment, assay and impurity contents. As required by this Guide, the supplier’s data are verified by the CRM producer and by other subcontracted accredited laboratories (e.g. trace metal impurities by spectroscopic methods such as ICP-AES, ICP-MS, AAS, the assay by primary gravimetric or volumetric methods).</p>
<p>Acids (prepared by sub-boiling distillation), other ultrapure chemicals (ammonium hydroxide, hydrogen peroxide, etc.) and deionised water with a resistivity 18 MΩ.cm are further applied in the (C)RM preparation. Their impurity contents are regularly monitored. They are generally negligible (~ 1 μg/l) as compared with the concentration of the certified/assigned constituent.</p>
<h4><strong>Weighing, volume and temperature measurement:</strong></h4>
<p>A class 1 electromechanical analytical balances with a valid verification is used to weigh the primary substances. A performance of this balance is regularly controlled by the Czech Metrology Institute. Mettler weights class F1 (5 g and 100 g) are used for an internal calibration control. Two calibrated mercury or alcoholic thermometers 0 – 50 °C (with a scale division by 0.1 °C), regularly calibrated by authorized institutions are used for the temperature measurement.</p>
<p>All volumetric vessels used (flasks, pipettes, burettes) are of Accuracy Class 1, calibrated by their producers and delivered with a relevant certificate. The calibration of all labware is regularly checked.</p>
<h4><strong>Coding and packaging:</strong></h4>
<p>(C)RMs are delivered in amber HDPE bottles or amber glass bottles whenever an interaction of the analyte with HDPE may be suspected (e.g. mercury, precious metals). Prior to filling, the bottles and caps are leached by HCl (5% v/v) for a longer period, washed repeatedly with deionised water and thoroughly dried. The bottle filled with (C)RM is hermetically closed with a polypropylene screw cap and tightened with parafilm immediately after filling and sealed into reclosable aluminium bag or PE foil. The bottle is labelled with a resistant plastic label containing all data as required by (C)RM standards, i.e. (C)RM and batch codes, volume of the packed unit, type of the matrix, producer identification and contact data, further data and warning symbols when required by specific regulations [4, 5].</p>
<h4><strong>Homogeneity and stability:</strong></h4>
<p>The (C)RM are considered homogeneous due to their physico-chemical character (diluted solutions) and thus a detailed homogeneity testing is not required. This fact is supported by a long-term experience of the producer and other recognized producers of similar materials. In compliance with a recommendation of ISO 17034, homogeneity testing is performed (as prescribed in ISO Guide 35) at randomly chosen solutions and evaluated by ANOVA. </p>
<p>An assumption of stability and the consequent expiration period is based on both over 20 year experience with the preparation of similar RMs and a test of possible instability factors. These factors are of general (e.g. water evaporation by regular weighing of the filled bottle) and specific character (e.g. adsorption and desorption of the particular analyte on the walls of the bottle, precipitation, etc.).</p>
<p>Along with these tests the content of the certified/assigned constituent in the bottle is compared (at least twice during the validity period) with that of a newly prepared batch and/or a corresponding (C)RM form other producers. For these comparisons, both primary analytical methods (gravimetry, titrimetry) and some instrumental methods (ICP-OES, AAS) working in the regime of maximum precision (the application of internal standard, bracketing technique etc.) are used. For selected analytes, an accelerated isochronous stability test (in the temperature range of -20 °C to +40 °C) is realized. Based on these tests, transport conditions for a particular (C)RM are defined.</p>
<h4><strong>Certification, certified and assigned value and their uncertainties:</strong></h4>
<p>The concentration value of CRM/RM are certified/assigned on the basis of gravimetric preparation (refering to ISO Guide 35), i.e. on weighing and volume measurement [6]. They are calculated from an assay of the certified constituent in the primary substance, declared by its supplier and duly verified by the CRM producer. The certified/assigned concentration (m/v) and its uncertainty are expressed in g/l (alternatively in mg/kg) at a temperature of 20 ± 0.1 °C.</p>
<p>The uncertainty of the certified/assigned values is estimated in compliance with ISO and EURACHEM methodologies [7, 8]. It combines the calculated standard uncertainties of the individual CRM/RM preparation steps with an expert estimate of the standard uncertainty of the assay of the certified constituent in the primary substance, usually a dominant contribution. The expanded combined uncertainty calculated using coverage factor k = 2 is expressed as a two-sided half-interval by one significant figure, with the certified value given by the same number of digits.</p>
<p>The particular certified values and uncertainties, mostly at a level of 0.2% (rel.), are specified in the Certificate together with the expiry terms and other relevant information.</p>
<p>The particular assigned values and uncertainties, mostly at a level of 0.5% (rel.), are specified in the Identification sheet together with the expiry terms and other relevant information.</p>
<p>The certified/assigned analyte concentration and its uncertainty is further experimentally verified by means of primary and instrumental analytical methods [9]. However, the results received are not used in the calculation of the certified/assigned value and serve only for the confirmation that this value is true.</p>
<h4><strong>Traceability and quality assurance:</strong></h4>
<p>Direct traceability to SI unit for the weight (1 kg) is secured by using a primary substance within comprehensively verified content of the analyte constituent and by gravimetric method of preparation. This traceability is for each produced batch of (C)RM further confirmed by analytical data acquired from the determination of certified analyte with validated primary and instrumental analytical methods. Only internationally accepted references (SRM NIST, TraceCERT etc.) are used.</p>
<p>The producer operates a certified quality management system ISO 9001 [10] and is accredited according to ISO 17034 [12].</p>
<p>Control analytical laboratory of the producer is accredited according to ISO/IEC 17025 [11].</p>
<h4><strong>Storing and instructions for use:</strong></h4>
<p>This (C)RM must be stored in the original closed bottle (in an upright position) between 5 °C and 30 °C, away from any strong light sources (e.g. sunshine, UV lamp). The producer guarantees declared life time (shelf life) and expiration time (period of validity) provided (C)RM is properly stored and professionally handled. The temperature of the bottle with (C)RM must be 20 ± 0.5 °C before every use. After use, the bottle must be immediately tightly capped. It is recommended to tighten the screw cap with parafilm Do not pipette from the bottle. Do not return removed aliquots to bottle. The user should differentiate between the life time (shelf life) of the particular (C)RM (usually 5 years from the date of production) and expiration time (never more than 24 months from the first opening of the bottle). Both values are presented in the Certificate and Identification sheet. It is necessary to indicate on the Certificate/Identification sheet the date of the first opening of the bottle or aluminium bag and the expiration time, which depends on the date of the first opening. It is necessary to indicate the expiration time on the label of the bottle too.</p>
<p>It is not recommended to use the standard solution when the bottle contains less than 10 % of the solution. Therefore, in case of opaque bottle, it is important to indicate the amount of the solution used, e.g. on the label.</p>
<p>Transpiration through amber HDPE bottles (losses of the solution mass resulting in a gradual increase in the analyte mass fraction) was not observed. It is the producer’s experience that the loss of vapour phase occurs solely around the screw cap of the bottle which is not airtight. Therefore, it is recommended to cover the screw cap and the neck of the bottle with parafilm layer after each opening and put the bottle into the reclosable aluminium bag, if it is delivered in.Safety regulations for transportation, storage, and use of this (C)RM are specified in the respective Safety Data Sheet.</p>


Detailed information about the production of aqueous calibration solutions Astasol®

<p><strong>Multielement certified material in nitric acid and hydrofluoric acid. CRM Mix 23 elements 100mg/l ea., in 5% Nitric acid + 0.2% Hydrofluoric acid, HDPE, 100 ml.</strong></p><h5><strong>All variations</strong></h5><ul><li><strong>30 ml</strong> - <span class="no-price">Contact us for a price</span></li><li><strong>50 ml</strong> - <span class="no-price">Contact us for a price</span></li><li><strong>100 ml</strong> - <span class="no-price">Contact us for a price</span></li><li><strong>250 ml</strong> - <span class="no-price">Contact us for a price</span></li><li><strong>500 ml </strong>- <span class="no-price">Contact us for a price</span></li><li><strong>3 x 30 ml</strong> - <span class="no-price">Contact us for a price</span></li></ul><h4><strong>Intended use:</strong></h4><p>For calibration and validation of analytical methods analysing aqueous solutions such as atomic spectrometry (AAS, AES, ICP-OES, ICP-MS), molecular absorption spectrometry and selected electroanalytical methods.</p><ul><li>Product code: AN9094MFN</li><li>Concentration: 100 mg/l</li><li>Matrix: HNO<sub>3</sub> + HF</li><li>Number of elements: Multi-element<br>Type: CRM</li><li>Volume: 100 ml</li><li>Analytes: As, Be, Ca, Cd, Co, Cr, Cu, Fe, Li, Mg, Mn, Mo, Ni, P, Pb, Sb, Se, Sn, Sr, Ti, Tl, V, Zn</li><li>Expiry: 12 months</li><li>Matrix concentration: 5 % + 0.2 %</li><li>Package: HDPE</li><li>Shelf life: 36 months</li></ul><h4><strong>Starting primary compounds and theirs purities (%):</strong></h4><p>As 99.9999; BeO 99.98; CaCO<sub>3</sub> 99.999; Cd 99.999; Co 99.998; Cr(NO<sub>3</sub>)<sub>3</sub> . xH<sub>2</sub>O 99.99; Cu 99.999; Fe 99.998; Li<sub>2</sub>CO<sub>3</sub> 99.999; Mg 99.98; Mn 99.98; Mo 99.95; Ni 99.995; NH<sub>4</sub>H<sub>2</sub>PO<sub>4</sub> 99.999; Pb 99.999; Sb 99.999, Se 99.995; Sn 99.999; SrCO<sub>3</sub> 99.994; Ti 99.99; TlNO3 99.9995; NH<sub>4</sub>VO<sub>3</sub> 99.95; Zn 99.99</p><h4><strong>Matrix:</strong></h4><p>5% HNO<sub>3</sub> (v/v), prepared from sub boil distilled HNO<sub>3</sub> (ANALPURE®), 0.2% HF (v/v) prepared from sub boil distilled HF (ANALPURE®) and ultrapure demineralized water (resistivity ≥ 18 MΩ.cm, 0.22μm filtered).</p><h4><strong>Certification and traceability:</strong></h4><p>This CRM is certified on the basis of gravimetric preparation. This procedure also ensures a direct traceability to SI unit – kg. Certified values, uncertainties and traceability were further verified by primary analytical methods (gravimetric, titrimetric) as well as by instrumental methods (AAS, AES, ICP-OES) calibrated with independent reference solutions (e.g. SRM NIST, TraceCERT, in-house solid and liquid CRMs). Analytical methods and references used are listed in the following table.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Analytika_Certification_and_traceability_ASTASOL_AN_9094_MFN_80eb36f0b2.jpg" alt="Analytika: Certification and traceability ASTASOL AN9094MFN" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Analytika_Certification_and_traceability_ASTASOL_AN_9094_MFN_80eb36f0b2.jpg 206w," sizes="100vw" width="1182" height="895"></p><h4><strong>Trace impurities in bottled solution (in mg/l):</strong></h4><p>Determination of trace impurities was performed by AAS, ICP-OES and ICP-MS. Impurity levels are supplied only for information of the user and should not be used as calibration data.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/Analytika_Trace_impurities_in_bottled_solution_in_mg_l_ASTASOL_AN_9094_MFN_7ed86f33d1.jpg" alt="Analytika: Trace impurities in bottled solution (in mg/l) ASTASOL AN9094MFN" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_Analytika_Trace_impurities_in_bottled_solution_in_mg_l_ASTASOL_AN_9094_MFN_7ed86f33d1.jpg 245w," sizes="100vw" width="1182" height="613"></p><h4><strong>Homogeneity and stability:</strong></h4><p>It has been demonstrated that this CRM is homogeneous and its stability is guaranteed during the whole shelf life provided the solution it kept under conditions presented below.</p><h4><strong>Storing and instruction for use:</strong></h4><p>This CRM must be stored in the original closed bottle between 5 – 30 °C. The producer guarantees a declared shelf life and expiration time provided the CRM is properly stored and professionally handled. The temperature of the solution must be 20 ± 0.5 °C before every use. It is necessary to indicate on this certificate and the label the expiration time, which depends on the date of the first time the aluminium bag was opened. After use, the bottle must be immediately tightly capped, and it is recommended to put it back into the reclosable aluminium bag. It is not recommended to use the standard solution when the bottle contains less than 10 % of the solution. Therefore, in case of non-transparent bottle, it is important to indicate the amount of the solution used, e.g. on the label. Do not pipette from the bottle. Do not return removed aliquots to bottle.</p><h4><strong>Note:</strong></h4><p>Detailed information about the production, homogeneity, stability, coding, characterization and storing of this CRM are described in the document “Detailed information about the production of aqueous calibration solutions ASTASOL®“ which is available for download on the website <a target="_blank" rel="noopener noreferrer" href="https://www.analytika.net/">www.analytika.net</a>.</p><p>&nbsp;</p>

Multielement certified material (Mix 23 elements)

<h4><strong>Matrix certified reference material of sewage sludge - METRANAL® CRM AN-OK03</strong></h4><ul><li><strong>Analyte: </strong>Adsorbable organically bound halogens (AOX)</li><li><strong>Product code:</strong> AN-OK03&nbsp;</li><li><strong>Certified value of concentration and its expanded uncertainty (k = 2) AOX:</strong> 280 ± 13 mg/kg</li></ul><h5><strong>Packing:</strong></h5><p>40 g of powder of the respective sewage sludge with a particle size of less than 100 µm in amber glass bottle. The sample is stabilized by radiation of 25kGy.</p><h5><strong>Intended use:</strong></h5><p>This 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.</p><h5><strong>Recommended analytical methods:</strong></h5><p>Microcoulometry with argentometric titration or another appropriate methods</p><h5><strong>Metrological traceability:</strong></h5><p>Metrological traceability is realized by using certified calibration standard solutions for the calibration of measurement methods used and/or by simultaneous analysis of a matrix CRM (RM) of similar composition.</p><h5><strong>Sample preparation:</strong></h5><p>The most frequently methods used are following: EPA 1650, DIN 38414-18 or equivalent.</p><h5><strong>Homogeneity and stability:</strong></h5><p>Homogeneity and short term stability has been demonstrated according to the ISO GUIDE 35.</p><h5><strong>Storing and instruction for use:</strong></h5><p>This CRM has to be stored in original bottle. Storing between 2-10°C is recommended. The material should be analysed in the "as received" state and its dry mass should be determined on non-analysed aliquots oven-dried at 105°C till the constant mass. 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.</p><h5><strong>Note:</strong></h5><p>Detailed information about the production, homogeneity testing and characterization of this CRM are described in the Certification report, which is available on request.</p><p>Analytika®, spol. s r.o. will be monitoring this RM over the period of its validity. If substantive changes of certified values occur, Analytika® spol. s r.o. will notify the purchaser.</p>

Matrix certified reference material of sewage sludge METRANAL® CRM AN-OK03

<h4><strong>Matrix certified reference material of green tea METRANAL® CRM AN-BM02</strong></h4><p>Certified reference material of Chinese green tea AN-BM02&nbsp;</p><h5><strong>Packing:&nbsp;</strong></h5><p>30 g of powder of the green tea with a particle size of less than 200 µm in amber glass bottle.&nbsp;</p><h5><strong>Intended use:&nbsp;</strong></h5><p>This certified reference material is intended primarily for use in realizing metrological traceability, validation of analytical methods and the transfer of property values by total element contents to other materials of similar composition.&nbsp;</p><h5><strong>Recommended analytical methods for method dependent measurements:</strong></h5><p>Flame AAS, ICP-OES, ICP-MS, AMA&nbsp;</p><h5><strong>Specification:&nbsp;</strong></h5><ul><li><strong>The date of production:</strong> May 2022&nbsp;</li><li><strong>Shelf life:</strong> 5 years from the date of production&nbsp;</li></ul><h5><strong>Metrological traceability:&nbsp;</strong></h5><p>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.&nbsp;</p><h5><strong>Homogeneity and stability:&nbsp;</strong></h5><p>Homogeneity and short term stability has been demonstrated according to the ISO GUIDE 35. This CRM will be monitored for over the period of its validity.</p><h5><strong>Storing and instruction for use:&nbsp;</strong></h5><p>This CRM have to be stored in original bottle and between 5-30°C (in a dark and dry place). The material 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;</p><h5><strong>Certified and indicative values and their uncertainties:&nbsp;</strong></h5><p>The certified and indicative values of total element contents 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.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Table_1_Certified_and_indicative_values_of_total_element_contents_and_their_associated_53a738dc33.jpg" alt="ANALYTIKA: Table 1 - Certified and indicative values of total element contents and their associated" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Table_1_Certified_and_indicative_values_of_total_element_contents_and_their_associated_53a738dc33.jpg 88w," sizes="100vw" width="570" height="1015"></p><h5><strong>Note:</strong></h5><p>Detailed information about the production, homogeneity testing and characterization of this CRM are described in the Certification report, which is available on request.</p>

Matrix certified reference material of green tea METRANAL® CRM AN-BM02

<h3><strong>Matrix certified reference material of strawberry leaves METRANAL® CRM AN-BM01</strong></h3><h4><strong>Packing:&nbsp;</strong></h4><p>25 g of powder of the strawberry leaves with a particle size of less than 100 µm in amber HDPE bottle. The sample is radiation stabilized.&nbsp;</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Matrix_certified_reference_material_of_strawberry_leaves_METRANAL_CRM_AN_BM_01_dedc732792.jpg" alt="ANALYTIKA: Matrix certified reference material of strawberry leaves METRANAL® CRM AN-BM01" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Matrix_certified_reference_material_of_strawberry_leaves_METRANAL_CRM_AN_BM_01_dedc732792.jpg 120w," sizes="100vw" width="480" height="626"></p><h4><strong>Intended use:&nbsp;</strong></h4><p>This certified reference material is intended primarily for use in realizing metrological traceability, validation of analytical methods and the transfer of property values by total element contents to other materials of similar composition.&nbsp;</p><h4><strong>Recommended analytical methods for method dependent measurements:&nbsp;</strong></h4><p>Flame AAS, ETA-AAS, ICP-OES, ICP-MS&nbsp;</p><h4><strong>Metrological traceability:&nbsp;</strong></h4><p>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.&nbsp;</p><h4><strong>Storing and instruction for use:&nbsp;</strong></h4><p>This CRM have to be stored in original bottle and between 5-30°C (in a dark and dry place). The material 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.</p><h4><strong>Certified and indicative values and their uncertainties:&nbsp;</strong></h4><p>The certified and indicative values of total element contents 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.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Table_1_Certified_and_indicative_values_of_total_element_contents_and_their_associated_bff6819a2e.jpg" alt="ANALYTIKA: Table 1 - Certified and indicative values of total element contents and their associated" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Table_1_Certified_and_indicative_values_of_total_element_contents_and_their_associated_bff6819a2e.jpg 81w," sizes="100vw" width="552" height="1062"></p>

Matrix certified reference material of strawberry leaves METRANAL® CRM AN-BM01

<h3><strong>Matrix certified reference material of sewage sludge METRANAL® CRM AN-OK01</strong></h3><p><strong>AN-OK01: </strong>sewage sludge with certified values of selected PCB, PAH and elements. The certified reference material AN-OK01 was prepared by spiking selected relevant organic compounds into the original natural matrix</p><h4><strong>Packing:</strong></h4><p>40 g of powder of the respective sewage sludge with a particle size of less than 100 µm in amber glass bottle. The sample is stabilized by radiation 25kGy.</p><h4><strong>Intended use:</strong></h4><p>This 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.</p><h4><strong>Recommended analytical methods for method dependent measurements:</strong></h4><p>Gas and liquid chromatography, flame AAS, ETA-AAS, ICP-OES, ICP-MS</p><h4><strong>Metrological traceability:</strong></h4><p>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.</p><h4><strong>Homogeneity and stability:</strong></h4><p>Homogeneity and short term stability has been demonstrated according to the ISO GUIDE 35.</p><h4><strong>Sample preparation:</strong></h4><p>Contents of element fractions extractable by aqua regia according to the ISO 11466. For organic compounds, the most frequently used are the following methods: EPA 8310, 8082A, 8081 or equivalent.</p><h4><strong>Storing and instruction for use:</strong></h4><p>This CRM has to be stored in original bottle -18°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 nonanalysed 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.</p><h4><strong>Certified and indicative values and their uncertainties:</strong></h4><p>The certified and indicative selected PCB and PAH are summarized in Table 1 and 2. The certified and indicative values of extractable element fraction are summarized in Table 3. 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.</p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Table_1_Certified_and_indicative_values_of_selected_PCB_and_f87d8d323e.jpg" alt="ANALYTIKA: Table 1 - Certified and indicative values of selected PCB and their associated uncertainties" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Table_1_Certified_and_indicative_values_of_selected_PCB_and_f87d8d323e.jpg 228w," sizes="100vw" width="950" height="651"></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Table_2_Certified_and_indicative_values_of_selected_PAH_and_their_5c0895bdb3.jpg" alt="ANALYTIKA: Table 2 - Certified and indicative values of selected PAH and their associated uncertainties" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Table_2_Certified_and_indicative_values_of_selected_PAH_and_their_5c0895bdb3.jpg 210w," sizes="100vw" width="1259" height="933"></p><p><img src="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/ANALYTIKA_Table_3_Certified_and_indicative_values_of_contents_of_element_fractions_574990a630.jpg" alt="ANALYTIKA: Table 3 - Certified and indicative values of contents of element fractions extractable by aqua regia" srcset="https://storage.googleapis.com/labrulez-bucket-strapi-h3hsga3/thumbnail_ANALYTIKA_Table_3_Certified_and_indicative_values_of_contents_of_element_fractions_574990a630.jpg 126w," sizes="100vw" width="979" height="1205"></p>

Matrix certified reference material of sewage sludge METRANAL® CRM AN-OK01

<h4><strong>Aqueous calibration solution ASTASOL® INT-MIX1</strong></h4><ul><li><strong>Category: </strong>Traced reference material</li><li><strong>Analytes: </strong>Bi, In, Sc, Tb, Y</li><li><strong>Product code: </strong>INT-MIX1</li></ul><p><strong>Starting primary compounds and theirs purities (%):</strong></p><ul><li>Bi 99.999; In 99.999; Sc2O3 99.995; Tb4O7 99.998; Y2O3 99.99</li></ul><p><strong>Matrix:</strong></p><ul><li>5% HNO3 (v/v), prepared from sub boil distilled HNO3 (ANALPURE®) and ultrapure demineralized water (resistivity ≥ 18MΩ.cm, 0.22µm filtered)</li></ul><p><strong>Assigned concentration value and expanded uncertainty (k = 2) at 20°C</strong></p><ul><li>Bi, In, Sc, Tb, Y 10.00 ± 0.05 mg/l&nbsp;</li></ul><h5><strong>Intended use:&nbsp;</strong></h5><p>As a calibrator of analytical methods analysing aqueous solutions such as atomic spectrometry (AAS, AES, ICP-OES, ICP-MS), molecular absorption and selected electroanalytical methods.&nbsp;</p><h5><strong>Characterization and traceability:&nbsp;</strong></h5><p>This RM has an assigned value of concentration and uncertainty on the basis of gravimetric preparation. Traceability is realized with CRM AN 9008(1N), AN 9026(1N), AN 9052(1N), AN 9058(1N), AN 9067(1N) through a short unbroken chain of calibrations (AAS, AES, ICP-OES) or comparisons (primary analytical methods). All mentioned CRM AN are traceable to the corresponding SRMs NIST.</p><h5><strong>Trace impurities in bottled solution&nbsp;</strong></h5><ul><li>Max. 0.02 mg/l (total)&nbsp;</li></ul><h5><strong>Homogeneity and stability:&nbsp;</strong></h5><p>It has been demonstrated that this RM is homogeneous and its stability is guaranteed during the whole shelf life provided the solution it kept under conditions presented below.&nbsp;</p><h5><strong>Storing and instruction for use:&nbsp;</strong></h5><p>This RM has to be stored in the original closed bottle between 5 – 30 °C. The producer guarantees a declared expiration time provided the RM is properly stored and professionally handled. The temperature of the solution must be 20 ± 0.5 °C before every use. It is important to cover the screw cap and the neck of the bottle with a parafilm layer after each opening to prevent vapour phase losses. It is not recommended to use the standard solution when the bottle contains less than 10 % of the solution. Therefore, in case of nontransparent bottle, it is important to indicate the amount of the solution used,e.g. on the label. Do not pippette from the bottle. Do not return removed aliquots to bottle.</p>

Aqueous calibration solution ASTASOL® INT-MIX1

<h4><strong>Aqueous calibration solution ASTASOL® INT-MIX3&nbsp;</strong></h4><ul><li><strong>Category:</strong> Traced reference material&nbsp;</li><li><strong>Analytes:</strong> Bi, Ge, In, 6Li, Sc, Tb, Y&nbsp;</li><li><strong>Product code:</strong> INT-MIX3&nbsp;</li></ul><p><strong>Starting primary compounds and theirs purities (%):</strong>&nbsp;</p><ul><li>Bi 99.999%; Ge 99.99%; In 99.999%; 6Li 99.99%; Sc2O3 99.995%; Tb4O7 99.998%; Y2O3 99.99%&nbsp;</li></ul><p><strong>Matrix:&nbsp;</strong></p><ul><li>5% HNO3 (v/v), prepared from sub boil distilled HNO3 (ANALPURE®) and ultrapure demineralized water (resistivity ≥ 18MΩ.cm, 0.22µm filtered) with traces of HF (ANALPURE®)</li></ul><h5><strong>Assigned concentration value and expanded uncertainty (k = 2) at 20°C&nbsp;</strong></h5><ul><li><strong>Bi, Ge, In, 6Li, Sc, Tb, Y 10.00 ± 0.05 mg/l&nbsp;</strong></li></ul><h5><strong>Intended use:&nbsp;</strong></h5><p>As a calibrator of analytical methods analysing aqueous solutions such as atomic spectrometry (AAS, AES, ICP-OES, ICP-MS), molecular absorption and selected electroanalytical methods.&nbsp;</p><h5><strong>Characterization and traceability:&nbsp;</strong></h5><p>This RM has an assigned value of concentration and uncertainty on the basis of gravimetric preparation. Traceability is realized with CRM AN 9008(1N), AN 9022(1FN), AN 9026(1N), AN 9030(1N), AN 9052(1N), AN 9058(1N), AN 9067(1N) through a short unbroken chain of calibrations (AAS, AES, ICP-OES) or comparisons (primary analytical methods). All mentioned CRM AN are traceable to the corresponding SRMs NIST.</p><h5><strong>Trace impurities in bottled solution&nbsp;</strong></h5><ul><li>Max. 0.02 mg/l (total)&nbsp;</li></ul><h5><strong>Homogeneity and stability:&nbsp;</strong></h5><p>It has been demonstrated that this RM is homogeneous and its stability is guaranteed during the whole shelf life provided the solution it kept under conditions presented below.&nbsp;</p><h5><strong>Storing and instruction for use:&nbsp;</strong></h5><p>This RM has to be stored in the original closed bottle between 5 – 30 °C. The producer guarantees a declared expiration time provided the RM is properly stored and professionally handled. The temperature of the solution must be 20 ± 0.5 °C before every use. It is important to cover the screw cap and the neck of the bottle with a parafilm layer after each opening to prevent vapour phase losses. It is not recommended to use the standard solution when the bottle contains less than 10 % of the solution. Therefore, in case of nontransparent bottle, it is important to indicate the amount of the solution used,e.g. on the label. Do not pippette from the bottle. Do not return removed aliquots to bottle.</p>

Aqueous calibration solution ASTASOL® INT-MIX3

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Analytika is a Czech company that offers and produces certified reference materials (CRM) and (ultra)pure chemicals for quality control and quality assurance in laboratories, including accredited laboratories.

Our portfolio also includes pipettes and tips, digestors, PFA labware and other equipment for analytical laboratory and trace analysis.

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