Interlaboratory comparison tests  in mineralogical works

Ожогина, Е. Г.; Lebedeva, M. I.; Gorbatova, E. A.

doi:10.20915/2077-1177-2017-13-2-37-47

Cited by 5 publications

(3 citation statements)

References 5 publications

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“…Процент отклонения от аттестованного содержания для полного разложения методом ИСП-МС составил в среднем −16,12%, для полуколичественного РФА-анализа +11,12%. На рисунке 2 представлено отклонение результатов измерений стандартного образца ООКО-151 от его аттестованных содержаний методами ИСП-МС, ИСП-АЭС и РФА анализа на примере модели Z-индекса [15]. Пунктирной линией ограничен доверительный интервал, равный значению расширенной неопределённости 20%, в котором результаты анализов признаны удовлетворительными.…”

Section: анализ образцов и аттестация методами исп-мс и исп-аэс полук...unclassified

Methods of Preparing Reference Soil Samples for Non-Destructive XRF-Analysis

Kolbin¹

2022

jour

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Experimental studies of the selection of the most optimal homogenization, sample preparation procedure, and sample pressing parameters have been conducted. Reference samples were selected including eference standards with certified values of the content of elements and oxides. For enhancement of concentration ranges determined, 8 background samples with the most typical chemical composition in the STS territory were additionally selected. The content of elements in samples was certified by mass- and atomic emission spectrometry (ICP-MS and ICP-AES). Pressed pellets were prepared, a semi-quantitative X-ray fluorescent analysis (XRF analysis) of 8 samples with the known content was carried out by the ‘best detection’ to identify systematic discrepancies in determining compositions of samples using a destructive and non-destructive analytical technique and sample preparation.

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Section: анализ образцов и аттестация методами исп-мс и исп-аэс полук...unclassified

Methods of Preparing Reference Soil Samples for Non-Destructive XRF-Analysis

Kolbin¹

2022

jour

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“…где х -результат участника; X -приписанное значение; о -стандартное отклонение для оцен ки квалификации. Z-индекс является наиболее распространен ным у провайдеров показателем, применяемым для интерпретации результатов участников [8][9][10][11].…”

Section: Introductionunclassified

Interlaboratory experiment design in the production of reference materials (ICRM) and statistical processing of the results obtained

Kolpakova¹,

Khuzagaleeva²,

Степановских³

2023

Zavod. lab., Diagn. mater.

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Institute for Certified Reference Materials (ICRM) is a leading manufacturer of certified reference materials (CRM) for ferrous metallurgy. The entire process of CRM production from the purchase of a material to the certificate issuance takes about two years. The determination of the metrological characteristics is the longest stage of CRM production. The metrological characteristics of reference materials, are evaluated, as a rule, according to the results of an interlaboratory experiment and, in addition, in combination with a comparison method. The interlaboratory experiment arranged by ICRM, involves at least 10 competent analytical laboratories. The interlaboratory comparative tests are also carried out to test the qualification of laboratories. Since 2017, ICRM has been accredited by the Federal Accreditation Service as a proficiency provider of interlaboratory comparison.

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“…External control is the verification of qualifications by conducting interlaboratory comparison tests (ICT). [1][2][3][4][5]18] In accordance with the policy of the Russian Federal Accreditation Service, interlaboratory comparison tests must be carried out by providers accredited for testing certain types of products, but currently there are no accredited providers for interlaboratory testing of building materials, products, and structures. Therefore, interlaboratory comparison tests are conducted either between testing laboratories, where the provider is one of the laboratories or an organization that takes over the functions of the ICT provider.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the quality of measurements of the testing laboratory during interlaboratory comparative tests

Mukhamedzhanova

Borovkova²

2023

E3S Web of Conf.

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The article presents the statistical processing of the test results of the mass fraction of the chlorine ion (Cl) obtained from two accredited testing laboratories. The stages of statistical processing of the results of interlaboratory comparison tests are as follows: elimination of gross errors, determination of the uniformity of the sample, calculation of the assigned value, evaluation of the quality of the measurement results. The presence of gross errors in the sample was determined by the Grubbs test, and the uniformity of the sample was confirmed by the Fisher’s test and Student’s test. The assigned value was calculated by a robust method using algorithm A with an iterative scale. The quality of laboratory measurement results was evaluated using the z-score. The z-score value for each participant showed that the results of measuring the mass fraction of chlorine ion in cement samples were acceptable. The quality of the results of these laboratories is satisfactory and does not require corrective measures. These results of the test quality assessment can be used for the organizers of interlaboratory tests, as well as for accredited laboratories that check their qualifications.

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Interlaboratory comparison tests in mineralogical works

Cited by 5 publications

References 5 publications

Methods of Preparing Reference Soil Samples for Non-Destructive XRF-Analysis

Methods of Preparing Reference Soil Samples for Non-Destructive XRF-Analysis

Interlaboratory experiment design in the production of reference materials (ICRM) and statistical processing of the results obtained

Evaluation of the quality of measurements of the testing laboratory during interlaboratory comparative tests

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