Final report of the key comparison CCQM-K88: Determination of lead in lead-free solder containing silver and copper

Hioki, Akiharu; Nonose, Naoko; Liandi, Ma; Chao, Jingbo; Liuxing, Feng; Wei, Chao; Cho, Kyung Haeng; Suh, Jung Ki; Min, Hyegeun; Lim, Youngran; Recknagel, Sebastian; Koenig, Maren; Vogl, Jochen; Sena, Rodrigo Caciano de; Reis, Lindomar Augusto dos; Borinsky, Mónica; Puelles, Mabel; Hatamleh, Nadia; Acosta, Osvaldo Reyes; Turk, Gregory C.; Rabb, Savelas A.; Sturgeon, Ralph E.; Methven, Brad; Rienitz, Olaf; Jaehrling, Reinhard; Konopelko, L. A.; Kustikov, Yu. A.; Kozyreva, S B; Korzh, A A

doi:10.1088/0026-1394/50/1a/08002

Cited by 2 publications

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“…Even though participants in CCQM-K88 [ 60 ] were allowed to use any suitable method of measurement, at its meeting of April 11-12, 2011, the CCQM-IAWG decided that the KCRV would be estimated based on the measurement results obtained using either inductively coupled plasma mass spectrometry (ID-ICP-MS) (four participants) or isotope dilution thermal ionization mass spectrometry (ID-TIMS) (one participant), therefore excluding the results from the other five participants. The reported KCRV was the median, 197.2 mg / kg, with expanded uncertainty of 0.9 mg / kg for 95% coverage.…”

Section: Examplesmentioning

confidence: 99%

Decision Tree for Key Comparisons

Possolo

Koepke

Newton

2021

J. RES. NATL. INST. STAN.

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This contribution describes a Decision Tree intended to guide the selection of statistical models and data reduction procedures in key comparisons (KCs). The Decision Tree addresses a specific need of the Inorganic Analysis Working Group (IAWG) of the Consultative Committee (CC) for Amount of Substance, Metrology in Chemistry and Biology (CCQM), of the International Committee for Weights and Measures (CIPM), and it is likely to address similar needs of other working groups and consultative committees. Because the portfolio of KCs previously organized by the CCQM-IAWG affords a full range of opportunities to demonstrate the capabilities of the Decision Tree, the majority of the illustrative examples of application of the Decision Tree are from this working group. However, the Decision Tree is widely applicable in other areas of metrology, as illustrated in examples of application to measurements of radionuclides and of the efficiency of a thermistor power sensor. The Decision Tree is intended for use after choices will have been made about the measurement results that qualify for inclusion in the calculation of the key comparison reference value (KCRV), and about the measurement results for which degrees of equivalence should be produced. Both these choices should be based on substantive considerations, not on purely statistical criteria. However, the Decision Tree does not require that the measurement results selected for either purpose be mutually consistent. The Decision Tree should be used as a guide, not as the sole and autonomous determinant of the model that should be selected for the measurement results obtained in a KC, or of the procedure that should be employed to reduce these results. The scientists running the KCs ultimately have the freedom and responsibility to make the corresponding choices that they deem most appropriate and that best fit the purpose of each KC. The Decision Tree involves three statistical tests, and comprises five terminal leaves, which correspond to as many alternative ways in which the KCRV, its associated uncertainty, and the degrees of equivalence (DoEs) may be computed. This contribution does not purport to suggest that any of the KCRVs, associated uncertainties, or DoEs, presented in previously approved final reports issued by working groups of the CCs should be modified. Neither do the alternative results question existing, demonstrated calibration and measurement capabilities (CMCs), nor do they support any new CMCs.

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Section: Examplesmentioning

confidence: 99%

Decision Tree for Key Comparisons

Possolo

Koepke

Newton

2021

J. RES. NATL. INST. STAN.

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The role of ICP-MS in inorganic chemical metrology

Sargent¹,

Goenaga‐Infante²,

Inagaki³

et al. 2019

Metrologia

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ICP-MS has played a key role in inorganic chemical metrology for 25 years, from the 1993 CIPM feasibility study which led to establishment of the CCQM. Since that time, the Inorganic Analysis Working Group of the CCQM has organised 56 international comparisons involving measurements by ICP-MS and, in a recent comparison, 16 different national institutes submitted their results using the technique. Metrological applications of ICP-MS currently address an enormous range of measurements using a wide variety of instrumentation, calibration strategies and methodologies. This review provides an overview of the ICP-MS field with an emphasis on developments which are of particular relevance to chemical metrology. Examples from CCQM comparisons and the services available from the participants are used to illustrate how the capability and scope of ICP-MS methods have expanded far beyond the expectations of 1993. This is due in part to the research and development programmes of the national institutes which participate in the CCQM. They have played a key role in advancing new instrumentation and applications for elemental analysis, isotope dilution mass spectrometry, determination of isotopic ratio or composition, and speciation of organometallic compounds. These developments are continuing today, as demonstrated by work in new fields such as heteroatom quantitation of proteins, characterisation and counting of nanoparticles using spICP-MS, and LA-ICP-MS analysis of solid materials.

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Final report of the key comparison CCQM-K88: Determination of lead in lead-free solder containing silver and copper

Cited by 2 publications

References 0 publications

Decision Tree for Key Comparisons

Decision Tree for Key Comparisons

The role of ICP-MS in inorganic chemical metrology

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