Purity determination as needed for the realisation of primary standards for elemental determination: status of international comparability
Within the National Metrology Institutes (NMIs) and designated laboratories, an interlaboratory comparison, CCQM-P107, was conducted to verify the degree of international comparability concerning the results of purity analysis. The mass fractions of Ag, Bi, Cd, Cr, Ni, Tl at the lower mg/kg-level in...
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| creator | Kipphardt, Heinrich Matschat, Ralf Vogl, Jochen Gusarova, Tamara Czerwensky, Michael Heinrich, Hans-Joachim Hioki, Akiharu Konopelko, Leonid A. Methven, Brad Miura, Tsutomu Petersen, Ole Riebe, Gundel Sturgeon, Ralph Turk, Gregory C. Yu, Lee L. |
| description | Within the National Metrology Institutes (NMIs) and designated laboratories, an interlaboratory comparison, CCQM-P107, was conducted to verify the degree of international comparability concerning the results of purity analysis. The mass fractions of Ag, Bi, Cd, Cr, Ni, Tl at the lower mg/kg-level in a high purity zinc material were determined, but the real measurand in metrological sense was the sum of the six mass fractions. Homogeneity was investigated by glow discharge mass spectrometry, reference values were obtained using isotope dilution mass spectrometry. Six NMIs participated, contributing eight independent data sets. The agreement amongst the results of the participants, their median and the agreement with the reference values were usually excellent and in almost all cases below the target uncertainty of 30% relative. In this manner, the accuracy of results and the comparability between the participants was demonstrated to be established. |
| doi_str_mv | 10.1007/s00769-009-0557-0 |
| format | Article |
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The mass fractions of Ag, Bi, Cd, Cr, Ni, Tl at the lower mg/kg-level in a high purity zinc material were determined, but the real measurand in metrological sense was the sum of the six mass fractions. Homogeneity was investigated by glow discharge mass spectrometry, reference values were obtained using isotope dilution mass spectrometry. Six NMIs participated, contributing eight independent data sets. The agreement amongst the results of the participants, their median and the agreement with the reference values were usually excellent and in almost all cases below the target uncertainty of 30% relative. In this manner, the accuracy of results and the comparability between the participants was demonstrated to be established.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer-Verlag</pub><doi>10.1007/s00769-009-0557-0</doi><tpages>9</tpages></addata></record> |
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| subjects | Analytical Chemistry Biochemistry Calibration Chemistry Chemistry and Materials Science Commercial Law Dilution Ecotoxicology Food Science Glow discharges Homogeneity Laboratories Marketing Mass spectrometry Pilot projects Plasma Practitioner's Report Purity Reference materials Scientific imaging Zinc |
| title | Purity determination as needed for the realisation of primary standards for elemental determination: status of international comparability |
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