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CCQM-K143 Comparison of Copper Calibration Solutions Prepared by NMIs/DIs



John L. Molloy, Michael R. Winchester, Therese A. Butler, Olaf Rienitz, Volker Goerlitz, Anita Roethke, Volker Goerlitz, Rodrigo Caciano de Sena, Lu Yang, Kenny Nadeau, Patricia R. Arancibia, Wu Bing, Zhou Tao, James Snell, Jochen Vogl, Maren Koenig, R. K. Kotnala, S. Swarupa Tripathy, Christine Elishian, Rosi Ketrin, Toshihiro Suzuki, Tom Oduor Okumu, Yong-Hyeon Yim, Judith Velina Lara Manzano, Mirella Buzoianu, Alena Sobina, Veniamin Zyskin, Egor Sobina, Pavel Migal, Mare Linsky, Suleyman Z. Can, Betul Ari, Heidi Goenaga Infante


CCQM-K143 is a key comparison that assesses participants' ability to prepare single element calibration solutions. Preparing calibration solutions properly is the cornerstone of establishing a traceability link to the International System of Units (SI), and therefore should be tested in to order to confirm the validity of CCQM comparisons of more complex materials. CCQM-K143 consisted of participants each preparing a single copper calibration solution at 10 g/kg copper mass fraction and shipping 10 bottled aliquots of that solution to the coordinating laboratory, the National Institute of Standards and Technology (NIST). The masses and mass fraction for the prepared solutions were documented with the submitted samples. Bottles for all participants were measured at NIST by high performance inductively coupled plasma optical emission spectroscopy (HP-ICP-OES) and compared on a relative scale, without calibration, using the submitted mass fractions. Results showed most participants produced equivalent results, although, two could not be compared due to calculation and preparation errors. These results were confirmed by a second set of ICP-OES measurements performed by the Physikalisch-Technische Bundesanstalt (PTB). CCQM-K143 showed that participants are capable of preparing calibration solutions from copper metal and similar high-purity, assayed source materials.


elemental analysis, copper, standard solutions, metrology, gravimetric preparation


Molloy, J. , Winchester, M. , Butler, T. , Rienitz, O. , Goerlitz, V. , Roethke, A. , Goerlitz, V. , Caciano de Sena, R. , Yang, L. , Nadeau, K. , Arancibia, P. , Bing, W. , Tao, Z. , Snell, J. , Vogl, J. , Koenig, M. , Kotnala, R. , Tripathy, S. , Elishian, C. , Ketrin, R. , Suzuki, T. , Okumu, T. , Yim, Y. , Manzano, J. , Buzoianu, M. , Sobina, A. , Zyskin, V. , Sobina, E. , Migal, P. , Linsky, M. , Can, S. , Ari, B. and Infante, H. (2020), CCQM-K143 Comparison of Copper Calibration Solutions Prepared by NMIs/DIs, Metrologia, [online], (Accessed May 19, 2024)


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Created December 24, 2020, Updated May 16, 2023