TY - JOUR A1 - Hodoroaba, Vasile-Dan A1 - Marinenko, R.B. A1 - Rackwitz, Vanessa A1 - Bremser, Wolfram A1 - Unger, Wolfgang T1 - Determination of the k-values of copper-gold alloys with ED- and WD-EPMA - Results of an inter-laboratory comparison JF - Microscopy and microanalysis N2 - An inter-laboratory comparison organized as a pilot study (PS) has been performed under the umbrella of the Consultative Committee for Amount of Substance – Metrology in Chemistry (CCQM) / Surface Analysis Working Group (SAWG) with the objective to compare k-values measured with Electron Probe X-ray Microanalysis (EPMA) for copper-gold alloys. The k-value, defined as the ratio of the Xray photon intensity of an X-ray characteristic line of the unknown sample to the corresponding one in the reference material, is a rough estimate of the mass fraction of the respective element. Basically, the mass fractions can be calculated from the k-values after applying a matrix correction procedure, which includes empirical approaches, so that traceability gets lost. Due to its physical, measurable nature, the k-value has been selected in the present PS as the primary measurand. The mass fraction has been set as the secondary (derived) measurand. Both EDX and WDX have been employed. The WDX results and the overall comparability between the k-values obtained by EDX and WDX are still in progress. KW - Interlaboratory comparison KW - EDX KW - WDX KW - EPMA KW - K-values KW - Cu-Au alloy KW - CCQM PY - 2014 DO - https://doi.org/10.1017/S1431927614005376 SN - 1431-9276 SN - 1435-8115 VL - 20 IS - Suppl. S 3 SP - 730 EP - 731 PB - Cambridge University Press CY - New York, NY AN - OPUS4-31338 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -