Pb isotope data and uncertainty budget for the CCRMP sulphide reference materials CPB-2, MP-1b, CCU-1e and CZN-4 (MC-ICP-MS and ICP-QMS)

Companion dataset to the paper by Strnad et al., "High-Precision Lead Isotope Characterisation of CCRMP Sulphide Reference Materials (CPB-2, MP-1b, CCU-1e, CZN-4) by MC-ICP-MS and ICP-QMS: Assessment of Matrix Separation Protocols and Traceability", submitted to Geostandards and Geoanalytical Research (manuscript GGR 2513577). The dataset consists of two Excel workbooks, each opening with an introductory sheet that describes its content. raw_data_repository_Strnad_et_al.xlsx contains the raw measurement data: the NIST SRM 981 bracketing standards and the long-term record of the calibrator on MC-ICP-MS; NIST SRM 982 analysed as an unknown on both instruments, the basis of the method bias; the cycle-by-cycle MC-ICP-MS data for the four reference materials measured after matrix separation of Pb, the measurements made without separation and the repeat measurements from the archived stock solutions; the two ICP-QMS runs with intensities; and the m/z 202 mercury monitor for the MC-ICP-MS measurements with and without separation. Strnad_uncertainty_budget_Nordtest.xlsx is a fully formula-driven top-down uncertainty budget following Nordtest TR 537 in accordance with the GUM. Every value in Tables 3, 5 and 6 of the paper can be recomputed from the raw data.