MPI-DING glasses: New geological reference materials for in situ Pb isotope analysis

Abstract

Advances in microanalytical techniques continue to revolutionize trace element and isotope geochemistry. Yet the lack of widely available geological reference materials has made interlaboratory comparisons and assessment of analytical accuracy difficult or impossible in many cases. The preparation and extensive analysis of the MPI-DING glasses has been designed to fill this gap. Here we report high- precision Pb isotope analyses by TIMS and MC-ICPMS techniques on seven geological MPI-DING glasses. The Pb concentrations in the reference glasses vary between 0.4 and 20 μg/g, allowing use in a wide range of analytical situations. In addition, solution ICPMS and LA-ICPMS analyses were used to in..