“…Despite development of sensitive and selective detection/quantitation techniques, primarily based on various chromatographies in combination with element-selective detection [5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21], there exists a need for Certified Reference Materials (CRMs) to provide traceability of data and quality control for validation. Species-specific CRMs are currently available from only a few reference material producers and the suite of analytes is quite limited, including Sn, Hg, As, Cr and Se [22].…”