High accuracy measurements of trace elements in drinking water by exact matching isotope dilution mass spectrometry (IDMS)

The accurate determination of trace elements in drinking water (nickel, cadmium and lead) has been achieved by adopting exact-matching isotope dilution mass spectrometry (IDMS) technique. The measurement uncertainty of the method was rigorously investigated and values with less than 2% combined uncertainty (k = 2) were achieved for all 3 analytes. These results were submitted for an international intercomparison and were in excellent agreement with the Key Comparison Reference Value (KCRV).

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (115 K)Download as PowerPoint slideHighlights► Exact-matching isotope dilution mass spectrometry was used for the analysis of trace elements in drinking water. ► High accuracy results traceable to the International System of Units (SI) were obtained. ► An expanded uncertainty with less than 2% combined uncertainty (k = 2) were achieved for all analytes.