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Fully Automated Total Metals and Chromium Speciation Single Platform Introduction System for ICP-MS

Abstract

Measuring chromium species in drinking water has become of particular interest due to the daily environmental contamination that is created by industrial processes. Agencies such as the US Environmental Protection Agency and the European Union continue to investigate the maximum to which Cr(VI) contaminant levels should be set, thus laboratories must seek more efficient ways of operating routine analyses. In this work a single platform, automated speciation and total metals method is presented for chromium speciation in drinking water, waste water, industrial waters, and recipient waters and for total metals of sludges, soils, organic waste, ashes, biological samples, or paint. Historical samples were measured using the prepFAST IC system for Cr(III) and Cr(VI) and compared to HPLC results. In addition, historical samples from the aqua regia total method were compared to the total metals method performed by the prepFAST IC. Sample comparisons resulted in linear regression plots with very good correlations; greater than 0.97 for total metals over a dynamic range of 0.010 – 100,000 µg L-1 for 63 elements and greater than 0.98 for Cr(VI) speciation. Limits of detection for Cr(VI) and Cr(III) using the prepFAST IC and ICP-MS combination resulted in 7 ng L-1 and 12 ng L-1, respectively. The new method resulted in a ~ 43X improvement in detection limits as compared to the previous method employed in this laboratory. Accuracy for quality control samples of Cr(VI) were in good agreement to the historical values collected using the old method.

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Publication details

The article was received on 13 Oct 2018, accepted on 30 Nov 2018 and first published on 30 Nov 2018


Article type: Paper
DOI: 10.1039/C8JA00342D
Citation: J. Anal. At. Spectrom., 2018, Accepted Manuscript
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    Fully Automated Total Metals and Chromium Speciation Single Platform Introduction System for ICP-MS

    C. D. Quarles Jr., M. Szoltysik, P. Sullivan and M. Reijnen, J. Anal. At. Spectrom., 2018, Accepted Manuscript , DOI: 10.1039/C8JA00342D

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