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Determination of Cadmium by ICP-MS in Samples Containing High Concentrations of Molybdenum and Tin

Published

Author(s)

Steven J. Christopher, R. Q. Thompson

Abstract

A four-step matrix reduction procedure, beginning with thiourea-based SPE, was developed for the ICP-MS determination of cadmium in difficult sample matrixes. The separation scheme reduced the concentrations of tin and molybdenum, significant spectral interference sources for cadmium, from mg/kg levels to μg/kg and sub-μg/kg levels respectively, making possible interference-free measurement of 111Cd and 113Cd and facilitating isotope dilution quantification. Cadmium recovery through the full procedure was 78%. Accuracy was shown by application to NIST SRMs 1568a Rice Flour and 2703 Marine Sediment. Method robustness was demonstrated by analysis of a multivitamin tablet containing high relative concentrations of Mo and Sn.
Citation
Journal of Analytical Atomic Spectrometry

Keywords

ICP-MS, solid phase extraction, cadmium, isotope dilution mass spectrometry

Citation

Christopher, S. and , R. (2013), Determination of Cadmium by ICP-MS in Samples Containing High Concentrations of Molybdenum and Tin, Journal of Analytical Atomic Spectrometry, [online], https://doi.org/10.1039/C2AY26212F (Accessed April 12, 2024)
Created January 8, 2013, Updated January 27, 2020