Effect of valence state on ICP-OES value assignment of SRM 3103a arsenic spectrometric solution

Analytical Chemistry
Lee L YuGregory C Turk

Abstract

The certification of Standard Reference Material (SRM is a registered trademark of NIST) 3103a As Spectrometric Solution is based on the gravimetric preparation value that is verified by inductively coupled plasma optical emission spectrometry (ICP-OES) measurements. A disagreement between the gravimetric and the spectrometric values for a batch of As calibration solutions led to the discovery that the solutions contained a mixture of trivalent and pentavalent As species and that the pentavalent species was approximately 8% more sensitive than the trivalent species with ICP-OES determination. The kinetics of the reaction between As metal and nitric acid were studied, and the results were applied to develop a procedure that would consistently produce single-species pentavalent As standards, which eliminates As speciation as a source of measurement bias in the SRM certification process.

References

Aug 1, 1998·Analytical Chemistry·M L Salit, G C Turk
Jan 1, 2000·Journal of Research of the National Institute of Standards and Technology·M S LevensonN F Zhang

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Citations

Mar 12, 2008·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Tomohiro NarukawaKoichi Chiba
Jan 15, 2014·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Koichi Chiba, Tomohiro Narukawa
Mar 4, 2015·Analytical and Bioanalytical Chemistry·Lee L YuJun Wang
Oct 3, 2017·Analytical Methods : Advancing Methods and Applications·Lee L YuRolf Zeisler
Jan 31, 2020·Journal of Agricultural and Food Chemistry·Caleb LuvongaSang Bok Lee

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