Chromium-enriched yeast (CrY) is a popular Cr dietary supplement, but suitable speciation analysis of highly toxic Cr(VI) in CrY is not available. Ion chromatography-inductively coupled plasma mass spectrometry method was firstly developed and validated for the quantification of Cr(III) and Cr(VI). Ultrasound-assisted weakly alkaline EDTA solution combined with boiling was used to extract two Cr species in CrY. Two species were separated on two successive anion-exchange columns using a mobile phase of 0.6 mmol/L EDTA and 76 mmol/L NH4NO3 solution. The method was sensitive, accurate (92.4–100.9%), and precise (0.8–3.1%). Species of Cr(VI) were not found in CrY.
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This study was financially supported by the Angel Nutrition Research Funding (grant number AF2018003).
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Zhang, SQ., Cheng, SH., Shen, S. et al. Speciation Analysis of Chromium in Chromium-Enriched Yeast by Ion Chromatography-Inductively Coupled Plasma Mass Spectrometry. Biol Trace Elem Res 199, 338–343 (2021). https://doi.org/10.1007/s12011-020-02149-0
- Chromium-enriched yeast
- Ion chromatography-inductively coupled plasma mass spectrometry