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.

中文翻译：

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通过离子色谱-电感耦合等离子体质谱法对富铬酵母中的铬进行形态分析。

富含铬的酵母 (CrY) 是一种流行的 Cr 膳食补充剂，但没有合适的 CrY 中剧毒 Cr(VI) 的形态分析。离子色谱-电感耦合等离子体质谱法首先被开发和验证用于 Cr(III) 和 Cr(VI) 的定量。超声辅助弱碱性 EDTA 溶液结合煮沸提取 CrY 中的两种 Cr 物质。在两个连续的阴离子交换柱上使用 0.6 mmol/L EDTA 和 76 mmol/L NH4NO3 溶液的流动相分离两种物质。该方法灵敏、准确 (92.4-100.9%) 和精确 (0.8-3.1%)。在 CrY 中未发现 Cr(VI) 的种类。