Chinese Acad Sci, Inst High Energy Phys, Lab Nucl Anal Technique, Beijing 100080, Peoples R China
The chemical species and combination state of chromium in Cr-rich brewer's yeast were studied. In the analysis of its chemical species, the contents of Cr(III) and Cr(VI) in the filtrate were extracted with tris-buffer-glycine mixed solution and determined by exchange resin combined with atomic absorption spectrometry. The method was rapid and simple. The results indicated,that the inorganic chromium only accounted for 14% similar to 16% of the total chromium. During the organized process of Cr by the brewer's yeast, more than 84% are transformed to the organic species, which demonstrates that chromium has participated in the biological synthesis of the yeast cell. This transformation is beneficial to improve the biological function of chromium.