富硒虫草中硒的赋存形态及分布特点

研究恩施人工栽培的富硒虫草中硒的含量分布和赋存形态，采用不同的浸提液提取虫草中的多糖和不同种类蛋白质，双道原子荧光检测原料和各组分中的含硒量。结果表明，蛋白结合硒是虫草中硒的主要赋存形态，占总硒含量的51.44%；在不同种类的蛋白质组分中，以碱溶性蛋白质结合的硒量最多，占总可溶性蛋白硒含量的31.18%；也有部分硒和多糖结合，占总硒含量的12.01%。

Chemical Form and Distribution of Selenium in Cordyceps

This study was aiming to investigate the combined forms and distribution of selenium in cultivated Cordyceps from Enshi city. Crude polysaccharides and protein in Cordyceps were extracted using different solvents, and the contents of selenium were analyzed by double-channel atomic fluorescence spectrometry. Resutls showed that the selenium binding with protein was the main storage form in the Cordyceps, accounting for 51.44% of total selenium. Alkali-soluble protein seemed to contain the highest amount of bound selenium, contributing to 31.18% of total selenium and 12.01% of selenium was observed to be bound to polysaccharides.