硒酵母中硒的化学形态分析与评价

 利用Ｔｒｉｓ－缓冲液－甘油提取法对硒酵母的化学形态进行了分析，并与透析法进行比较。结果表明，经过特殊工艺生产的硒酵母虽然总硒含量达到４０００μｇ／ｇ以上，但其中５０％以上的硒为硒蛋氨酸形态的蛋白质或其它大分子态硒，无机态硒仅占３％左右，而游离态硒只占０．０１％。说明硒酵母有广阔的开发前景，同时也为硒制剂提供了适宜的质量监测方法。

Assessment of selenium chemical species in selenium-yeast

Selenium chemical species in selenium- yeast were determined by extraction withtris- buffer- glycine mixed solution,and compared with dialysis method. The results indicated thatmore than 50%of selenium in the selenium -yeast（total Se is 4000μg/g） was probably in proteinbound molecules as selenomethionine or other large organic species. The inorganic species only ac-counted for 3%,and the free species 0. 01%,It was shown that Se yeast has development prospec-tives and there is a better wav for determination of selenium products.