胶体钯-石墨炉原子吸收直接测定枸杞酒中硒含量的方法研究

发布时间：2018-05-20 12:01

  本文选题：枸杞酒 + 硒　； 参考：《现代食品科技》2017年02期

【摘要】：硒是枸杞酒的重要功效成分之一,需要对枸杞酒中的硒含量进行测定。本文采用胶体钯-石墨炉原子吸收直接测定枸杞酒中的硒含量。不经过繁琐的消解过程,将酒样酸化和稀释后直接上机测定,在石墨炉升温过程中去除酒样中的有机杂质,这大大简化了测定步骤。对此法的升温程序进行优化,然后在优化条件下测定硒含量。结果表明,添加胶体钯作为基体改进剂的优化升温程序为:干燥温度110℃、时间40 s,灰化温度1100℃、时间20 s、升温速率10℃/s,原子化温度2200℃;此法测定硒标准曲线方程为:Y=0.000024x~2+0.0041x+0.017,相关系数R2=0.9988;检出限为26.74 pg;测定枸杞酒中硒含量为14.52μg/L,RSD值10%,加标回收率为102.60%。因此,胶体钯-石墨炉原子吸收测定枸杞酒中硒含量的方法准确可靠,简单可行。
[Abstract]:Selenium is one of the important functional components of Lycium barbarum wine, and the content of selenium in Lycium barbarum wine needs to be determined. The content of selenium in Lycium barbarum wine was determined by colloidal palladium-graphite furnace atomic absorption spectrometry. After acidizing and diluting the liquor samples, the organic impurities in the wine samples were removed during the heating process of graphite furnace without complicated digestion process, which greatly simplifies the determination steps. The temperature program of this method was optimized and the selenium content was determined under the optimized conditions. The results show that the optimum temperature program of adding colloidal palladium as matrix modifier is as follows: drying temperature 110 鈩，

本文编号：1914545