作　　者： ; ; ;

机构地区： 辽宁大学化学科学与工程学院

出　　处： 《化学与生物工程》 2006年第7期60-62,共3页

摘　　要： 采用原子荧光光谱法对茶叶中硒的含量进行了分析，用巯基棉富集和硫脲抗坏血酸掩蔽Pb^2＋、Cu^2＋、Ag^＋的干扰。讨论并确定了最佳测定条件，硒的检出限为0．57ng·mL^-1，线性范围为0．00～100．00ng·mL^-1，回收率为99．0％～106．3％，相对标准偏差小于1．71％。 Selenium element in teas can be determined by atomic fluorescence spectrometry. The method was described for the eliminating the interference of Pb^2＋ ,Cu^2＋ , Ag^＋ with the enrichment of sulfhydryl cotton and thiourea ascorbic acid. The optimum determination conditions were tested and discussed. The linear range and detection limit were 0. 00-100. 00 ng · mL^-1 and 0. 57 ng ·mL^-1 respectively. The rate of recovery varied from 99.0 % to 106.3%, and the RSD was less.than 1.71%.

关 键 词： 茶叶 硒 原子荧光光谱法 巯基棉

领　　域： [理学] [理学]