高灵敏度分光光度法测定茶叶中锌的含量  

Determination of Zinc in Tea Through Highly Sensitive Spectrophotometric System

作　　者：陈慧敏[1] 应如梦[1] 王帅[1] 林丝丝[1] 张春牛[1] 

机构地区：[1]丽水学院化学系,浙江丽水323000

出　　处：《广东微量元素科学》2011年第6期37-40,共4页Trace Elements Science

基　　金：浙江省新苗人才计划基金(编号:2010R429024)

摘　　要：研究了在聚乙烯醇（PVA）存在下，Zn^2＋-SCN-RhB高灵敏度显色反应体系，采用分光光度法测定茶叶中微量锌的新方法。结果表明，络合物的最大吸收峰在605 nnm处，摩尔吸光系数为1．59×10^6 L·mol^-1。cm^-1，Zn^2＋的质量浓度在0．0—0．04μg／mL范围内服从比尔定律。该法用于测定茶叶中锌的含量，结果满意。A new spectrophotometric method for the determination of zinc in tea by using Zn2＋- SCN^-- PdaB - PVA highly sensitive chromogenic reaction system was studied. The results show that the strongest absorption peak of ion complex is at 605 nm and the molar absorption coefficient is 1.59 x 10^6 L mol^-1 cm^-1. When the zinc concentration is in the range of O. 0 - 0. 04 μg/mL, which accords with lambert beer＇s law. Favorable results can be achieved with this method.

关 键 词：分光光度法 锌 罗丹明B 茶叶 

分 类 号：O657.32[理学—分析化学]