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.
出处
《广东微量元素科学》
CAS
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)
