汞与邻羟基苯基重氮氨基偶氮苯显色反应的研究  

STUDY ON THE CHROMOGENIC REACTION OF MERCURY(Ⅱ) WITH o-HYDROXY-BENZENEDIAZOAMINOAZOBENZENE (HBDAB)

作　　者：张薇[1] 范华均[1] 侯勤 

机构地区：[1]广东药学院,广州510224

出　　处：《理化检验（化学分册）》2003年第8期480-481,484,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究了汞与邻羟基苯基重氮氨基偶氮苯(HBDAB)的显色反应。在Na2B2O7-Na2CO3缓冲溶液中有OP乳化剂存在下,Hg(Ⅱ)与HBDAB形成1:3橙红色配合物,其最大吸收峰位于515nm波长处,表观摩尔吸光系数为1.36×105L·mol-1·cm-1,Hg(Ⅱ)在0～20μg/25ml范围内符合比耳定律,方法应用于中草药中痕量汞的测定,结果满意。In an alkaline solution buffered at pH 11 with Na2B4O7-Na2CO3 buffer solution, and in the presence of the non-ionic surfactant OP, mercury(Ⅱ) reacts with HBDAB to form a reddish colored complex having its absorption maxima at 515nm, and an apparent molar absorptivity of (∈515) 1. 36×105L ·mol-1·cm-1. Beer s law holds in the range of 0-20μg of Hg(Ⅱ) per 25ml of solution. The proposed method has been satisfactorily used in the determination of Hg(Ⅱ) in water and in some Chinese traditional drugs.

关 键 词：汞 邻羟基苯基重氮氨基偶氮苯 显色反应 OP乳化剂 吸光光度法 中草药 样品分析 痕量元素 

分 类 号：R284.1[医药卫生—中药学]