DBC-偶氮胂光度法测定人发中微量铋  

Spectrophotometric Determination of Microamounts of Bismuth in Human Hairs by DBC Arsenazo

作　　者：靳晓珠 

机构地区：[1]有色金属桂林矿产地质测试中心

出　　处：《光谱实验室》1999年第2期215-217,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：ＤＢＣ－偶氮胂对铋的灵敏度较高且选择性好，在０．２－１．０ｍｏｌ／Ｌ硝酸介质中与Ｂｉ（Ⅲ）形成配位比为１∶２的紫红色配合物，λｍａｘ＝６３０ｎｍ，ε６３０＝８．８×１０４Ｌ·ｍｏｌ－１·ｃｍ－１。铋量在０—１０μｇ／１０ｍＬ范围内符合比耳定律。用于人发中微量铋的测定，操作简便，结果满意。The colour reaction of DBC arsenazo with bismuth has high sensitivity and good selectivity.In the medium of 0.2-1.0mol/L HNO 3,Bi(Ⅲ) reacts with DBC arsenazo to form a violet red complex. λ max =630nm, ε 630 =8.8×10 4L·mol -1 ·cm -1 .Beer′s law is obeyed in the range of 0 10μg per 10mL of Bi(Ⅲ).The method has been applied to the spectrophotometric determination of microamounts of Bi(Ⅲ) in human hairs with satisfactory results.

关 键 词：DBC 偶氮胂 铋 人发 光度法 测定 

分 类 号：Q584.03[生物学—生物化学]