铋(Ⅲ)—硫氰酸盐—孔雀绿高灵敏显色体系的研究  

Study on High Sensitive Colour Reaction of Bi (Ⅲ)-SCN~—MG—PVA System

作　　者：赵琦华[1] 徐其亨[1] 佟玲[1] 

机构地区：[1]云南大学化学系

出　　处：《冶金分析》1989年第5期11-13,共3页Metallurgical Analysis

摘　　要：文中推荐了一个用于分光光度测定痕量铋的灵敏方法,其测定范围为1～20μgBi(Ⅲ)/50ml。该方法已用于纯铅和铅黄铜中铋的测定,结果令人满意。A sensitive method for the spectrophotometric determination of trace bismuth is studied. In solu~ tjon containing 0.01-0.04 M H2SO4, in the presence of polyvinyl alcohol(PVA), Bi (Ⅲ), KSCN and malachite green (MG) f orm a soluble mixed ion associated complex. The complex is measured at 620 am with a molar absorptivity of 7.1x105. The system obeys Beer's law in the range of 1-20g Bi(Ⅲ) /50ml. The method has been used for the determination of trace bismuth in pure lead and alloy

关 键 词：铋 光度法 硫氰酸盐 孔雀绿显色 

分 类 号：O614.532[理学—无机化学]