地质样品中微量锑的树脂相分光光度法测定研究

Determination micro stibonium in geological samples by resin phase spectrophotometry

地质样品中微量锑的树脂相分光光度法测定研究马美玲１杨胜科１耿征２（１西安地质学院应用化学系，西安７１００５４；２陕西师范大学化学系，西安７１００６２；第一作者，女，３４岁，讲师）树脂相分光光度法近年来已有文献报道［１，２］，利用显色树脂相测定，使分离...

A high sensitive and convient spectrophotometric method for determination of micro stibonium with rosin phase is decribed. The stibonium forms ayellow comples anion with I - in the medium of 1.8 mol/L H 2SO 4 5% the critric acid and the thiocarbamide. The complex anion can be absorbde by D 301 resin. Putting the resin into 5mm cell and determination its absorbance on the spectrophotometer. The wavelength of absorption maximum is 425 nm. Beer′s law is obeyed for 0～40 μg of stibonium in 0.5 g resin. The method has been applied to the determination of stibonium in geological samples with satisfactory result.