氢化物发生-原子吸收光谱法分析钢中砷锑铋

Determination of arsenic,anti mony and bismuth in steel by hydride generation atomic absorption spectro scopy

用自制的氢化物循环发生式装置 ,测定铋的下限可达 0 0 0 0 0 0 2 %。本文研究了砷、锑的预还原法及砷、锑的不预还原法 ;使氢化物发生原子吸收测砷、锑的方法在不同含量时具有互补性 ,既考虑到不同含量时有足够灵敏度 ,精确度 ;又考虑到操作上的更简便易行。砷、锑方法可测下限达 0 0 0 0 0 3 %。

A practical method for HG AAS determination of Bi, As and Sb in steel was presented in this pape r.By using a circulating type hy dride generator designed by the au thor,a remarkably lower limit of d etection of 2×10 -6 % for Bi was achi eved Both the pre reductive method s and non pre reductive methods fo r As and Sb were studied in detail ,the two ways have the complementa rity on the different ranges of co ntent This makes the methods easie r in operation,sensitivity, accurac y and convenience The lower limits of detection o f 3×10 -5 % for As and Sb may be att ained