萃取-非水介质氢化物发生-ICP-AES中的干扰及Ni-Fe基合金的分析

DETERMINATION OF ARSENIC AND ANTIMONY IN NICKELIRON BASED ALLOY BY EXTRACTION-HYDRIDE GENERATION IN NON-AQUEOUS MEDIUM AND ICP-AES

本文结合溶剂萃取研究了非水介质中氢化物发生-ICP-AES的分析条件、干扰等因素的影响。利用KI^+H_2SO_4/MIBK萃取体系将As,Sb,Bi萃取到MIBK中而与基体元素分离,然后将该有机相与甲酸按等体积混合后,即可直接进行氢化物发生-ICP-AES分析。还对影响萃取和氢化物发生的一些因素及共存元素的干扰进行了讨论。该方法应用于Ni-Fe基合金中As和Sb的分析,取得了较满意的结果。

Hydride generation technique in non-aqueous medium combined with solvent extraction and ICP-AES was studied. As. Sb, Bi could be extracted into methylisobutylketone(MIBK) phase from KI/H_2SO_4 solution, and determined by hydride generation-ICP-AES after mixing the MIBK phase with formic acid.Interference of co-existent elements and some factors influencing extraction and hydride generation were also discussed.The proposed method was applied to the determination of As and Sb in a Ni-Fe based alloy sample.