碱性锌锰电池用锌粉中杂质元素的质谱分析

摘要

An inductively coupled plasma mass spectrometry (ICP-MS) with an octopole reaction/ollision cell (ORS) and shield torch system was employed for the determination of impurity elements in zinc powder for alkaline Zn/MnO2 battery. The elements of Mg,Cr,Mn,Fe,Co, Ni, Cu, As, Mo, Cd,Sb and Hg were determined by introducing the hydrogen gas or helium gas into the ORS to eliminate the interference of multi-element molecules and ions. Sc, Ge, In and Tb were used to correct the matrix interference and drift. Under the optimal conditions,the detection limits of the impurity elements were 0.001 ~ 0.031 μg/L,the relative standard deviation was 0.84% ~ 2.36% ,the recovery of the samples was 91.8% ~ 106.0% .The method was easy,rapid and accuracy.%利用带八极杆碰撞/反应池(ORS)和屏蔽炬技术的电感耦合等离子体质谱(ICP-MS)分析,测定碱性锌锰电池用锌粉中Mg、Cr、Mn、Fe、Co、Ni、Cu、As、Mo、Cd、Sb和Hg等12种杂质元素的含量.向ORS中引入氢气和氦气,消除多原子离子的干扰,以50 μg/L的Sc、Ge、In及Tb为内标元素,校正基体干扰和漂移.待测元素的检出限为0.001～ 0.031 μg/L,相对标准偏差为0.84％ ～ 2.36％,样品的加标回收率为91.8％～106.0％.方法简便、快速,结果准确可信.