摘要
利用石墨炉原子吸收法,在等温平台条件下利用标准加入法直接测定了高纯铟中的痕量杂质铅和砷.并对石墨炉加热程序中的干燥时间、灰化温度及原子化温度进行了优化,同时也考察了介质酸度的影响.本方法中铅和砷的特征质量分别为37.8 pg和40.7 pg,相对标准偏差平均值分别为2.8%和2.0%,加标回收率分别为85.6%～95.4%和97.3%～105.0%,是测定高纯铟中杂质铅和砷的一种简单、快速、准确的方法.
Trace lead and arsenic in high purity indium were determined by graphite furnace atomic absorption spectrometry with STPF technique. The standard addition method was adapted to eliminate the influence of matrix indium for the determination of lead and arsenic. The drying time, the ashing temperature and the atomizing temperature were optimized, but other conditions of graphite furnace heating were the recommended values of the instrument. The effect of acid was also studied. The characteristic masses of the method for lead and arsenic are 37.8pg and 40.7pg respectively. The average RSDs are 2.8% and 2.0% respectively. The recoveries are in the range of 85.6 ~ 95.4% and 97.3- 105.0% respectively. The experiments showed that it was a simple, quick and accurate method to determine lead and arsenic in high purity indium.
出处
《辽宁大学学报（自然科学版）》
CAS
2005年第4期293-295,共3页
Journal of Liaoning University：Natural Sciences Edition
