Zee-Man石墨炉原子吸收法测定生铁中痕量砷和铅

Determination of trace As and Pb in pig iron with Zee-Man graphite furnace atomic absorption spectrophotometer

采用日立公司Z-2000原子吸收光谱仪对生铁中痕量砷和铅进行测定并讨论相关的实验条件,石墨管性能比较、酸的选择、试剂空白的控制、干扰因素及消除、基体改进剂的选择、加热参数的选择、共存离子的影响等。用10g/LNi(NO3)2作基体改进剂,提高砷的灰化温度,检测信号得到扩大,回收率为102%和105%。方法的相对标准偏差为4.73%和4.09%,As的线性范围为0～80μg/L,Pb的线性范围为0～100μg/L。

The trace As、Pb in pig iron was determined by HITACHI Z-2000 atomic absorption spectrophotometer and relative experiment condition was discussed.Results showed that the content of As was determined by using 10 g/L Ni (NO3)2 ,the recovery was in range of 102% and 105%,the relative standard deviation of the method was 4.73% and 4.09%. The calibration graph is in the range of As 0-80 μg /L,Pb 0-100 μg/L. The method was suitable for the determination of trace As、Pb in pig iron with the advantages of being simpl...