摘要
本文考查了某些试剂对石墨炉原子吸收法测定痕量镍的增敏作用。选用NH_4VO_3作为基体改进剂,并选择了NH_4VO_3体系的最佳实验条件,使镍在232.0nm处的相对吸收提高了70％,从而提高了方法的灵敏度。其灵敏度为2.2ppb/1％,线性范围为0.01—0.160μgNi/ml。对镍含量为0.0x～0.xx％超基性岩标样和钢标样测定结果满意。
A graphite furnace atomic absorption spectrophotometry ( GFAAS ) is desribed for determination of trace nickel in ore and steel by enhancement effect of NH4VO3.
In determination of trace nickel with GFAAS enhancement effect of some reagents has been studied. NH4VO3 is selected as a matrix modifier for changing the atomization process of sample and raising the sensitivity of the method.The sensitivity is 2.2×lO-8ug/ml 1%.The calibration curve is linear for concentration 0.01-0.16ug/ml Ni.Trace Ni in oreandsteel can directly be measured without using the pre-separ-ation technique.The relative error is +3.5% for the determination of trace nickel in five standard samples. The method is simple and rapid.
出处
《冶金分析》
CAS
CSCD
北大核心
1992年第2期18-21,共4页
Metallurgical Analysis
