用N_2O-C_2H_2原子吸收光谱法测定纯银中的铁

Measurement of Iron Content in Pure Silver for Ag-Zn Cells by N_2O-C_2H_2 Flame Atomic Absorption Spectrometry

作者提出运用N2O-C2H2火焰原子吸收光谱法测定银锌电池纯银中的铁含量。介绍了最佳测定条件以及呈良好线性范围的浓度。同时对样品的消化处理条件,测定中的干扰因素进行了综合考虑。方法的灵敏度好,其准确度与精密度更好的满足银锌电池研制工作的要求。测定样品铁含量相对标准偏差均<1.0%(测定次数n=6)。加标回收率均在97%～100%(n=6)。适用于银锌电池纯银中铁的测定。

A new method of N2O-C2H2 flame atomic absorption spectrometry to measure iron content in He pure silver of silver-zinc cell was studied. The optimum conditions for measuring iron content and the concentration for presenting a fine linear range were introduced. The comprehensive interference factors were considered. The method has the advantages of high sensitivity, less interference and good selectivity and reproducibility. The relative standard deviations are all less than 1.0%, in measurements of six times, and the standard recovery is in the range of 97%～100%. It meets the quality requirement of instrumental analysis in laboratory.