用N_2O-C_2H_2火焰原子吸收光谱法测定电解液中锂

Measurement of lithium in electrolyte solution by N_2O-C_2H_2 flames atomic absorption spectrometer

简述运用N2O-C2H2火焰原子吸收光谱法进行镉镍电池电解液中锂含量的测定，并介绍了锂最佳测定条件及呈良好线性范围的浓度。同时对样品的干扰因素、消化处理条件，在综合分析的基础上提出了有效的测定方案。该测定方法灵敏度好，准确度与精密度均能满足镉镍电池研制工作的要求。测定样品锂含量相对标准偏差均小于1．0％（测定次数n=10），标准加入回收率均在97．0％，100．0％（n=6）范围内，达到了实验室分析质量与质量控制的要求，适用于电解液中锂含量的控制分析和样品系统分析。

This paper studied the measurement of lithium content in electrolyte solution of Cadmium nickel battery by using the N2O-C2H2 flame atomic-absorption spectroscopy and process synthetically considering measuring conditions and factors.Tiffs method possesses many advantages such as high sensitivity and accuracy, less interference and good repeatability and selectivity.The deviation RSD〈 1.0% comparing to standard value.The standard adding recovery is in the range of 97.0% ～100.0% .The use of the method fully suited to the control of lithium content in electrolyte solution of Cadmium nickel battery. Analysis for sample system has obtained good effect in practice.