原子吸收光谱法测定热激活电池正极粉中钙含量

简述了用一氧化二氮-乙炔火焰原子吸收光谱法测定热激活电池正极粉中钙含量.介绍了钙最佳测定条件以及呈良好线性范围的浓度.同时对干扰因素进行了综合考虑.该方法具有很好的灵敏度、干扰小、重现性好、准确度、精确度均能满足航天热激活电池研制工作的要求.测定样品含钙量相对标准偏差均小于1.0%加标回收率在97%～102%范围.适用于航天热激活电池正极粉中的钙含量的控制分析.

Atomic Absorption Spectrometry to Measure the Content of Calcium in Positive Pole Powder of Thermal Activated Batteries

The application of nitrous oxide-acetylene flame atomic absorbance spectral method to measure the content of calcium in positive powder of thermal activated batteries is studied. The optimum measuring conditions for calcium and potency in which a fine liner range presents, and makes a comprehensive consideration to interference factors was introduced. The method has the advantages of high sensitivity,simple operation, easy master, short analyzing cycle, less interference and good in selectivity and repeatability. The relative standard deviations are all less than 1.0% in ten sample measures, and the standard adding recovery is in the range of 97%～102%. The practice shows that the method is fully suited to measure the cadmium content in positive powder of thermal activated batteries. The proposed method was proved to be a useful instrument analytical technique in nitrous oxide-acetylene flame absorbing spectral method.