活笥银粉中微量铜铁的测定

提出用空气－乙炔火焰原子吸收光谱法来测定银锌电池活性银粉中的微量铜铁，并对测定条件和干扰因素进行了综合考虑，该测定方法具有灵敏度、精确度高，干扰小，选择性和重现性好等优点。测定样品微量铜铁含量的相对标准偏差均小于１.5%(n=8）。标准加入回收率均在（９７.00-102.00)%(n=5)范围内，完全适用于银锌电池活性银粉中微量铜铁含量的控制和样品系统分析，实际应用中取得了很好的效果。

The Measurement of Copper and Iron Trace Content in Active Silver Powder

This paper studies the measurement of copper and iron trace content in active silver powder by using the air-C2H2 flame atom-obsorption spectrum and process synthetically considering measuring conditions and factors. The method possesses many advantages such as high sensitivity and accuracy, less interference and good repeatability and selectivity. The deviation RSD＜1.5%（n=8）compared with standard value. The standard adding recovery is in the range of (97.00～102.00)%(n=5). The use of the method fully suited to the control of copper and iron trace content in active silver powder and the analysis for sample system has obtained good effect in practice.