【摘要】 铅中微量元素直接影响铅蓄电池使用寿命,本文采用原子吸收光谱法测定铅中的微量元素Cu、Ca、Al.用HNO₃（1+3）溶解样品,用HCl沉淀铅排除铅基干扰,在不过滤的情况下,直接测定上层清液,方法快速简便.通过试样分析及方法检验,结果满意.加标回收率93%～100%,相对标准偏差（n=8）2.4%～8.4%.更多还原

【Abstract】 An AAS method for the determination of trace amounts of Cu、Ca and Al in lead grid is proposed in this paper. The sample is dissolved in HNO3（1+3） ,and the lead in precipitated as PbCl₂ by adding an appropriate amount of HCl. The interference of the matrix element is thus eliminated and the AAS determination is performed by using the supernatant solution with out filtration, The method is proved to be simple and rapid , and the result obtained is satisfactory . The recovery amounts to 93. 0%¹00% and the relative standard deviation is 2. 4%⁸. 4%.更多还原