It is clear:usingNH 4F as a shelter agent,the result of lead content in raw lead and Pb-Sb alloys is not affected by foreign matter,the result is accurate,and only one time needs to analyze.

• 发现本方法中以 NH4F为掩蔽剂 ,在分析粗铅及铅锑合金中铅含量时不受杂质因素的干扰 ,具有分析结果准确、不需重复分析等优点。