原子荧光光谱法测定铁矿石中的铅

采用混酸溶解铁矿,加入掩蔽剂消除测试时某些元素的干扰,并用增感剂增加生成铅烷的几率,用原子荧光光谱仪测定试液中铅的含量。通过试验确定了最佳酸度及仪器测定最佳条件,对干扰元素的允许量进行了研究。本方法检出限为0.94μg/L,精密度为4.5%,线性范围为0~80μg/L,回收率为95.5%以上。

Determination of Lead in Iron Ores by Atomic Fluorescence Spectrometry

Iron ores were dissolved with mixed acid. The masking reagents were added in order to eliminate the disturbance of some elements, and sensitizing agent was used to increase the probability of alkyl lead generation. The content of Pb in it was determined by Atomic Fluorescence Spectrometry (AFS). The best acidity and the optimum working conditions were tested by experiments. The allowance of interference elements was also investigated. The results showed that the detection limit of the method was 0.94 μg/L, the relative precision was 4.5%, the linear area was 0~80 μg/L, and the recovery was up to 95.5% or more.