电感耦合等离子体原子发射光谱(ICP-AES)法测定铅锌精矿中铊

Determination of Thallium in Lead-Zinc Concentrate by Inductively Coupled Plasma Atomic Emission Spectrometry

采用HCl-HNO_3-HF-HClO_4四种酸溶解铅锌精矿样品,稀释后用电感耦合等离子体原子发射光谱(ICP-AES)法测定其中的铊元素,测定范围0.005%~0.05%。实验确定了介质酸浓度、干扰元素的校正方法。方法相对标准偏差(n=7)为1.3%~4.8%,加标回收率为93.7%~102%,方法干扰少、快速、结果准确,适用于大批量铅锌精矿样品中铊的测定。

The contents of T1 in lead-zinc concentrate samples were determined by ICP-AES after the samples were dissolved in nitric acid, hydrochloric acid, hydrofluoric acid and perchloric acid and the solution was diluted. The measurement range was from 0.005% to 0.05%. By experiments, the appropriate solution acidity and the correction method for interference elements were determined. The relative standard deviations（n=7） were between 1.3% and 4.8%, and the recoveries were in the range from 93.7% to 102%. Due to less interference, fast speed and accuracy, the method is applicable for the determination of T1 concentration for the batch samples of lead-zinc concentrate.