电感耦合等离子体发射光谱法测定磷矿石中微量有毒元素铅砷镉

Determination of Trace Toxic Elements of Lead, Arsenic and Cadmium in Phosphate Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry

摘要: 用电感耦合等离子体发射光谱法测定磷矿石中微量有毒元素铅、砷和镉，并对溶样条件及共存元素干扰和仪器工作条件进行了试验。方法检出限为Pb 0.042 mg/L、As 0.053 mg/L、Cd 0.006 mg/L；相对标准偏差为（RSD，n=11）Pb 0.86%、As 1.36%和Cd 1.08%；回收率为Pb 109.3%、As 94.0%和Cd 90.0%。方法用于分析磷矿石标准样品和出口磷矿石检验样，分析结果与其他方法一致，能够满足日常检验的要求。

Abstract: A method for the simultaneous determination of trace elements of lead, arsenic and cadmium in phosphate ores by inductively coupled plasmaatomic emission spectrometry (ICP-AES) was established. The detection limits of the method are 0.042 mg/L for lead, 0.053 mg/L for arsenic and 0.006 mg/L for cadmium. The recoveries of lead, arsenic and cadmium are 109.3%, 94.0% and 90.0% with precision (RSD，n=11) of 0.86%, 1.36% and 1.08% respectively. The method has been applied to the routine inspection of lead, arsenic and cadmium in phosphate ores with satisfactory results.