电感耦合等离子体原子发射光谱(ICP-AES)法测定硫化物矿石中的铜铅锌

建立了电感耦合等离子体原子发射光谱(ICP-AES)法同时测定硫化物矿石中Cu、Pb、Zn三种元素的方法,取代了传统的四酸(HCl+HNO3+HClO4+HF)溶样法,采用简单的盐酸和硝酸溶解矿石,大大缩短了分析时间。选择干扰少且灵敏度高的谱线作为待测元素的分析谱线,采用左右两点扣背景的方法校正光谱干扰和基体匹配方法消除物理干扰,用GBW07162和GBW07163等不同种类的国家一级标准物质进行精密度和准确度实验,测定结果的相对标准偏差都在10%以内,测定结果都在标准值的误差范围内,符合地质矿产开发的要求。

Determination of Copper, Lead and Zinc in Sulphide Ores by Inductively Coupled Plasma Atomic Emission Spectrometry

A method for simultaneous determination of copper, lead and zinc by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The samples were digested with the mixtures of nitric acid and hydrochloric acid, replacing the traditional tetra- acid solution method(HCl+HNO3+HClO4+HF). Moreover, the sample preparation method could greatly shorten analysis time. The spectral lines with little interference and high sensitivity were selected as the analytical lines for tested elements. The physical interference was eliminated via matrix matching method and spectral interference was removed by background deduction from left and right points. The precision and accuracy experiments were carried out with different kinds of national standard materials such as GBW07162 and GBW07163, and the relative standard deviations (RSDs) were basically less than 10%. The results were within the error range of the certified values, which made the method meet the requirement for geology and mineral resources exploitation.