电感耦合等离子体原子发射光谱法(ICP-AES)测定矿样中痕量金  

Determination of Trace Au in Mine Sample by Inductively Coupled Plasma Atomic Emission Spectroscopy

作　　者：季春红[1] 李建强[1] 黄文杰[1] 包蕊 郭茹[1] 胡俊杰[1] 

机构地区：[1]北京科技大学应用科学学院,北京100083 [2]北京英纳超导技术有限公司,北京100176

出　　处：《光谱学与光谱分析》2010年第5期1396-1399,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(20876015)资助

摘　　要：建立了电感耦合等离子体原子发射光谱法(ICP-AES)测定低品位金矿样品中痕量金的方法,优化了仪器分析条件,对测定介质、干扰等进行了系统研究,结果标明:在小于10%(φ)王水介质中,所用酸不影响测定;矿中常见的阳离子的干扰,通过用10%盐酸(φ)进行预溶解去除,残留的基体元素对测定没有影响。试样中存在的硅对金208.2nm产生严重的光谱干扰,用硅的251.6nm线进行干扰系数法校正。采用上述条件测定了高硫尾矿中的痕量金,结果与活性炭富集-原子吸收法所得结果一致。在实验条件下,对金矿的检测限为0.10g·t-1。A method for the determination of trace gold by inductively coupled plasma atomic emission spectrometry （ICP-AES） in mine sample was proposed. The instrument parameters were optimized and the media of solution and interferences were studied systemically. The results showed that in less than 10%（φ） aqua regia medium, the acids had no influences on the determination, and after removing common cations in mineral samples by using 10% hydrochloric acid（φ）, the residual matrix elements had no effect on the determination of Au with ICP-AES. The silicon in samples had serious spectral interference to Au 208.2 nm, and the spectral interference was corrected with interference coefficient using the 251.6 nm silicon line. With 10% HCl to remove the matrix and interference correction coefficient to eliminate the interference of silicon, trace gold in high-sulfur tailings samples was determined, the result was identical with the reference values by the method of enrichment with activated carbon-atomic absorption spectrometry. Under the experimental conditions, the detection limit for gold in mine sample was 0.10 g·t^-1.

关 键 词：ICP-AES 痕量金 基体效应 干扰系数校正法 

分 类 号：O657.3[理学—分析化学]