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208.2 nm产生严重的光谱干扰, 用硅的251.6 nm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0.10 g·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.