泡沫吸附-电感耦合等离子体发射光谱法测定低品位金矿样中痕量金

Determination of Trace Gold in the Low-grade Gold Ore by the Foam Adsorption-Inductively Coupled Plasma Mass Spectrometry (ICP-OES) Method

建立了泡沫塑料吸附无臭灰化处理低品位金矿,电感耦合等离子体发射光谱法(ICP-OES)测定痕量金的方法,解决了由于复杂基体引入的物理效应及光谱干扰导致仪器测定结果精密度及准确度差的缺点。通过对仪器工作参数及测定介质等进行系统试验,并对国家一级标准物质进行分析验证,测定值与参考值相符。试验结果表明,在10%的王水介质中,该方法对低品位金矿样的检出限为0.52ng/g,方法的加标回收率为98.0%-102.7%。

This paper introduced a foam adsorption-ICP-OES method to measure trace gold in the low-grade gold ore.The method solved problems of poor precision and accuracy of equipment and measurements, which were caused by the physical effects and spectral interferences due to the import of complex matrices. Through the test of equipment working parameters and the media, as well as the analysis of the national standard reference materials, measured values were proved to be consistent with reference values. The result shows that in 10% aqua regia medium, the detection limit of the low-grade gold ore was 0.52ng/g, and the recoveries were 98.0%-102.7%.