在氨性介质中原子吸收法测定金精矿中的银和铜

Determination of silver and copper in gold concentrate by atomic absorption spectrometry in the present of ammoniacal medium

研究了在氨性介质中采用火焰原子吸收分光光度法测定金精矿中的银和铜。结果表明 ,矿样经盐酸、硝酸预处理 ,在pH 9～ 1 0的氨性介质中 ,以磷酸二氢钾、酒石酸为掩蔽剂消除Fe、Pb、Zn等共存离子的干扰 ;采用原子吸收法测定银和铜 ,其方法的RSD分别为Ag 1 .33%、Cu 2 .30 %。该方法具有操作简单快速、准确度高、成本低等特点。经矿样验证 ,分析结果可满足选冶工艺生产的要求。

The experiment of determination of silver and copper in gold concentration was made by atomic absorption spectrometry in the present of ammoniacal medium. The results indicate that, after samples being pre treated with hydrochloric and sulfuric acid, at pH 9～10 in the present of ammoniacal medium, using potassium dihydrogen phosphate, tartaric acid as masking reagent for removing the interference by co existence ions, such as Fe, Pb, Zn and etc.; detection of silver and copper was conducted by atomic absorption spectrometry, and which revealed analysis RSD of Ag 1.33% and Cu 2.30% respectively. The method has characteristics of easy and quick preparing with high accuracy and low cost. Through ore samples verification, the analysis results could satisfy the production requirements at processing plant.