火试金富集—原子吸收光谱法测定粗银中的金

Determination of gold in coarse silver by fire assay enrichment-atomic absorption spectrometry

摘要: 准确测定粗银中的金量对粗银的交易价值和生产加工都具有重要的现实意义。实验建立了火试金富集—原子吸收光谱法测定粗银中金量的方法，并讨论了不同影响因素对测定结果的影响，确定了最佳试验条件。该方法测定结果的相对标准偏差为0.19 %～0.54 %，加入标准物质回收率为97.00 %~100.10 %，准确度和精密度良好，干扰因素少，适合粗银中金量的测定。

Abstract: Precise determination of gold content in coarse silver bears practical significance for the trade value and processing of the coarse silver.A fire assay enrichment-atomic absorption spectrometry for gold content determination in coarse silver is established through tests and the influence of different factors on the determination results is discussed,and the optimal test conditions are determined.The RSD of the determination results is 0.19 %-0.54 %,the recovery rate of reference materials is 97.00 %-100.10 %,the accuracy and precision are good,interference elements are little.The method is fit for the determination of coarse silver.