泡沫吸附-火焰原子吸收光谱法测定粗硒中的金

Determination of gold in crude selenium by foam adsorption-flame atomic absorption spectrometry

采用标准方法火试金重量法测定粗硒中金时,操作繁琐、耗时长、检测效率低,不适用于冶炼企业大批量样品快速分析检测。本文研究了采用聚氨酯泡沫塑料吸附-火焰原子吸收光谱法测定粗硒中金含量方法的可行性。研究表明:试样经硝酸+王水溶解,泡塑吸附,硫脲解脱后,在波长242.80nm下采用FAAS测定金的方法,测定结果的相对标准偏差为0.77%~2.23%,加标回收率为97.3%~102.8%,且与标准方法测定结果一致,适合于冶炼企业快速测定批量粗硒样品中金。

The standard fire assay gravimetric method for the determination of gold in crude selenium is cumbersome,time-consuming and inefficient,and is not suitable for rapid analysis and detection of large quantities of samples in smelting enterprises.The feasibility of determination of gold content in crude selenium by polyurethane foam adsorption-flame atomic absorption spectrometry was studied.The research shows that:After the samples were dissolved by nitric acid+aqua royalty,foam plastic adsorption,and thiourea release,the FAAS method was used to determine gold at 242.80nm.The relative standard deviation of the results was 0.77%~2.23%,and the recovery rate was 97.3%~102.8%,which was consistent with the results of the standard method.It is suitable for rapid determination of gold in bulk crude selenium samples in smelting enterprises.