泡塑富集-硫脲解脱电感耦合等离子体质谱法快速测定化探样品中痕量金的条件优化

Optimization of Condition for Foam Plastic Adsorption-Thiourea Relief Inductively Coupled Plasma Mass Spectrometry Determination of Trace Gold in Geochemical Exploration Samples

摘要: 针对化探样品中痕金的电感耦合等离子体质谱法快速测试方法，探讨了吸附酸度、解脱时间、吸附温度等对测试结果的影响。确立了电感耦合等离子体质谱法测定的最佳条件。方法检出限为：0.035 ng/g，准确度△lgC(n=12)为0.01～0.05，精密度RSD（n=12）为4.50～9.64。很好的解决金的快速测定问题，对地矿部门日益增多的化探任务，提高了测试速度，缩短了测试周期，值得推广。

Abstract: In view of the rapid testing of trace gold in geochemical samples by inductively coupled plasma mass spectrometry, the adsorption acidity, relief time, and effect of adsorption temperature on test results were discussed. The optimal conditions for the determination by the inductively coupled plasma mass spectrometry method were set up. The detection limit of the method was 0.035 ng/g, accuracy of △lgC ( n=12 ),0.01～0.05, precision of RSD ( n=12 ),4.50～9.64. This method solves the problem of the rapid determination of gold, improves the testing speed, shortens the test cycle, for the increasing exploration mission of the departments of Geology and mineral resources is worth popularizing.