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

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.