HUANG Hui-qin,ZHANG Zhi-xi,WANG Shuang-shuang

(Jiuquan Laboratory Center, Northwest Bureau, China Metallurgical Geological Bureau, Jiuquan 735009,China)

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.

Key words: foamed plastic adsorption; thiourea relief; inductively coupled plasma mass spectromer; fast testing; trace metals; condition optimization

E-mail: hhq8271@163.com

Analysis and Testing Technology and Instruments, Vol. 18, No. 3, 2012,149-153