The samples were treated with sulphuric acid and then destroyed by perchloric acid and hydrogen peroxide. The samples were dissolved in reverse Aqua regia, and potassium dichromate was added as a protective agent. Without separation on the atomic fluorescence spectrometer, the working conditions of the instrument were selected, and the content of Trace Mercury in minerals was determined directly with SnCl2 as a reducing agent. The correlation coefficient of mercury is 0.9999, the detection limit is less than 0.005ng/mL, and the determination range is (0.0005~6)×10^-6g.
World Nonferrous Metals
atomic fluorescence spectrometry