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以甲酸还原硅钼酸为指示反应,加入一定量汞(Ⅱ)盐,使金(Ⅲ)的催化活性增强,从而可测定痕量金。该法能测定0.0001—0.007μg的痕量金。
With formic acid reduction silicomolybdic acid as the indication reaction, adding a certain amount of mercury (Ⅱ) salt, so that the catalytic activity of gold (Ⅲ) increased, which can be measured trace gold. The method can determine 0.0001-0.007 μg of trace gold.