氯化钠-硝酸溶矿—化学光谱法测定化探样品中的痕量金

Study on Using Sodium Chloride-Hydrogen Nitrate to Solute Ores and Using Chemical Spectrographic Method to Test Trace Elements of Geochemical Samples

化探样品经灼烧去除易挥发组分及有机物后 ,用硝酸和氯化钠分解 ,活性炭吸附柱分离富集 ,采用发射光谱分析法测定金。方法的检出限为 0 .2 5ng/g。用化探金标准物质进行测定 ,其结果与标准值相符 ,在允许误差范围之内 ,标准物质平行测定 1 5次的相对标准偏差为1 4.4%。

After igniting to get rid of easy-volatile components and organic matter, using hydrogen nitrate and sodium chloride to solute, and using activated carbon adsorbed column to select and concentrate, using emission spectrographic analysis to test gold element, the detection limit is 0.25ng/g. The result is correspond with gold standard value being tested by geochemical exploration. Among permitted error bar, relative standard departure is 14.4% after 15 times tests of standard materials.