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化学光谱法,特别它的半定量方法,已广泛的用于岩石、矿物中金的测定.然而用它来分析含炭的岩石、矿石时,金的测定结果往往偏低.它可以用这些分析对象中所含的有机物对金具有吸附能力来进行解释.用予先灼烧试样的方法,也不能经常保证有机物的完全氧化.即使把灼烧的温度从550～600℃提高到700℃,灼烧时间从1.5小时增加到4小时的情况下也是如此.金的损失是由于试样灼烧后所残留的有机物,在用HCl与HNO_3(3:1)的混合酸处理样品的过程中,吸附了从试样转入溶液中的金,它同有机物和试样的不溶残渣一道被丢弃了.
Chemical spectroscopy, in particular its semi-quantitative method, has been used extensively in the determination of gold in rocks and minerals, however, when used to analyze rocks and ores containing carbon, the determination of gold tends to be low, and it can be used for these analyzes The organic substances contained in the object have the ability to adsorb gold to explain.Use the method of pre-burning the sample, but also can not always ensure the complete oxidation of organic matter.Although the burning temperature from 550 ~ 600 ℃ raised to 700 ℃, The burning time is increased from 1.5 hours to 4 hours.The loss of gold is due to the residual organic matter after the sample is burned, during the treatment of the sample with a mixed acid of HCl and HNO 3 (3: 1) Adsorbed from the sample into the solution of gold, it is with the organic matter and the insoluble residue of the sample was discarded.