| 一种用于化探金异常检查的痕量金的现场分析方法 |
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| 引用本文： | 卢荫府.一种用于化探金异常检查的痕量金的现场分析方法[J].物探与化探,1990,14(6):464-469. |
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| 作者姓名： | 卢荫府 |
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| 作者单位： | 地矿部物化探研究所 |
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| 摘 要： | 作者通过对实际样品的溶解试验,提出用7%硫脲—15～20%硫酸—1%过氧化氢及2克氟化物于室温下溶解样品中的金,经活性炭负载的泡沫塑料富集后灰化,用盐酸—过氧化氢溶解灰份中的金,使用改进的微珠析出法比色,取10g样品,可测定0.001—10g/t范围内的金。方法较为简便和灵敏,可在普查分队驻地进行,每一工作日约可测定50个样品,由于避免了使用王水分解样品的刺激味,具有广阔的应用前景。
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| 关 键 词： | 化探 金 异常 痕量 |
AN ON-THE-SPOT TRACE GOLD ANALYTICAL METHOD FOR REEXAMINATION OF GEOCHEMICAL GOLD ANOMALIES |
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| Institution: | Institute of Exploration Geophysics and Geochemistry, Ministry of Geology and Mineral Resources |
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| Abstract: | Based on experimentation on solution of samples, the author presents a method for analysing trace gold. The procedure is like this: the gold in the sample is dissolved at room temperature in 7% thiourea -15-20% sulfuric acid -1% hydrogen peroxide and 2g fluoride, and is enriched by foamed plastic loaded by active carbon, which is then ashed; gold in ashed materials is dissolved in hydrochloric acid-hydrogen peroxide, and colorimetric analysis is subsequently performed with improved bead separation method. In this way, gold content in the range of 0.001-10g/t can be determined for a sample 10g in weight. The method is extremely simple, convenient and sensitive, and can be conducted at the encampment of a reconnaissance team with the efficiency of determining 50 samples per day. As this method can avoid horrible smell given off when aqua regia is used to dissolve a sample, its application will surely have broad prospects. |
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