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含银样品溶解后,调节溶液PH=4,用EDTA掩蔽铜和其他一些离子,周打萨宗CCl_4溶液定量萃取分离银,再经5％NaCl-0.5MHCl溶液的萃取,存在于水相中的银用计时电位溶出分析法测定之,恒电位富集时间为2-10钟分。银的测定范围垮0.025—10μg/mL,此法用于头发和铜矿石中微量银的测定。 用泡沫塑料富集矿样中的金,然后在硫脲溶液中解脱,并在0.1MHCl—0.5MKBr介质中测定金,灵敏度可达0.1μg/10mL.取样为20克计。比法可用于0.005g/吨Au样品中金的测定。
After the silver-containing sample was dissolved, the solution was adjusted to pH 4, copper and some other ions were masked with EDTA, and QASCAR CCl 4 solution was quantitatively extracted to separate silver. After the extraction with 5% NaCl-0.5M HCl solution, Silver is measured by the chronopotentiometry method, and the potentiostatic enrichment time is 2-10 minutes. Determination of silver collapse range of 0.025-10μg / mL, this method is used for determination of trace silver in hair and copper ores. The gold in the mineral sample was enriched with a foam and then released in a thiourea solution and gold was assayed in 0.1M HCl-0.5M KBr medium with a sensitivity of 0.1 μg / 10 mL. The method can be used for the determination of gold in 0.005g / ton Au samples.