Donaldson E M
Mineral Sciences Laboratories, Canada Centre for Mineral and Energy Technology, Department of Energy, Mines and Resources, Ottawa, Canada.
Talanta. 1977 Jul;24(7):441-5. doi: 10.1016/0039-9140(77)80126-4.
A method for determining 0.0001-0.10% of selenium in copper, nickel, molybdenum, lead and zinc sulphide concentrates is described. After sample decomposition, selenium is reduced to the quadrivalent state by heating in a 4M hydrochloric acid-5M sulphuric acid medium, then extracted into chloroform as the xanthate, and ultimately determined spectrophotometrically with 3,3'-diaminobenzidine. Small amounts of iron, lead and copper, and an appreciable amount of molybdenum are co-extracted as xanthates but do not interfere. More than 5 mg of antimony will cause low results. The proposed method was developed primarily for concentrates, but it is also applicable to high-purity copper.
本文描述了一种测定铜、镍、钼、铅和锌硫化物精矿中0.0001 - 0.10%硒的方法。样品分解后，在4M盐酸 - 5M硫酸介质中加热将硒还原为四价态，然后以黄原酸盐形式萃取到氯仿中，最终用3,3'-二氨基联苯胺进行分光光度法测定。少量的铁、铅和铜以及相当量的钼会以黄原酸盐形式共萃取，但不产生干扰。超过5mg的锑会导致结果偏低。所提出的方法主要是针对精矿开发的，但也适用于高纯铜。
