Steger H F, Desjardins L E
Mineral Sciences Laboratories, Canada Centre for Mineral and Energy Technology, Department of Energy, Mines and Resources, Ottawa, Canada.
Talanta. 1977 Nov;24(11):675-9. doi: 10.1016/0039-9140(77)80064-7.
A method has been developed to determine sulphate and thiosulphate in small amounts of the oxidation products of sulphide minerals. The sample is treated with ammonium sulphide solution to promote ion-exchange between sulphide ion and the sulphur-bearing anions of the oxidation products. Sulphate is determined alone and then all other sulphoxy anions are oxidized to sulphate and determined as such. The non-sulphate anions are reported as thiosulphate. The relative error is about 10% or less for 2 mg or more of sulphoxy anion. Although this method does not yield exact results with respect to sulphite or polythionates, a clearer understanding of the oxidation of sulphide minerals is now available.
已开发出一种方法来测定硫化物矿物少量氧化产物中的硫酸盐和硫代硫酸盐。将样品用硫化铵溶液处理，以促进硫离子与氧化产物中含硫阴离子之间的离子交换。先单独测定硫酸盐，然后将所有其他亚硫酸根阴离子氧化成硫酸盐并进行测定。非硫酸根阴离子按硫代硫酸盐报告。对于2毫克或更多的亚硫酸根阴离子，相对误差约为10%或更小。尽管该方法对于亚硫酸盐或连多硫酸盐不能得出精确结果，但现在对硫化物矿物的氧化有了更清晰的认识。
