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烷基硫醚和烷基亚砜是近几年才逐步应用于分析化学中的一类新型萃取剂。这类萃取剂对贵金属(以及铀钍、稀土)有极好的选择性。有人用二烷基二硫醚R-S-S-R等多种不同结构的烷基硫化物萃取金、银、钯,除金、银、钯外,其它元素几乎都不被萃取。我们曾试验用含有烷基硫化物的大蒜浸液(甲苯溶液)萃取金、银、铂、钯,萃取效果是很好的。此外,用石油硫化物萃取贵金属也是很有效的。
Alkyl thioethers and alkyl sulfoxides are a new class of extractants that have been gradually applied to analytical chemistry in recent years. Extractants of this type have excellent selectivity to precious metals (as well as uranium and thorium, rare earths). Some people with dialkyl disulfide R-S-S-R and other alkyl sulfide sulfide structure of different extraction of gold, silver, palladium, in addition to gold, silver, palladium, the other elements are almost not extracted. We have experimented with the extraction of gold, silver, platinum, palladium with garlic extract (toluene solution) containing alkyl sulfide, the extraction effect is very good. In addition, the extraction of precious metals with petroleum sulfides is also very effective.