地质样品中金、银、铊等元素的连续原子吸收光谱法测定

Consecutive Determination of Trace Elements Gold. Thallium and Silver in Geosamples by AAS

本文提出了一个一次称样连续测定金、银、铊的简便、快速的新方法。该法是以泡塑吸附金、铊，使银等定量地保留在溶液中。泡塑上的铊用ＥＤＴＡ解脱后，再用硫脉溶液继续解脱金，然后，采用原子吸收光谱法连续测定金、银、铊。方法用于黄铁矿、方铅矿等单矿物及岩石、土壤样品中ｘｎｇ／ｇ～ｘｘｘμｇ／ｇ金、银、铊的测定，获得满意结果。

A simple and rapid method for the determination ofAu,Tl and Ag is described. In a sample solution Au andTl are quantitatively sorbed on polyurethan foam but Agis quantitatively kept in the solution , then Tl is desorbedwith EDTA solution, Au is desorbed with H_2NCSNH_2solution. Au,Tl and Ag are determined by flameless orflame AAS. Using this method Au, Tl and Ag in the rangefrom x ng/g～xxxμg/g in rocks,soil,pyrite,galend, etc. can be determined. It has been applied to the analysis ofstandard reference sam ples GBW and GSS with satisfac-tory results.