中文摘要：

研究了在硫酸铵存在下,硫氰酸铵-乙基紫-乙醇体系萃取分离Tl（Ⅲ）的行为.研究表明,在磷酸介质中,Tl（Ⅲ）在水相中与SCN-和乙晶紫所形成的离子缔合物能被乙醇相完全萃取.控制一定的条件,Tl（Ⅲ）能与Al（Ⅲ）、Ni（Ⅱ）、Mg（Ⅱ）、Mn（Ⅱ）、Cu（Ⅱ）、Pb（Ⅱ）、Fe（Ⅲ）、Zn（Ⅱ）等完全分离.对合成水样中铊进行分离和测定,效果良好.

英文摘要：

The extraction behavior of thallium by NH4 SCN-ethyl violet-Ethanol system was studied and proper conditions were selected.The results show that Tl(Ⅲ)can be completely separated from Al(Ⅲ),Ni(Ⅱ), Mg(Ⅱ),Mn(Ⅱ),Cu(Ⅱ),Pb(Ⅱ),Fe(Ⅲ),Zn(Ⅱ)by adding 3.5 g (NH4 )2 SO4 to 1 0 mL 30%(V /V)ethanol solution.Synthetic water samples were tested for separation and determination of thallium,and the results were satisfactory.The method has been applied to the preconcentration and determination of trace Tl (Ⅲ)in water samples and the result of determination is satisfactory.