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A modified method of separating Tl(I) and Tl(III) in aqueous samples using solid phase extraction TEXT SIZE: A A A
In spite of the development of new measurement techniques in recent years, the rapid and accurate speciation of thallium in environmental aqueous samples remains a challenge. In this context, a novel method of solid phase extraction (SPE), involving the anion exchange resin AG1-X8, is proposed to separate Tl(I) and Tl(III). In the presence of diethylene triamine pentacetate acid (DTPA), Tl(III) and Tl(I) can be separated by selective adsorption of Tl(III)-DTPA onto the resin, Tl(III) is then eluted by a solution of HCl with SO2. The validity of this method was confirmed by assays of standard solutions of Tl(I) and Tl(III). The proposed method is shown to have an outstanding performance even in solutions with a high ratio of Tl(I)/Tl(III), and can be applied to aqueous samples with a high concentration of other electrolytes, which could interfere with the measurement. Portable equipment and reagents make it possible to use the proposed method routinely in the field.

Publication name

 CHEMISTRY CENTRAL JOURNAL, 12 10.1186/s13065-018-0502-6 DEC 5 2018


 Xiao, Qingxiang; Rasool, Atta; Xiao, Tangfu; Baveye, Philippe C.

Corresponding author(s) 

 XIAO Tangfu 
 Guangzhou Univ, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China.

Author(s) from IGCAS   XIAO Qingxiang

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