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 | BMC CHEMISTRY, 12 10.1186/s13065-018-0502-6 2018 | Author(s) | Xiao, Qingxiang; Rasool, Atta; Xiao, Tangfu; Baveye, Philippe C. | Corresponding author(s) | XIAO Tangfu tfxiao@gzhu.edu.cn 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; Rasool Atta | View here for the details
|
|
|