Thallium speciation study with solid phase extraction technique

In this study, separation and speciation of Tl (I) and Tl (III) species from the solution with using various commercial resins (Amberlite IR-120 H+ form (Fluka) resin and Dowex Monosphere 550 A (OH), anion exchange resin) by solid phase extraction (SPE) technique.Preconcentration and speciation of Tl (I) and Tl (III) ions were investigated in the of are mentioned resins using SPE column technique. Enfluents of pH, volume, flow rate, matrix components of solution and type, volume and concentration of elutionsolution were investigated for the element studied over the speciation and preconcentration. Thus, optimum conditions were determined for seperation and preconcentration of Tl (I) and Tl (III) species in the solution. This method was applied fort he determination of Thallium species in synthetic and river water samples. The method was also applied to the Cerified Reference Material containing trace Thallium element as river sediment sample for the purpose of method validation. Percentages of Thallium recoveries were calculated using CRM. Comparison of the results obtained from the experimental data were made using computer simulation program Minteqa2.As a result, a new, simple, highly sensitive, selective and low cost spectrophotometric method has been developed to determine trace amounts of thallium species. In addition, it was found that both Tl (I) and Tl (III) species can be studied in a wide range of pH. Thus, the experimental results showed that Dowex Monosphere 550 A (OH) anion exchange resin can be used to separate Tl (I) and Tl (III) species. This developed method was applied to synthetic solutions, real sample solutions, and standard referans materials for thallium speciation and determination study.