Application of hollow cylindrical wheat stem for electromembrane extraction of thorium in water samples

作者：Khajeh Mostafa^*; Pedersen Bjergaard Stig; Barkhordar Afsaneh; Bohlooli Mousa

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2015, 137: 328-332.

DOI：10.1016/j.saa.2014.08.103

• Thorium
• Electromembrane extraction
• Wheat stem
• Water samples

In this study, wheat stem was used for electromembrane extraction (EME) for the first time. The EME technique involved the use of a wheat stem whose channel was filled with 3 M HCl, immersed in 10 mL of an aqueous sample solution. Thorium migrated from aqueous samples, through a thin layer of 1-octanol and 5%v/v Di-(2-ethylhexyl) phosphate (DEHP) immobilized in the pores of a porous stem, and into an acceptor phase solution present inside the lumen of the stem. The pH of donor and acceptor phases, extraction time, voltage, and stirring speed were optimized. At the optimum conditions, an enrichment factor of 50 and a limit of detection of 0.29 ng mL(-1) was obtained for thorium. The developed procedure was then applied to the extraction and determination of thorium in water samples and in reference material.

• 出版日期2015-2-25