期刊
TALANTA
卷 78, 期 3, 页码 795-799出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2008.12.047
关键词
Solid phase extraction; Polymer inclusion membrane; Di(2-ethyihexyl)phosphoric acid (D2EHPA); Zinc(II) extraction; Zn(II) separation
资金
- Australian Research Council
A polymer inclusion membrane (PIM) is reported consisting of 45% (m/m) di(2-ethylhexyl)phosphoricacid (D2EHPA) immobilized in poly(vinyl chloride) (PVC) for use as a solid phase absorbent for selectively extracting Zn(II) from aqueous solutions in the presence of Cd(II), Co(II), Cu(II), Ni(II) and Fe(II). Interference from Fe(Ill) in the sample is eliminated by precipitation with orthophosphate prior to the extraction of Zn(II). Studies using a dual compartment transport cell have shown that the Zn(II) flux (2.58 x 10(-6) Mol m(-2) s(-1)) is comparable to that observed for supported liquid membranes. The stoichiometry of the extracted complex is shown to be ZnR(2)center dot HR, where R is the D2EHPA anion. (C) 2008 Elsevier B.V. All rights reserved.
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