NDLI: Cloud point and solid phase extraction of vanadium in surface and bottled mineral water samples using 8-hydroxyquinoline as a complexing reagent

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Cloud point and solid phase extraction of vanadium in surface and bottled mineral water samples using 8-hydroxyquinoline as a complexing reagent

Content Provider	Springer Nature Link
Author	Khan, S. Baig, J. A. Kolachi, N. F. Afridi, H. I. Kazi, T. G. Shah, A. Q. Kumar, S. Kandhro, G. A.
Copyright Year	2011
Abstract	Cloud point extraction (CPE) and solid phase extraction (SPE) methods were developed for the determination of μg l$^{−1}$ of vanadium ions in surface, tap and bottled mineral water samples, based on the rapid reaction of vanadium(V) with 8- hydroxyquinoline (8-quinolinol) at pH 3–5. Both the sensitive extraction methods were successfully employed for the preconcentration of V in real samples. For CPE, V complexed with 8-quinolinol and then was entrapped in non-ionic surfactant Triton X-114, while for SPE, V was adsorbed on XAD -2 impregnated with 8-quinolinol. The experimental conditions for SPE (pH, eluent, and contact time between the liquid sample and the resin) and CPE (pH of sample solution, concentration of 8- quinolinol and Triton X-114, equilibration temperature and time period for shaking) were investigated in detail. The validity of SPE/CPE of V was checked by certified reference material of water (SRM-1643e). The extracted surfactant-rich phase (200 μl) was mixed with 200 μl of HNO$_{3}$ in ethanol and this final volume was injected into electrothermal atomic absorption spectrometry with different modifiers. Under these conditions, the preconcentration of 25 ml sample solution allowed the raising of an enrichment factor of 100 and 10 folds for CPE and SPE, respectively. The concentration of V in surface water (river and lake), tap water and bottled mineral water samples was found to be in the range of 1.30–19.9, 1.05–5.25 and 0.67–1.21 μg l$^{−1}$, respectively.
Starting Page	897
Ending Page	907
Page Count	11
File Format	PDF
ISSN	1735207X
Journal	Journal of the Iranian Chemical Society
Volume Number	8
Issue Number	4
e-ISSN	17352428
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-08-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Surface and bottled mineral water samples Cloud point extraction Analytical Chemistry 8-Quinolinol Physical Chemistry XAD-2 Vanadium Biochemistry Inorganic Chemistry Triton X-114 Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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