Determination of Vanadium(IV) and Vanadium(V) in benfield samples by IEC with conductivity detection
In this study, the determination of vanadium valence state, V(IV) and V(V) has been achieved using ion-exchange chromatography with conductivity detector. In this method, V(IV) was determined as V(IV)-EDTA complex and V(V) as vanadate ion. Determination of V(IV) was successfully done using 3 mM carb...
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| Main Authors: | , , |
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| Format: | Article |
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Springer Link, Vieweg Verlag
2010
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/25097/ http://dx.doi.org/10.1365/s10337-010-1630-x |
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| Summary: | In this study, the determination of vanadium valence state, V(IV) and V(V) has been achieved using ion-exchange chromatography with conductivity detector. In this method, V(IV) was determined as V(IV)-EDTA complex and V(V) as vanadate ion. Determination of V(IV) was successfully done using 3 mM carbonate/bicarbonate/EDTA at pH 8.6 as the eluent. The additive, EDTA in the mobile phase did not seem to interfere with the V(IV) analysis. The detection of V(V) was achieved with 5 mM disodium hydrogen phosphate buffer at pH 10.4. A linear calibration graph over VO3− and V(IV) with concentration ranges 5–15 mg L−1 gave the detection limit at 0.09 and 0.1 mg L−1, respectively. Both V(IV) and V(V) were successfully determined in Benfield sample, with concentrations of V(IV) and V(V) at 4 and 11,000 mg L−1, respectively. |
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