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Separation and determination of vanadium in fertiliser by capillary electrophoresis with a light-emitting diode detector

Citation

Vachirapatama, N and Macka, M and Haddad, PR, Separation and determination of vanadium in fertiliser by capillary electrophoresis with a light-emitting diode detector, Analytical and Bioanalytical Chemistry, 374, (6) pp. 1082-1085. ISSN 1618-2642 (2002) [Refereed Article]

DOI: doi:10.1007/s00216-002-1564-8

Abstract

A method has been developed for determination of vanadium, as an anionic ternary complex of vanadium(V) with 4-(2-pyridylazo) resorcinol (PAR) and hydrogen peroxide, after separation by capillary electrophoresis (CE). The optimum conditions for the formation of the ternary complex were acetate buffer (3 mmol L-1) at pH 6 containing 0.15 mmol L-1 PAR and 7.1 mmol L-1 H2O2. The CE separation was conducted using 15 mmol L-1 acetate buffer at pH 6 as the background electrolyte; the separation potential was -30 kV and the injection time 100s. The vanadium complex was detected photometrically at 568 nm, by use of a light-emitting diode (LED); the detection limit was 19 ppb. The method was applied to the analysis of vanadium in fertilisers. Clean-up of the digested fertiliser sample, with Sep-Pak C18 coated with tetrabutylammonium hydroxide, before analysis was used to remove matrix ions which otherwise caused electrophoretic de-stacking. Vanadium levels found in the fertiliser samples by use of the CE method were found to be comparable with results obtained by HPLC and ICP-MS.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Vachirapatama, N (Dr Narumol Vachirapatama)
Author:Macka, M (Professor Mirek Macka)
Author:Haddad, PR (Professor Paul Haddad)
ID Code:25298
Year Published:2002
Web of Science® Times Cited:29
Deposited By:Chemistry
Deposited On:2002-08-01
Last Modified:2011-08-02
Downloads:0

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