PDF 293.pdf.pdf | Request a copy Full text restricted Available under University of Tasmania Standard License.

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 time100 s. 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 Type:	Article
Authors/Creators:	Vachirapatama, N and Macka, M and Haddad, PR
Keywords:	Capillary electrophoresis, Fertiliser, Vanadium, Ternary complexes
Journal or Publication Title:	Analytical and Bioanalytical Chemistry
ISSN:	1618-2642
DOI / ID Number:	https://doi.org/10.1007/s00216-002-1564-8
Additional Information:	The original publication is available at www.springerlink.com
Item Statistics:	View statistics for this item

Actions (login required)

Item Control Page