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.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Author information
Authors and Affiliations
Additional information
Electronic Publication
Rights and permissions
About this article
Cite this article
Vachirapatama, N., Macka, M. & Haddad, P.R. Separation and determination of vanadium in fertiliser by capillary electrophoresis with a light-emitting diode detector. Anal Bioanal Chem 374, 1082–1085 (2002). https://doi.org/10.1007/s00216-002-1564-8
Received:
Revised:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s00216-002-1564-8