HPLC analysis of Cr, V and Mo using pre- in combination with on-column derivatisation by oxine, bipyridine and H<sub>2</sub>O<sub>2</sub>期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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HPLC analysis of Cr, V and Mo using pre- in combination with on-column derivatisation by oxine, bipyridine and H₂O₂

Authors:	Yi-he Wu and Georg Schwedt

Institution:	(1) Shanghai Institute of Mechanical Engineering, 516 Jun Gong Lu, 200093 Shanghai, People's Republic of China;(2) Institute of Food and Analytical Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-7000 Stuttgart 80, Federal Republic of Germany

Abstract:	Summary The HPLC behaviours of Cr(VI), Mo(VI) and V(V) peroxo complexes in a H₂O₂-8-hydroxyquinolinebipyridine system were studied by using pre-column in combination with on-column derivatisation. The chromatograms of Cr(VI), Mo(VI) and V(V) show them to be CrO^2– ₄, oxine-Mo peroxo and oxine-V-bipyridine peroxo complexes, respectively, and were used for the separation, identification and determination of Cr(VI), Mo(VI) and V(V) using acetonitrile-water as mobile phase. The calibration curves obtained for 20 l injections were linear for 1.4–7.0 mg/l Cr, 1.3–6.5 mg/l Mo and 0.7–3.4 mg/l V. The relative standard deviations were between 6 and 10%. HPLC-Analyse von Cr, V und Mo unter Verwendung von Vorsäulen- in Kombination mit Säulenderivatisierung durch Oxin, Bipyridin und H₂O₂

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