Determination of Catecholamines by Catalytic Oxidation at 1:12 Molybdophosphate CME in Liquid Chromatography

Chem. J. Chinese Universities ›› 1993, Vol. 14 ›› Issue (7): 914.

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Determination of Catecholamines by Catalytic Oxidation at 1:12 Molybdophosphate CME in Liquid Chromatography

JIN Li-Tong, LIU Tong, ZHOU Man-Shui, FANG Yu-Zhi

Department of Chemistry, East China Normal University, Shanghai, 200062

Received:1992-08-22 Revised:1993-01-14 Online:1993-07-24 Published:1993-07-24

Abstract

Abstract: An electrode modified with 1:12 molybdophosphate (PMo₁₂ CME) was prepared.Its high electrocatalytic effect on the oxidation of catecholamines (noradrenaline(NE), adrenaline (E) and dopamine(DA)) was described, and the mechanism was discussed.LCECwith PMo₁₂ CMEwas used to separate and detect catecholamines.The linear range of detection is 8.0×10^-11-2.0×10^-8 mol for NEand DA, 4.0×10^-11-2.0×10^-8 mol for E.The detection limit is 4.0×10^-11 mol for NEand DA, 2.0×10^-11 mol for E.The relative standard deviation for seven parallel determination is 1.6% for NE, 2.1% for DAand 4.5% for E.The noradrenaline in rat brain was detected and the results are satisfactory.

Key words: 1:12 Molybdophosphate modified electrode, Liquid chromatography electrochemistry, Noradrenaline, Adrenaline, Dopamine

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JIN Li-Tong, LIU Tong, ZHOU Man-Shui, FANG Yu-Zhi . Determination of Catecholamines by Catalytic Oxidation at 1:12 Molybdophosphate CME in Liquid Chromatography[J]. Chem. J. Chinese Universities, 1993, 14(7): 914.

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Determination of Catecholamines by Catalytic Oxidation at 1:12 Molybdophosphate CME in Liquid Chromatography

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