Determination of Caffeine by Differential Pulse Voltammetry with Nafion Coating Carbon Fibre Electrode

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (11): 1380.

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Determination of Caffeine by Differential Pulse Voltammetry with Nafion Coating Carbon Fibre Electrode

SUN Chang-Qing¹, CAO Qian¹, XU Hong-Ding¹, GUO Li-Ping²

1. Department of Chemistry, Jilin University, Changchan, 130023;
2. Department of Chemistry, Northeast Normal University, Changchun

Received:1991-10-14 Revised:1992-04-25 Online:1992-11-24 Published:1992-11-24

Abstract

Abstract: A Nafion modified carbon fibre microelectrode was established.The response of caffeine at the Nafion coating microelectrode was evaluated by differential pulse voltammetry.The linear relationship between the peak height and the concentration of caffeine in the range of 2×10^-5～5×10^-4mol/Lis obtained.By means of cyclic voltammetry the kinetic behaviour of caffeine on the electrode was studied.This method was also applied to the direct determination of caffeine in drugs.

Key words: Carbon fibre electrode, Caffeine, Voltammetry

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SUN Chang-Qing, CAO Qian, XU Hong-Ding, GUO Li-Ping. Determination of Caffeine by Differential Pulse Voltammetry with Nafion Coating Carbon Fibre Electrode[J]. Chem. J. Chinese Universities, 1992, 13(11): 1380.

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Determination of Caffeine by Differential Pulse Voltammetry with Nafion Coating Carbon Fibre Electrode

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