Simultaneous Determination of Ascorbic Acid and Uric Acid by Using a PVC/TTF‐TCNQ Composite Electrode as Detector in a FIA System |
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| Authors: | Manuel Cano Beatriz Palenzuela J?Luis Ávila Rafael Rodríguez‐Amaro |
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| Institution: | Departamento de Química Física y Termodinámica Aplicada, Universidad de Córdoba, Campus de Rabanales, Edificio C‐3, 14071?Córdoba, Spain |
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| Abstract: | A PVC/TTF‐TCNQ composite electrode has been employed as detector in a flow injection system. The proposed method allows the simultaneous detection of ascorbic acid (AA) and uric acid (UA) in mixtures by using a FIA system in a simple manner, without pre‐treatment or modified electrode. This method is based on the amperometric determination of (a) ascorbic acid at 0.15 V and (b) both analytes at 0.35 V, being the response linear in the range 1×10?2–4×10?4 M for both analytes with detection limits (S/N=3) of 1.2×10?4 M and 8.1×10?5 M for AA and UA, respectively. |
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| Keywords: | TTF‐TCNQ Composite electrode PVC Ascorbic acid Uric acid Flow injection |
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