Electrochemical Oxidation and Sensitive Determination of Pyrogallol at Preanodized Screen‐Printed Carbon Electrodes |
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Authors: | Pi‐Shan Feng Sheng‐Ming Wang Wan‐Yu Su Shu‐Hua Cheng |
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Affiliation: | Department of Applied Chemistry, National Chi Nan University, Puli, Nantou Hsien, Taiwan 545, R.O.C. |
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Abstract: | In this study, we report a simple, low‐cost and rapid electrochemical sensor based on the anodically pretreated screen‐printed carbon electrodes (SPCE*) for the determination of pyrogallol in pH 7.0 buffer solutions. Cyclic voltammetric studies show that SPCE* lowers overpotentials and improve electrochemical behaviour of pyrogallol, compared to untreated SPCE. All experimental parameters were optimized to improve voltammetric responses; excellent analytical features were achieved by flow‐injection amperometric methods. A linear calibration plot was obtained for 10‐1000 μM pyrogallol with a slope of 0.0562 μA/μM. The detection limit (S/N = 3) was 0.33 μM. Interferences from some inorganic salts and organic compounds were studied. The assay was applied to the determination of pyrogallol in tap water and lake water, respectively. |
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Keywords: | Pyrogallol Screen‐Printed carbon electrodes Anodization pretreatment Flow‐Injection amperometry |
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