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Determination of Tannic Acid Using Silica Gel Modified Carbon Paste Electrode
Authors: Vu Dai Long | Ertek Bensu | Červenka Libor | Dilgin Yusuf
Year: 2013
Type of publication: článek v odborném periodiku
Name of source: International Journal of Electrochemical Science
Publisher name: Electrochemical Science Group
Place: Belgrade
Page from-to: 9278-9286
Titles:
Language Name Abstract Keywords
cze Stanovení taninu s využitím uhlíkové pastové elektrody modifikované silikagelem V této práci byla použita uhlíková pastová elektroa modifikovaný silikagelem ke stanovení taninu metodou anodické rozpouštěcí diferenční pulsní voltametrie (ADSPV). Byly optimalizovány podmínky analýzy (vliv pH, množství silikagelu, akumulační potenciál a čas), které mohou ovlivňovat velikost oxidačního proudu taninu. Kalibrační křivka taninu byla lineární v rozsahu 1 - 1000x10(-9) mol l(-1). Vypočtený limit detekce byl 0,3x10(-9) mol l(-1). Výsledky měření taninu s využitím Si-gel/CPE byly shodné s výsledky získané referenční spektroskopickou metodou.
eng Determination of Tannic Acid Using Silica Gel Modified Carbon Paste Electrode In this paper, silica gel modified carbon paste electrode (Si-gel/CPE) was used for the determination of tannic acid (TA) by anodic stripping differential pulse voltammetry (ASDPV). The influences of pH values, amount of silica gel, accumulation potential and time on the signal enhancement of TA were optimized, and a novel electrochemical method for the determination of TA was reported. The currents obtained from ASDPV measurements at optimum conditions were linearly correlated with the concentration of TA. Calibration curve was obtained for TA concentrations in the range of 1 - 1000x10(-9) mol l(-1). The limit of detection was found to be 0.3x10(-9) mol l(-1). The results from TA measurements by Si-gel/CPE were in good agreement with those obtained from the standard spectrophotometric method. tannic acid; silica gel; carbon paste electrode; anodic stripping differential pulse voltammetry

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