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Selective Voltammetric Determination of Tartrazine in the Presence of Red 10B by Nanogold‐modified Carbon Paste Electrode
Author(s) -
Ghoreishi Sayed Mehdi,
Behpour Mohsen,
Golestaneh Mahshid
Publication year - 2013
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201200143
Subject(s) - tartrazine , chemistry , chronoamperometry , detection limit , cyclic voltammetry , charge transfer coefficient , differential pulse voltammetry , electrode , carbon paste electrode , voltammetry , analytical chemistry (journal) , repeatability , electrochemistry , buffer solution , inorganic chemistry , nuclear chemistry , chromatography
A nanogold modified carbon paste electrode (NG‐CPE) was fabricated and used as selective voltammetric sensor for determination of Tartrazine in the presence of Red 10B using cyclic voltammetry (CV), differential pulse voltammetry (DPV), and chronoamperometry (CHA). Electrochemical parameters including the diffusion coefficient (D), the electron transfer coefficient (a), and the electron transfer number (n) were determined for the oxidation of Tartrazine. This modified electrode can be applied to simultaneous determination of Tartrazine and Red 10B, because of considerable decreases of anodic overpotentials for both compounds. After optimizing the experimental conditions, the anodic peak current of Tartrazine was linear to its concentration in the range of 0.05‐1.5 μmol l −1 , and the detection limit was 0.017 μmol l −1 in phosphate buffer solution (PBS) at pH 4.0. The modified electrode has good stability and repeatability. It was applied to the determination of Tartrazine and Red 10B in soft drinks with satisfactory results.