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- Title
Electrochemical Study of Auramine O at Glassy Carbon Electrode and Its Determination in Food by Differential Pulse Adsorptive Stripping Voltammetry.
- Authors
Thi Kim Thuong Nguyen; Thi Huong Giang Le; Van Thang Duong; Tuan Anh Pham
- Abstract
A simple, nontoxic, rapid and sensitive method to determine of auramine O in food using glassy carbon electrode was investigated. The cyclic, differential pulse adsorptive stripping voltammetry methods was used to study the electrochemical behavior of auramine O on the glassy carbon electrode in Britton-Robinson buffer. The oxidation peak of the auramine O was irreversible, adsorptive on the surface electrode. Using differential pulse adsorptive stripping voltammetry to determine auramine O with optimal conditions were Britton - Robinson buffer pH 10, adsorption potential 0 V, adsorption time 90 s, pulse amplitude 50 mV, scan rate 25 mV s-1. This process could be used to determination auramine O concentration in the range from 1.0x10-8 mol L-1 to 20.0x10-8 mol L-1 with a detection limit of 2.7x10-9 mol L-1, quantitation limit 9.0x10-9 mol L-1. We successfully applied the procedure to determine auramine O in spiked chicken meat with mean recovery 90.2±2.1%. The detection limit and the limit of quantification of the auramine O in spiked chicken meat was found to be 0.16 µg g-1 and 0.53 µg g-1, respectively.
- Subjects
CARBON electrodes; VOLTAMMETRY; OXIDATION; DETECTION limit; CHEMICAL structure; SPECTROPHOTOMETRY; LIQUID chromatography-mass spectrometry
- Publication
Analytical & Bioanalytical Electrochemistry, 2019, Vol 11, Issue 4, p510
- ISSN
2008-4226
- Publication type
Article