Open AccessFast Determination of Auramine O in Food by Adsorptive Stripping Voltammetry
Author(s) -
Thuong Nguyen Thi Kim,
Thi Thu Phuong Bui,
Anh Tuấn Thanh Phạm,
Van Thang Duong,
Trаng Lе
Publication year - 2019
Publication title -
journal of analytical methods in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.407
H-Index - 25
eISSN - 2090-8865
pISSN - 2090-8873
DOI - 10.1155/2019/8639528
Subject(s) - hanging mercury drop electrode , detection limit , chemistry , analytical chemistry (journal) , adsorptive stripping voltammetry , square wave , voltammetry , analyte , electrochemistry , mercury (programming language) , electrode , cyclic voltammetry , drop (telecommunication) , chromatography , telecommunications , physics , voltage , quantum mechanics , computer science , programming language
The electrochemical behaviour of auramine O on the hanging mercury drop electrode has been investigated by cyclic and square wave voltammetry method. Reduction peak of auramine O was irreversible and adsorptive on the hanging mercury drop electrode. The optimal conditions were chosen to be Briton–Robinson buffer pH 9.0, accumulation potential −0.5 V vs. Ag/AgCl/KCl, accumulation time 60 s, pulse amplitude 250 mV·s −1 , and frequency 50 Hz. At the optimum experimental conditions, the peak of the target analyte was sharp and asymmetric. The linearity of the peak current depending on the concentration ranged from 4.0 × 10 −8 to 6.4 × 10 −7 mol L −1 . The limit of detection and limit of quantitation were 2.46 × 10 −8 mol L −1 and 8.21 × 10 −8 mol L −1 , respectively. The recovery and relative standard deviation were 94.9% and 2.0% ( n = 5). The developed method was successfully applied to determine auramine O in chicken samples with an appropriate sample preparation.