Journal
FOOD CHEMISTRY
Volume 173, Issue -, Pages 449-453Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2014.10.050
Keywords
Quinoline yellow; Electrochemical determination; Polyvinylpyrrolidone (PVP); Food analysis
Funding
- National Natural Science Foundation of China [21361009, 21363007, 21175033]
- Natural Science Foundation of Hubei Province [2009CDB024]
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A novel electrochemical sensor using polyvinylpyrrolidone (PVP)-modified carbon paste electrode was developed for the sensitive and rapid determination of quinoline yellow. In 0.1 M, pH 6.5 phosphate buffer, an irreversible oxidation wave at 0.97 V was observed for quinoline yellow. PVP exhibited strong accumulation ability to quinoline yellow, and consequently increased the oxidation peak current of quinoline yellow remarkably. The effects of pH value, amount of PVP, accumulation potential and time were studied on the oxidation signals of quinoline yellow. The linear range was from 5 x 10(-8) to 1 x 10(-6) M, and the limit of detection was evaluated to be 2.7 x 10(-8) M. It was used to detect quinoline yellow in different drink samples, and the results consisted with the values that obtained by high-performance liquid chromatography. (C) 2014 Elsevier Ltd. All rights reserved.
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