Journal
JOURNAL OF AOAC INTERNATIONAL
Volume 99, Issue 5, Pages 1287-1294Publisher
AOAC INT
DOI: 10.5740/jaoacint.16-0138
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Funding
- National Natural Science Foundation of China [21575130, 21275132]
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A simple and sensitive voltammetric sensor for Orange II was developed, based on a poly(sodium p-styrenesulfonate)-functionalized graphene-modified glassy carbon electrode. This voltammetric sensor showed strong accumulation ability and an excellent voltammetric response for Orange II. The electrochemical behavior of Orange II was systematically investigated in a pH 7.0 phosphate buffer solution. By linear sweep voltammetry, under optimum conditions, a good linear relationship was obtained between peak currents and Orange II concentrations in the wider range of 3x10(-8) to 5x10(-8) mol/L, with an LOD of 1 x 10(-8) mol/L. In addition, the proposed Orange II sensor was successfully applied to real food samples with satisfactory recovery.
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