Journal
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
Volume 89, Issue 4, Pages 233-244Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/03067310802688579
Keywords
Sudan I; polyvinylpyrrolidone; sodium dodecyl sulphate; acetylene black paste electrode; enhancement effect
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Funding
- National Nature Science Foundation of China [60571042, 30770549, 20805035, 90817103]
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A novel electrochemical method for the sensitive determination of trace Sudan I at a polyvinylpyrrolidone (PVP) modified acetylene black carbon paste electrode (PVP/CPE) based on the enhancement effect of sodium dodecyl sulphate (SDS) was reported. Compared with the poor response at a bare acetylene black paste electrode (CPE), a well-defined oxidation peak of Sudan I was observed at the PVP modified CPE. The oxidation peak current of Sudan I was further enhanced with the addition of SDS, which was attributed to the enhancement effect of SDS at PVP/CPE. Under optimal working conditions, the oxidation peak current of Sudan I was proportional to its concentration in the range of 2.0 x 10(-7)-8.0 x 10(-6) mol L-1, with a low detection limit of 1.0 x 10(-8) mol L-1. The proposed method was successfully applied to the detection of Sudan I in chilli products.
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