کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7597343 1492131 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous determination of the isomers of Ponceau 4R and Amaranth using an expanded graphite paste electrode
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Simultaneous determination of the isomers of Ponceau 4R and Amaranth using an expanded graphite paste electrode
چکیده انگلیسی
A sensitive and convenient electrochemical method was developed for the simultaneous determination of the isomers of Ponceau 4R and Amaranth by an expanded graphite paste electrode (EGPE). The EGPE was prepared by mixing EG with solid paraffin. Compared with flake graphite paste and carbon paste electrodes, the EGPE showed higher electrocatalytic activity towards the oxidization of Ponceau 4R and Amaranth. Under optimal experimental conditions, the EGPE exhibited wide linear responses to Ponceau 4R and Amaranth ranging from 6 × 10−8 to 4 × 10−6 mol/L and 8 × 10−8 to 4 × 10−6 mol/L, respectively, and the detection limits for Ponceau 4R and Amaranth were 2 and 36 nmol/L, respectively, at a signal-to-noise ratio of 3. The EGPE showed good reproducibility, stability and reusability. The proposed method was successfully applied in the detection of Ponceau 4R and Amaranth in grape juice samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 160, 1 October 2014, Pages 11-15
نویسندگان
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