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
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله

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 6Â ÃÂ 10â8 to 4Â ÃÂ 10â6Â mol/L and 8Â ÃÂ 10â8 to 4Â ÃÂ 10â6Â mol/L, respectively, and the detection limits for Ponceau 4R and Amaranth were 2 and 36Â 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
Journal: Food Chemistry - Volume 160, 1 October 2014, Pages 11-15
نویسندگان
Jing Zhang, Meiling Wang, Chao Shentu, Wenchang Wang, Zhidong Chen,