کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10560037 | 969700 | 2011 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Potentiometric detection of citrate in beverages using a graphite carbon electrode
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
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چکیده انگلیسی
The development, evaluation and application of a simple and low-cost graphite carbon electrode for the direct determination of citrate in food samples are described here. The electrode exhibits a linear response with a slope of â29.0 ± 1.0 mV decadeâ1 in a concentration range of 0.07-7.0 mmol Lâ1 in 0.1 mol Lâ1 KCl/1.0 mmol Lâ1 phosphate buffer solution with a limit of detection of 3.0 μmol Lâ1. The electrode is easily constructed at a relatively low cost and has a fast time response (within 120 s) with no significant changes in its performance characteristics. The performance of the graphite sensor was tested to determine citrate in beverage samples (juices and an isotonic drink), and the results were validated against a reference procedure. The proposed method is quick, inexpensive, selective and sensitive, and is based entirely on conventional instrumentation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 84, Issue 4, 30 May 2011, Pages 1169-1173
Journal: Talanta - Volume 84, Issue 4, 30 May 2011, Pages 1169-1173
نویسندگان
Celso L. Araújo, Edmar I. Melo, NÃvia M.M. Coelho,