کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10560970 969759 2005 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new approach for the sequential injection spectrophotometric determination of the total antioxidant activity
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A new approach for the sequential injection spectrophotometric determination of the total antioxidant activity
چکیده انگلیسی
The ABTS+ is generated by oxidation of ABTS with potassium persulfate and is reduced in presence of hydrogen-donating antioxidants converting into a colourless product. The applicability of the developed method was tested by measurement of the antioxidant activity of pure compounds as well as by analysing complex food and beverage samples. The antioxidant activity was presented as l(+) ascorbic acid equivalence. The values obtained by this methodology were not significantly different from the results obtained by the original spectrophotometric ABTS assay. For most of the studied antioxidants, antioxidant activity varied with pH and dilution. The proposed SIA system is suitable for screening direct or diluted total antioxidant activity of pure compounds or food samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Talanta - Volume 68, Issue 2, 15 December 2005, Pages 207-213
نویسندگان
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