کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1165481 1491100 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemistry of ascorbic acid and sulfur dioxide as an antioxidant system relevant to white wine
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Chemistry of ascorbic acid and sulfur dioxide as an antioxidant system relevant to white wine
چکیده انگلیسی

The impact of the combined ascorbic acid and sulfur dioxide antioxidants on white wine oxidation processes was investigated using a range of analytical techniques, including flow injection analysis for free and total sulfur dioxide and two chromatographic methods for ascorbic acid, its oxidative degradation products and phenolic compounds. The combination of different analytical techniques provided a fast and simultaneous means for the monitoring of oxidation processes in a model wine system. In addition, the initial mole ratio of sulfur dioxide to ascorbic acid was varied and the model wine complexity was increased by the inclusion of metal ions (copper(II) and iron(II)). Sulfur dioxide was found not to be a significant binder of ascorbic acid oxidative degradation products and could not prevent the formation of certain phenolic pigment precursors. The results provide a detailed insight into the ascorbic acid/sulfur dioxide antioxidant system in wine conditions.

Figure optionsDownload as PowerPoint slideHighlights
► Use of flow injection analysis and liquid chromatography for the monitoring of oxidative processes relevant to white wine.
► A range of sulfur dioxide to ascorbic acid initial mole ratios was used to evaluate the combined effects of the antioxidant system.
► The ascorbic acid degradation products were found to be weak binders of sulfur dioxide under wine conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volume 732, 30 June 2012, Pages 186–193
نویسندگان
, , ,