کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1218445 967604 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An improved fluorimetric HPLC method for quantifying tocopherols in Brassica rapa L. subsp. sylvestris after harvest
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
An improved fluorimetric HPLC method for quantifying tocopherols in Brassica rapa L. subsp. sylvestris after harvest
چکیده انگلیسی

This study describes a reliable method suitable for the quantitative determination of tocopherols with a fast, easy extraction procedure and a rapid, sensitive HPLC fluorescence detection, that results in a better signal-to-noise ratio and lowers the detection limit. The limit of detection of this assay is about 0.06 mg L−1 and the linearity is in a range of 0.06–2 mg L−1. The method has been tested on samples of Brassica rapa L. subsp. sylvestris after harvest as affected by various storage temperatures (4 °C, 9 °C and 20 °C). The fluorescent detection makes it possible to measure tocopherols in these plants even when their concentration is extremely low, as at harvest, without the interference of other metabolites. The increase of tocopherols was followed for 14 days after harvest, and in particular the metabolic profile of α-tocopherol was compared with that of ascorbate, dehydroascorbate and chlorophyll.


► A fast FLD-HPLC method for tocopherols detection is proposed.
► Three extraction procedures are compared.
► The linearity of this assay is in a range of 0.06–2 mg L−1.
► Tocopherols are detected at very low concentration at the harvest of Brassica rapa.
► After harvest tocopherols strongly increase while ascorbate and chlorophyll decrease.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Food Composition and Analysis - Volume 27, Issue 2, September 2012, Pages 145–150
نویسندگان
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