کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6405829 1330926 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimization of purification conditions of radish (Raphanus sativus L.) anthocyanin-rich extracts using chitosan
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Optimization of purification conditions of radish (Raphanus sativus L.) anthocyanin-rich extracts using chitosan
چکیده انگلیسی

This study developed a chitosan-treatment procedure to remove impurities from radish anthocyanin extracts to promote their utilization as natural food colorants. Effects of purification conditions (independent variables) including pH (3.7, 4.0, and 4.3), chitosan concentration (1.5, 2.0, and 2.5 g/100 mL), and treatment duration (2, 2.5, and 3 h) on anthocyanin content, glucosinolate content, and clarity of radish anthocyanin-rich extracts (dependent variables) were investigated via a Box-Behnken experimental design. A set of preferred chitosan treatment conditions was determined to be 2.74 h at pH 3.92 with an initial chitosan concentration of 1.59 g/100 mL, according to the desirability function analyses. Under these purification conditions, glucosinolate reduction was ∼61%, clarity was enhanced from 45.5% to 86.9%, and anthocyanin retention was ∼95%. This chitosan-treatment procedure uses a biodegradable agent, and is safe, economic and efficient for solving the off-flavor and clarification problems of radish anthocyanin extracts. The procedure requires no special equipment and has potential to be scaled up for commercial production.

► Glucosinolate hydrolyses cause off-flavor problems in radish anthocyanin extracts. ► Chitosan removes glucosinolates effectively to improve radish pigment quality. ► An optimized chitosan treatment is initial 1.59 g/100 mL at pH 3.92 for 2.74 h. ► The optimal treatment reduces 61% glucosinolates while 95% anthocyanin remaining.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: LWT - Food Science and Technology - Volume 44, Issue 10, December 2011, Pages 2097-2103
نویسندگان
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