کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1185934 963420 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of citric acid on the phenolic contents of olive oil
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
The effect of citric acid on the phenolic contents of olive oil
چکیده انگلیسی

Response surface methodology was used to optimise the combined effects of malaxation time (t) and aqueous citric acid solution (CA) added at the beginning of the malaxation step on total polyphenols (TP) and o-diphenols (OD) content and the antiradical power (ARP) of the olive oil extracted from the Italian olive fruits of Coratina cultivar. Different tests were performed according to a 32 full factorial design, varying t from 30 to 90 min and the CA from 5 to 15 ml/kgpaste. Overall optimal conditions identified by a numerical optimisation for the three responses were found to be at t = 30 min and CA = 13.79 ml/kgpaste under which the model predicted TP = 604.52 μgCAE/goil, OD = 80.44 μgCAE/goil and ARP = 28.73 μgDPPH/μlextract. There were also linear correlations between TP (R2 = 0.8176) and OD (R2 = 0.8633) values of olive oil and waste water. The results of this study demonstrate that considerably short malaxation time and relatively small amounts of citric acid were required to enhance the quality of olive oil. The outcome of our study will therefore be of great value for the commercial production of olive oil with high level of polyphenols and o-diphenols.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 116, Issue 3, 1 October 2009, Pages 617–623
نویسندگان
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