Optimization of extraction methods for determination of the raffinose family oligosaccharides in leguminous vine peas (Pisum sativum L.) and effects of blanching
Author
Summary, in English
The extraction procedure for analysis of the raffinose family oligosaccharides (RFOs) in blanched leguminous vine peas was optimized. For this purpose, 25 pea samples from different cultivars and of different maturity were chosen at random. The effect of blanching was also studied in four cultivars. The yield of oligosaccharides was almost double on average when extracted with 50% ethanol as compared with 80% ethanol. This was generally valid for all three oligosaccharides, with some exceptions for verbascose, where 80% ethanol was shown to be as effective as 50% ethanol. Extraction at room temperature and at boiling temperature gave similar yields, while 15 min of extraction gave lower yields than 30 and 60 min of extraction, which were similar. The loss of oligosaccharides following blanching was 32% on average, with verbascose showing the highest loss (56.4%), followed by raffinose (28.4%) and stachyose (16.3%). It can be concluded that the procedure used for extraction is of great importance when analysing the RFOs in immature peas, and that there is considerable loss of these sugars during blanching, which is the process commonly used to prepare the frozen commercial product. (c) 2006 Elsevier Inc. All rights reserved.
Department/s
Publishing year
2007
Language
English
Pages
13-18
Publication/Series
Journal of Food Composition and Analysis
Volume
20
Issue
1
Document type
Journal article
Publisher
Elsevier
Topic
- Nutrition and Dietetics
Keywords
- oligosaccharides
- raffinose
- blanched leguminous vine pea
- sativum L.
- Pisun
- English pea
- green pea
Status
Published
ISBN/ISSN/Other
- ISSN: 0889-1575