Physicochemical properties of pectins from ambarella peels (Spondias cytherea) obtained using different extraction conditions |
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Authors: | BB Koubala LI Mbome G Kansci F Tchouanguep Mbiapo M-J Crepeau J-F Thibault M-C Ralet |
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Affiliation: | 1. University of Yaounde I, Department of Biochemistry, P.O. Box 812, Yaounde, Cameroon;2. Food and Nutrition Research Centre, IMPM/MINRESI, P.O. Box 6163, Yaounde, Cameroon;3. Department of Biochemistry, University of Dschang, Cameroon;4. INRA, Nantes Research Center, BP 71627, 44316 Nantes Cedex 3, France |
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Abstract: | Extraction and use of pectins from ambarella peels could add value to the waste products arising from processing of the fruit. Dried alcohol-insoluble residues (AIR) of ambarella peels were treated separately with HCl, deionised water and oxalic acid/ammonium oxalate solutions, and the resulting pectin extracts analysed for some biochemical and physicochemical parameters. The results show that pectin yield (9–30% dry AIR), uronic acid (557–727 mg/g dry weight), neutral sugars (125–158 mg/g), degree of methylation (50–58%) and acetylation (4–6%), molar mass (263,000–303,000 g/mol) and intrinsic viscosity (179–480 ml/g) varied significantly (p < 0.05) with the various extraction methods used. Extraction with oxalic acid/ammonium oxalate solution gave the highest pectin yield, with high molar mass and degree of methylation, making the extracts suitable for use as additives in the food industry. The results compared well to lime pectin extracted under the same conditions, indicating their commercial significance. |
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Keywords: | Ambarella peels Pectins Physicochemical properties Extraction conditions |
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