title: Ascorbic acid and tannins from Emblica officinalis Gaertn. Fruits--a revisit.
abstract: The fruits of Emblica officinalis Gaertn. (Euphorbiaceae), also known as amla in Ayurveda, are considered to be a rich source of ascorbic acid. However, the antioxidant activities exhibited by E. officinalis extract are superior to those of ascorbic acid itself. Low molecular hydrolyzable tannins emblicanins A and B have been suggested in the earlier literature to be the contributory antioxidant molecules in the extract. This work finds no evidence for the presence of emblicanins A and B in the extract. In addition, the high content of ascorbic acid is also questionable due to previous nonidentification of coeluting mucic acid gallates. This paper reports a new HPLC method to detect even trace amounts of ascorbic acid in E. officinalis fruit juice or extract.
authors.affiliation: Sami Labs Ltd, I Main, II Phase, Peenya Industrial Area, Bangalore, India.
authors.forename: Muhammed
authors.initials: M
authors.lastname: Majeed
authors.forename: Beena
authors.initials: B
authors.lastname: Bhat
authors.forename: Atul N
authors.initials: AN
authors.lastname: Jadhav
authors.forename: Jyotish S
authors.initials: JS
authors.lastname: Srivastava
authors.forename: Kalyanam
authors.initials: K
authors.lastname: Nagabhushanam
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D005638:Fruit / Q000737:chemistry*; D006027:Glycosides / Q000032:analysis; D029842:Phyllanthus emblica / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry; D013634:Tannins / Q000032:analysis*
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D013634:Tannins; C467022:emblicanin A; C467023:emblicanin B; D001205:Ascorbic Acid