Ascorbic acid and tannins from Emblica officinalis Gaertn. Fruits--a revisit.
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.
Majeed
Muhammed
M
Sami Labs Ltd, I Main, II Phase, Peenya Industrial Area, Bangalore, India.
Bhat
Beena
B
Jadhav
Atul N
AN
Srivastava
Jyotish S
JS
Nagabhushanam
Kalyanam
K
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*
D006027:Glycosides; D010936:Plant Extracts; D013634:Tannins; C467022:emblicanin A; C467023:emblicanin B; D001205:Ascorbic Acid