Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7620676 | Journal of Food Composition and Analysis | 2015 | 7 Pages |
Abstract
Hydrophilic extracts from different parts including leaves, stalks, seeds, flowers and sprouts of 3 Amaranthus species (Amaranthus hypochondriacus, Amaranthus caudatus and Amaranthus cruentus) were characterized for their phytochemical profiles including the phenolics and betacyanins by UHPLC and LC-ESI-MS, and their antioxidant activities by FRAP and ORAC assays. The main betacyanins in Amaranthus samples were identified to be amaranthine and isoamaranthine. Eleven phenolic compounds (gallic acid, protocatechuic acid, chlorogenic acid, gentistic acid, 2,4-dihydroxybenzoic acid, ferulic acid, salicylic acid, rutin, ellagic acid, kaempferol-3-rutinoside and quercetin) were identified in the extracts of different parts of Amaranthus. The total phenolic content (TPC) ranged from 1.04 to 14.94 mg GAE/g DW; the total flavonoid content (TFC) ranged from 0.27 to 11.40 mg CAE/g DW; while the total betalain content (TBC) ranged from 0.07 to 20.93 mg/100 g DW. FRAP values ranged from 0.63 to 62.21 μmol AAE/g DW and ORAC ranged from 30.67 to 451.37 μmol TE/g DW. The leaves of Amaranthus showed the highest TPC, TFC, TBC, FRAP and ORAC values; while the seeds and stalks the lowest. There was a strong correlation between TPC, TBC, TFC and the antioxidant activity. The result suggests that all parts of the Amaranthus plant can be a good source of antioxidants.
Keywords
ORACLC–ESI–MSAmaranthus cruentusAmaranthus caudatusBetacyaninACRAAETPTZCAEGAETFCUHPLCTPITPCFRAPTBCACAAAPHLC–MSAmaranthusBioactive non-nutrientsFood analysisFood compositionoxygen radical absorption capacityAntioxidant activityPhenolicTotal phenolic contentascorbic acid equivalentGallic acid equivalenttrolox equivalentcatechin equivalentTotal flavonoid contentAmaranthus hypochondriacusferric reducing antioxidant powerUltra High Performance Liquid Chromatography
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Hongyan Li, Zeyuan Deng, Ronghua Liu, Honghui Zhu, Jamie Draves, Massimo Marcone, Yong Sun, Rong Tsao,