In the present study, soymilk samples were prepared from 15 soybean varieties by employing dry method-raw slurry filtration (D-BAF), dry method-cooked slurry filtration (D-BBF), wet method-raw slurry filtration (W-BAF), and wet method-cooked slurry filtration (W-BBF). Different varieties of soybean and processing techniques were found to impose a significant impact on total phenolics, total flavonoids, phenolic acids, isoflavones and antioxidant capacity of soymilk samples. Overall, the soymilk prepared by W-BAF exhibited a higher level of total phenolic content and antioxidant activity. The soymilk samples prepared by W-BBF presented higher values for total flavonoid content and ferric-reducing antioxidant power assay. The soymilk prepared by W-BBF presented higher subtotal values of phenolic acids. In comparison, the soymilk prepared by D-BAF exhibited high amount of total isoflavones followed by the soymilk processed by W-BAF. Overall, the wet method was found to be responsible for improved phenolic contents and antioxidant activity of soymilk sample.
Keywords: 2,3,4-Trihydroxybenzoic acid (PubChem CID: 11874); Caffeic acid (PubChem CID: 689043); Chlorogenic acid (PubChem CID: 1794427); Correlation; Gallic acid (PubChem CID: 24721416); Gentisic acid (PubChem CID: 3469); Isoflavones; Phenolic acids; Processing; Protocatechualdehyde (PubChem CID: 1183); Protocatechuic acid (PubChem CID: 8468); Soymilk; Syringic acid (PubChem CID: 10742); Total phenolics; Vanillic acid (PubChem CID: 8468); p-Hydroxybenzoic acid (PubChem CID: 135).
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