FOOD GRADE ARABINOXYLAN PRODUCT FROM CORN FIBER

摘要

A food grade water-soluble arabinoxylan product containing arabinoxylan oligosaccharides and retaining a high amount of bound ferulic acid and other phenolic substances is isolated from corn fiber using an aqueous extraction wherein the pH of the aqueous medium employed for the extraction is adjusted to a selected value after mixing with the corn fiber and prior to the initiation of extraction.

主权项

1. A method of isolating a food grade arabinoxylan product from corn fiber, wherein the method comprises in sequential order the steps of a) mixing a corn fiber with an aqueous medium to form an aqueous mixture of corn fiber, b) measuring the pH of the aqueous mixture of corn fiber, c) determining whether the measured pH of the aqueous mixture of corn fiber corresponds to a preselected initial pH value, d) if the measured pH does not correspond to the preselected initial pH value, adding an amount of acid or base to the aqueous mixture of corn fiber effective to bring the measured pH into correspondence with the preselected initial pH value, e) heating the aqueous mixture of corn fiber for a time and at a temperature effective to extract arabinoxylan oligosaccharide into the aqueous medium from the corn fiber such that at least 50% of the ferulic acid extracted into the aqueous medium is covalently bonded to the arabinoxylan oligosaccharide, and f) separating the aqueous medium containing extracted arabinoxylan oligosaccharide from the corn fiber.