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Mccleary BV, Mugford DC, Camire MC, Gibson TS, Harrigan K, Janning M, Meuser F, Williams P. Determination of ß-Glucan in Barley and Oats by Streamlined Enzymatic Method: Summary of Collaborative Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/80.3.580] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Abstract
A collaborative study was conducted involving 8 laboratories (including the authors’ laboratories) to validate the streamlined enzymatic method for determination of ß-D-glucan in barley and oats. In the method, the flour sample is cooked to hydrate and gelatinize ß-glucan, which is subsequently hydrolyzed to soluble fragments with the lichenase enzyme. After volume and pH adjustments and filtration, the solution is treated with ß-glucosidase, which hydrolyzes ß-gluco-oligosaccharides to D-glucose. D-Glucose is measured with glucose oxidase-peroxidase reagent. Other portions of lichenase hydrolysate are treated directly with glucose oxidase-peroxidase reagent to measure free glucose in test sample. If levels of free glucose are high, the sample is extracted first with 80% ethanol. For all samples analyzed, the repeatability relative standard deviation (RSDr) values ranged from 3.1 to 12.3% and the reproducibility relative standard deviation (RSDR) values ranged from 6.6 to 12.3%. The streamlined enzymatic method for determination of ß-D-glucan in barley and oats has been adopted first action by AOAC INTERNATIONAL.
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Affiliation(s)
- Barry V Mccleary
- Megazyme International Ireland Ltd., Bray Business Park, Bray, County Wicklow, Ireland
| | - David C Mugford
- Bread Research Institute of Australia, Inc., PO Box 7, North Ryde, New South Wales, 2113, Australia
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