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1、 Scope This standard specifies the method for determining dietary fiber in food (enzymatic gravimetric method) This standard is applicable to the determination of total, soluble, and insoluble dietary fiber in all plant-based foods and their products, but does not include dietary fiber components such as oligofructose, galactooligosaccharides, polydextrose, resistant maltodextrin, and resistant starch Secondly, terms and definitions 2.1 Dietary fiber (DF) Carbohydrate polymers that cannot be digested and absorbed by the human small intestine but have health significance, naturally present in plants or extracted/synthesized, with a degree of polymerization DP ≥ 3. Including cellulose, hemicellulose, pectin, and other monomer components 2.2 Soluble Dietary Fiber (SDF) The portion of dietary fiber that is soluble in water, including oligosaccharides and some indigestible polysaccharides 2.3 Insoluble Dietary Fiber (DF) The portion of dietary fiber that is insoluble in water, including lignin, cellulose, and some hemicellulose 2.4 Total Dietary Fiber (TDF) The sum of soluble and insoluble dietary fibers. Thirdly, Principles The dried sample is thermally stable α- After enzymatic digestion with amylase, protease, and glucosidase to remove protein and starch, the residue is precipitated with ethanol, filtered, washed with ethanol and acetone, dried and weighed to obtain the total dietary fiber residue. Take another sample for enzymatic hydrolysis, directly filter and wash with hot water, dry and weigh the residue to obtain insoluble dietary fiber residue; The filtrate was precipitated with 4 times the volume of ethanol, filtered, and dried to obtain soluble dietary fiber residue. By deducting the corresponding protein, ash, and reagent blank content in various dietary fiber residues, the total, insoluble, and soluble dietary fiber content in the sample can be calculated Function of testing report:1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report 2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems100% inspection and testing process:1. Telephone communication and confirmation of requirements 2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:1. The testing industry is fully covered, meeting different testing needs 2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate 4. Free initial testing, with no testing fees charged 5. Self service order delivery for free on-site sampling 6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China
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