GB/T 22428.1-2008Starch hydrolysis products -- Determination of reducing power and dextrose equivalent (English PDF)

Foreword

This standard is identical with ISO 5377. 1981 "starch hydrolysis products Determination of reducing power and dextrose equivalent Lane - Eynon titration" (In English), because of the older version, to meet current needs, slightly adjusted structure, contents remain the same, only made editorial changes.

This standard replaces GB/T 12099-1989 "starch hydrolysis products and reducing power equivalent determination of glucose." this standard and GB/T 12099-1989 compared to major changes are as follows.

--- Standard name changed to "starch hydrolysis products Determination of reducing power and dextrose equivalent";

--- Improve the standard format, according to the International System of Units standardized units;

--- Added "10 test report";

--- Added Appendix A;

--- Increased by reference.

Appendix A of this standard is an informative annex.

This standard is proposed and managed by China General Chamber of Commerce.

This standard was drafted. Chinese Chamber of Commerce Business Standard centers, food, Jiangnan University, China Starch Industry Association modified starch Professional Committee, Suzhou peak of Fine Chemical Co., Ltd., Roquette (China) Co., Ltd. Fine Chemicals.

1 Scope

This standard specifies Ryan - Determination of reducing power Eynon (LaneandEynon) titration starch hydrolysis products and glucose equivalents method.

This standard applies to starch hydrolysis products.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 22427.8 starch and its derivatives sulfated ash determination (GB/T 22427.8-2008, ISO 5809. 1982, IDT) GB/T 22428.3 Determination of glucose Loss on drying (GB/T 22428.3-2008, ISO 1741. 1980, IDT) GB/T 22428.4 Determination of dry matter of glucose syrup (GB/T 22428.4-2008, ISO 1742. 1980, IDT) ISO 1743 Determination of dry matter of glucose syrup index method

3 Terms and Definitions

The following terms and definitions apply to this standard.

Reducing sugar content. With 100g of anhydrous D- glucose in the sample is expressed in grams.

Reducing ability starch hydrolysis products. 100g sample to dry anhydrous D- glucose numbers expressed in grams.

Principle 4

Methylene blue as indicator, with a known volume of Fehling reagent titration dextrose solution.

5 Reagents

Use analytical grade reagents and distilled water or equivalent purity.