GB/T 5513-2019 English PDF

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GB/T 5513-2019: Inspection of grain and oils - Determination of reduced sugar and non-reduced sugar in grain
Status: Valid

GB/T 5513: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 5513-2019	279	Add to Cart	3 days	Inspection of grain and oils - Determination of reduced sugar and non-reduced sugar in grain	Valid
GB/T 5513-2008	559	Add to Cart	3 days	Inspection of grain and oils -- Determination of reduced sugar and non-reduced sugar in grain	Obsolete
GB/T 5513-1985	399	Add to Cart	3 days	Inspection of grain and oilseeds--Methods for determination of reduced sugar and non-reduced sugar	Obsolete

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Basic data

Standard ID: GB/T 5513-2019 (GB/T5513-2019)
Description (Translated English): Inspection of grain and oils - Determination of reduced sugar and non-reduced sugar in grain
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X04
Classification of International Standard: 67.040
Word Count Estimation: 14,112
Date of Issue: 2019-05-10
Date of Implementation: 2019-12-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 5513-2019: Inspection of grain and oils - Determination of reduced sugar and non-reduced sugar in grain

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Inspection of grain and oils--Determination of reduced sugar and non-reduced sugar in grain ICS 67.040 X04 National Standards of People's Republic of China Replace GB/T 5513-2008 Determination of reducing and non-reducing sugars in grain by grain and oil Published on.2019-05-10 2019-12-01 implementation State market supervision and administration China National Standardization Administration issued

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 5513-2008 "Measurement of reducing sugars and non-reducing sugars in grain and oil." The main technical changes of this standard compared with GB/T 5513-2008 are as follows. --- Added normative reference document GB/T 5490 (see Chapter 2); --- Increased the specifications of the Feilin reagent method (see 5.3.5); --- Modified the volume of the volume of the Ferien reagent method (see 5.3.1, 12.9 of the.2008 version); --- Revised the sample quality of the Feilin reagent method (see 5.4.2, 13.2 of the.2008 edition); --- Modified the Feilin reagent method for non-reducing sugar calculation formula (see 5.5.2,.2008 edition of 14.2). This standard was proposed by the National Grain and Material Reserve Bureau. This standard is under the jurisdiction of the National Grain and Oil Standardization Technical Committee (SAC/TC270). This standard was drafted. China Grain Storage Chengdu Storage Research Institute Co., Ltd. The main drafters of this standard. Jiang Tao, Yang Chao, Chen Jinying, Fu Aihua, Feng Yongjian. The previous versions of the standards replaced by this standard are. ---GB/T 5513-1985, GB/T 5513-2008. Determination of reducing and non-reducing sugars in grain by grain and oil

1 Scope

This standard specifies the terms and definitions for the determination of reducing sugars and non-reducing sugars in food, as well as the methods of potassium ferricyanide and Ferien reagents. The principles, reagents, instruments and utensils, procedure, calculation of results and repeatability of reducing sugars and non-reducing sugars were determined. This standard is applicable to the determination of reducing sugar and non-reducing sugar content in commercial grain. The potassium ferricyanide method is mainly suitable for wheat flour reduction. Determination of sugars and non-reducing sugars.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. Preparation of GB/T 601 chemical reagent standard titration solution GB/T 5490 General rules for grain and oil inspection GB/T 6682 Analytical laboratory water specifications and test methods

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Reducing sugar reducedsugar A sugar having a free hemiacetal hydroxyl group or a hemi-ketal hydroxyl group in its molecular structure. 3.2 Non-reducing sugar non-reducedsugar A sugar which does not contain a free hemiacetal hydroxyl group or a hemi-ketal hydroxyl group in the molecular structure.

4 potassium ferricyanide method

4.1 Principle The reducing sugar reduces potassium ferricyanide to potassium ferrocyanide in an alkaline solution and is itself oxidized to the corresponding sugar acid. Excess potassium ferricyanide In the presence of acetic acid, iodine is precipitated by the action of potassium iodide, and the precipitated iodine is titrated with a sodium thiosulfate standard solution. By calculating redox sugar The amount of potassium ferricyanide used is checked to show the percentage of reducing sugar in the sample. 4.2 Reagents Unless otherwise stated, this standard uses only reagents that are confirmed to be analytically pure. 4.2.1 Water. Meet the requirements of Class III water in GB/T 6682. 4.2.2 95% ethanol. 4.2.3 Acetate buffer. Dissolve 3.0 mL of glacial acetic acid, 6.8 g of anhydrous sodium acetate and 4.5 mL of concentrated sulfuric acid, then dilute with water until Mix 1000 mL and mix. ......

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