GB/T 5517-2010 English PDF

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GB/T 5517-2010: Inspection of grain and oils -- Determination of acidity in grain and produce
Status: Obsolete

GB/T 5517: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 5517-2010	239	Add to Cart	3 days	Inspection of grain and oils -- Determination of acidity in grain and produce	Obsolete
GB/T 5517-1985	199	Add to Cart	2 days	Inspection of grain and oilseeds--Methods for determination of acidity of grain	Obsolete

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GB/T 5493   GB/T 5526   GB 5491   GB/T 5518   GB/T 5509   

Basic data

Standard ID: GB/T 5517-2010 (GB/T5517-2010)
Description (Translated English): Inspection of grain and oils -- Determination of acidity in grain and produce
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: X10
Classification of International Standard: 67.040
Word Count Estimation: 6,667
Date of Issue: 2010-09-26
Date of Implementation: 2011-03-01
Older Standard (superseded by this standard): GB/T 5517-1985
Quoted Standard: GB/T 601; GB/T 5490; GB 5491
Regulation (derived from): National Standard Approval Announcement 2010 No.6 (Total No.161)
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary: This standard specifies the determination of acidity of food and products terminology and definitions, principle, reagents and materials, instruments and appliances, for sampling, operating procedures and the results of the calculation and presentation requirements. This standard applies to the determination of the acidity of the food and its products.

GB/T 5517-2010: Inspection of grain and oils -- Determination of acidity in grain and produce

---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 acidity in grain and produce ICS 67.040 X10 National Standards of People's Republic of China Replace GB/T 5517-1985 Grain and oil inspection - Determination of acidity of food and products 2010-09-26 release 2011-03-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China China National Standardization Management Committee released

Foreword

This standard is GB/T 5517-1985 "food, oil inspection grain acidity determination" revision. The main differences between this standard and GB/T 5517-1985 are as follows. --- "preface", "normative reference document", "terms and definitions", "principle", " --- refinement of the sample preparation requirements and sample oscillation extraction method; Specified repeatability requirements. This standard is proposed by the National Grain Bureau. This standard by the National Grain Standardization Technical Committee. The main drafting of this standard unit. Nanjing University of Finance and Economics, Jiangsu Province Product Quality Supervision and Inspection Research Institute. The main drafters of this standard. Yang Huiping, Yuan Jian, Zhang Zheng, Cai Jing, Yang Xiaorong. This standard replaced the previous version of the standard release. --- GB/T 5517-1985. Grain and oil inspection - Determination of acidity of food and products

1 Scope

This standard specifies the terms and definitions, principles, reagents and materials, instruments and utensils for the determination of acidity and hygienic products. And the calculation and presentation of the results. This standard applies to the determination of acidity of food and its products.

2 normative reference documents

The terms of the following documents are hereby incorporated by reference into this standard. Whichever is the date of the reference file, which is followed by all (Excluding corrigenda) or revisions do not apply to this standard, however, encourage the parties to reach an agreement under this standard Whether you can use the latest version of these files. For undated references, the latest edition applies to this standard. Preparation of standard titration solution for GB/T 601 chemical reagents General rules for grain and oil inspection GB/T 5490 GB 5491 grain, oilseed inspection, sampling method

3 terms and definitions

The following terms and definitions apply to this standard. 3.1 Acidity acidity Food and its products containing phosphoric acid, acid phosphate, lactic acid, acetic acid and other water-soluble acidic substances in the total. To 10g samples of the consumer Consumption of 0.1mol/L potassium hydroxide or sodium hydroxide standard solution in milliliters.

4 principle

Water-soluble acidic substances (such as phosphoric acid and its acidic salts, lactic acid, acetic acid, etc.) in the sample were extracted with water at room temperature, and potassium hydroxide or hydrogen Sodium standard solution titration, calculate the acidity.

5 reagents and materials

The reagents listed in this standard are of analytical grade and water is distilled water. 5.1 potassium hydroxide or sodium hydroxide standard solution c (KOH or NaOH) = 0.01mol/L. according to GB/T 601 implementation. 5.2 Trichloromethane. 5.3 phenolphthalein indicator. 10g/L 95% ethanol solution. 5.4 Distilled water without carbon dioxide. boil water for 15 min, expel carbon dioxide, cool, close.

6 instruments and appliances

6.1 Crusher. can make the crushed sample more than 95% through the CQ16 sieve (equivalent to 40 mesh), crushing the sample when the chamber should not heat. 6.2 with a stopper flask. 250mL. 6.3 Oscillator. reciprocating, oscillation frequency of 100 times/min. 6.4 in the speed of qualitative filter paper. ......

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