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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Status: Obsolete GB/T 5517: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 5517-2010 | English | 239 |
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Inspection of grain and oils -- Determination of acidity in grain and produce
| Obsolete |
GB/T 5517-2010
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| GB/T 5517-1985 | English | 199 |
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2 days [Need to translate]
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Inspection of grain and oilseeds--Methods for determination of acidity of grain
| Obsolete |
GB/T 5517-1985
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PDF similar to GB/T 5517-2010
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Count Estimation | 6,667 | | Date of Issue | 2010-09-26 | | Date of Implementation | 2011-03-01 | | Older Standard (superseded by this standard) | GB/T 5517-1985 | | Quoted Standard | GB/T 601; GB/T 5490; GB 5491 | | Regulation (derived from) | National Standard Approval Announcement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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