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GB/T 31743-2015 English PDF

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GB/T 31743-2015: Animal and vegetable fats and oils -- Determination of solid fat content by pulsed NMR -- Direct method
Status: Valid
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GB/T 31743-2015English569 Add to Cart 5 days [Need to translate] Animal and vegetable fats and oils -- Determination of solid fat content by pulsed NMR -- Direct method Valid GB/T 31743-2015

PDF similar to GB/T 31743-2015


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Basic data

Standard ID GB/T 31743-2015 (GB/T31743-2015)
Description (Translated English) Animal and vegetable fats and oils -- Determination of solid fat content by pulsed NMR -- Direct method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard X14
Classification of International Standard 67.200.10
Word Count Estimation 27,272
Date of Issue 2015-07-03
Date of Implementation 2015-11-02
Regulation (derived from) National Standard Announcement 2015 No.22
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

GB/T 31743-2015: Animal and vegetable fats and oils -- Determination of solid fat content by pulsed NMR -- Direct method


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Animal and vegetable fats and oils - Determination of solid fat content by pulsed NMR - Direct method ICS 67.200.10 X14 National Standards of People's Republic of China Determination of animal fats pulse NMR method Solid Fat Content Direct Method (ISO 8292-1.2008, Animalandvegetablefatsandoils-Determination ofsolidfatcontentbypulsedNMR-Part 1. Directmethod, IDT) Issued on. 2015-07-03 2015-11-02 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. This standard is identical with ISO 8292-1.2008 "Animal and vegetable fats pulsed NMR determination of solid fat content - Part 1. Direct method "(in English). Correspondence between the consistency of the standards of international documents and normative references of the following documents. --- GB/T 15687-2008 animal and plant oils prepared sample (ISO 661.2003, IDT). The editorial changes made the following standards. --- The "this International Standard" by "this standard"; --- The "ISO 8292-1" to "this standard"; "." --- With a decimal point instead of a comma as the decimal point, ""; --- Delete 8292-1.2008 Information Overview of elements (including the cover, inside front cover, preface); --- Replace the original standard text Explanatory Note; --- The Chapter 7 of the ISO 5555 recommended replace GB/T 5524; --- In order to facilitate the application of paragraph 8.3 of the order have been adjusted. The standard proposed by the National Food Authority. This standard by the National Grain and Oil Standardization Technical Committee (SAC/TC270) centralized. This standard is drafted by. State Administration of Grain Science Institute. Involved in the drafting of this standard. National Bureau of Standards Food Quality Center, the benefits of Kerry Oils (Tianjin) Co., Ltd., Nanjing University of Finance and Economics. The main drafters of this standard. Rui Zhang, Xue Yalin, Cao Ying Jun, Hao Xicheng, Hung Tai Fang, Wang Wei, Yuan Jian. Determination of animal fats pulse NMR method Solid Fat Content Direct Method

1 Scope

This standard specifies the determination of the direct use of low-resolution pulsed NMR method animal fats (hereinafter referred to as oil) in solid fat content Methods. Two Types of Heat pretreatment methods specified in this standard, one for having no significant Polymorphism and have β 'tendency to crystallize fats, other One for a significant Polymorphism grease and similar tendency to crystallize β cocoa butter. Appendix C for special purposes Other heat pretreatment methods. NOTE. The Convenient direct method is specified in this standard, reproducible, but using an approximate calculation method, the indirect method is better and accurate. ISO 8292-2 specifies Indirect method.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. ISO 661 for preparing samples of animal fat (Animalandvegetablefatsandoils-Preparationoftestsam- ple) Determination of solid fat content - Part 2 ISO 8292-2 Animal and vegetable fats pulsed NMR method. indirect method (Animaland vegetablefatsandoils-DeterminationofsolidfatcontentbypulsedNMR-Part 2. Indirectmethod)

3 Terms and Definitions

The following terms and definitions apply to this document. 3.1 The solid fat content solidfatcontent At a predetermined temperature, solid-solid phase accounting for the number of protons - the percentage of the total number of protons and liquid phases, referred to SFC. Note. The method for determining the SFC value corresponds to the mass percentage of solid fat. Inability to obtain at each temperature grease the solid and liquid phases accurate group Into, so solid and liquid phases of different proton density is not calibrated. Disregarding any system errors, SFC value obtained by this method than the actual solid fat High quality fat percentage of about 0.5% to 1.0%. 3.2 Liquid fat content liquidfatcontent At a predetermined temperature, the quality of liquid oil total fat percentage. NOTE. Liquid fat content equivalent to 100-wSFC, wSFC solid fat content. 3.3 Tempering treatment tempering Grease sample at a predetermined temperature, the time constant processing conditions, to convert it into a stable crystalline form of the process. 3.4 Test temperature measurementtemperature When solid fat content measured sample temperature.

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