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GB/T 24871-2010: Inspection of grain and oils -- Crude protein determination in wheat flour -- Near-infrared method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 24871-2010 | English | 189 |
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Inspection of grain and oils -- Crude protein determination in wheat flour -- Near-infrared method
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GB/T 24871-2010
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Basic data | Standard ID | GB/T 24871-2010 (GB/T24871-2010) | | Description (Translated English) | Inspection of grain and oils -- Crude protein determination in wheat flour -- Near-infrared method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.060 | | Word Count Estimation | 8,815 | | Date of Issue | 2010-06-30 | | Date of Implementation | 2011-01-01 | | Quoted Standard | GB 5491; GB/T 5511; GB/T 24895 | | Adopted Standard | AACC 39-11-1999, MOD | | Regulation (derived from) | National Standard Approval Announcement 2010 No.2 (Total No.157) | | 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 method for determining the near-infrared crude protein content of wheat flour (dry basis) of the terms and definitions, principle, instrument, determination, result processing and presentation, required accuracy and precision and the side test reports, recognition and treatment of abnormal samples. This standard applies to wheat flour crude protein content (dry basis) for rapid determination. This standard does not apply to arbitration test. | GB/T 24871-2010: Inspection of grain and oils -- Crude protein determination in wheat flour -- Near-infrared method
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Inspection of grain and oils. Crude protein determination in wheat flour. Near-infrared method
ICS 67.060
B20
National Standards of People's Republic of China
Inspection of grain and wheat flour Determination of crude protein content
Near Infrared Spectroscopy
Issued on. 2010-06-30
2011-01-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts the American Association of Cereal Chemists Standard AACC39-11.1999 "wheat flour protein near infrared reflectance party
Law "(English Version) (AACC Method39-11.Near-infraredreflectancemethodforproteindeterminationin
wheatflour).
For ease of use, this standard made the following editorial changes.
--- In order to be consistent with our existing system phase-change the standard standard name;
--- According to GB/T 1.1-2000 "Standardization Guide Part 1. Structure and rules are written standard" and GB/T 20000.2-
2001. provisions "Standardization Guide Part 2 of the rules of international standards", and without compromising the standard of comparison
By changing the structure of the text, the AACCMethod39-11.1999 in Chapter 1, "purpose" section of this standard adjustment
4. "principle"; the AACCMethod39-11.1999 in Chapter 2, "instrument" Adjust this standard Chapter 5, "Instrument";
The AACCMethod39-11.1999 in Chapter 3, "step" Adjust this standard Chapter 6, "Determination," and adds phase
The corresponding secondary and tertiary entry number;
--- With GB/T 5511 instead AACCMethod39-11.1999 standard "Method46-12", because both employed
The measurement method is the same;
--- With GB/T 24895 "Inspection of grain NIR calibration model validation and network management and maintenance of common rules" instead of the original
Standard "AACCMethod39-10", because AACC Method39-10 standard defines a near-infrared instruments
Types of;
--- Cancel the original standard defined about the near-infrared "reflex Class";
--- Increased Chapter 1, "" and Chapter 2, "Normative references", Chapter 3, "Terms and Definitions", Chapter 7, "and the result of the processing table
Show ", Chapter 8," identify and address abnormal samples, "Chapter 9," accuracy and precision "and Chapter 10," Test Report ";
--- Cancel the provisions of 5.2 and 5.3 about grinding equipment and microcomputer;
--- Increasing the sample 6.1.1 concerning sampling and sample provision;
--- For ease of use and control the AACCMethod39-11.1999 standard related to AACC standard method involved as
Reference annexed to this standard after.
This is a standard method for rapid determination of crude protein content in wheat flour is built on the basis of classical methods for arbitration test shall be to the country
Conventional methods have been prescribed home standards, namely GB/T 5511 "Determination of cereals and legumes nitrogen content and calculation of crude protein content Kjeldahl"
Prevail.
Appendix A of this standard is a normative appendix.
The standard proposed by the National Food Authority.
This standard by the National Standardization Technical Committee OILS.
This standard was drafted. Henan University of Technology, Institute of Cereals, Oils and standardization, Beijing foodstuff Control, Liaoning Province, grain and oil quality inspection
The Yunnan Province, grain and oil products Quality Supervision, Inspection and Test Center.
The main drafters of this standard. Chen Jie, Wu Chun-rong, Wang Lidan, Qiao Lina, Shao Zhiling.
Inspection of grain and wheat flour Determination of crude protein content
Near Infrared Spectroscopy
1 Scope
This standard specifies the method for determining the near-infrared crude protein content of wheat flour (dry basis) of the terms and definitions, principles, instruments, measurement results at
Management and representation, recognition and processing requirements, accuracy and precision and test reports of abnormal samples.
This standard applies to wheat flour crude protein content (dry basis) of rapid determination.
This standard does not apply to arbitration inspection.
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 5491 grain and oilseeds testing for sampling, and sample method
GB/T 5511 Cereals and pulses - Determination of nitrogen content and calculation of crude protein content Kjeldahl method
GB/T 24895 Inspection of grain NIR calibration model validation and network management and maintenance of general rules
3 Terms and Definitions
Terms and definitions GB/T 24895 apply to this standard established.
Principle 4
The use of a protein molecule C H, N H, O H, C O bond and other pan-frequency vibration or rotation of the near-infrared light absorption
Characteristics, establish the correlation between wheat flour with near-infrared spectroscopy with a crude protein content between chemometrics methods to calculate the coarse wheat flour samples
Protein content.
5 Instruments
NIR analyzer. Add OILS NIR network equipment should comply with GB/T 24895 requirements. No added OILS near infrared
Analysis of network equipment, verify eligibility in accordance with GB/T 24895 in the provisions relating to the calibration model validation.
6 Determination
6.1 preparation before the test
6.1.1 Sampling and sample decimation executed according to the provisions of GB 5491.
6.1.2 according to the near-infrared analyzer (Chapter 5) specification requirements for instrument self-test and warm-up test.
6.1.3 In the case where the state of at least a day of near infrared analyzer (Chapter 5) monitor with a monitor samples. You should track and monitor the daily knot
As a result, the measurement results of the same sample monitoring compared with the initial measurement result, shall ensure compliance with the provisions of 9.2. Preparation of the samples in accordance with Appendix monitor
A provision of execution.
6.1.4 The monitoring results do not meet the requirements of 9.2, shall cease to be adjusted or repaired and reported to the network administrator or use the instrument manufacturer.
6.1.5 Test sample temperature should be controlled within a calibration model validation tests specified temperature range.
6.2 Determination of wheat flour samples
Press NIR analyzer (Chapter 5) specification requirements, take appropriate samples for testing, measurement data recording. Each sample shall be determined two
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