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GB/T 24901-2010: Inspection of grain and oils -- Determination of crude protein in maize -- Near-infrared method
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| GB/T 24901-2010 | English | 139 |
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Inspection of grain and oils -- Determination of crude protein in maize -- Near-infrared method
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GB/T 24901-2010
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Basic data | Standard ID | GB/T 24901-2010 (GB/T24901-2010) | | Description (Translated English) | Inspection of grain and oils -- Determination of crude protein in maize -- Near-infrared method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.060 | | Word Count Estimation | 6,683 | | Date of Issue | 2010-06-30 | | Date of Implementation | 2011-01-01 | | Quoted Standard | GB 5491; GB/T 5511; GB/T 24895 | | 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 analysis of maize crude protein content (dry basis) of the terms and definitions, principle, equipment, measurement, result processing and presentation, identify and deal with abnormal samples, accuracy and precision and test reports requirements. This standard applies to crude protein content of corn (dry basis) for rapid determination. This standard does not apply to arbitration test. | GB/T 24901-2010: Inspection of grain and oils -- Determination of crude protein in maize -- Near-infrared method
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Inspection of grain and oils.Determination of crude protein in maize.Near-infrared method
ICS 67.060
B20
National Standards of People's Republic of China
Inspection of grain and corn 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 standard is the crude protein content of corn (dry basis) based on the rapid determination method based on the classical method for arbitration test shall be
National standards have been prescribed a conventional method, namely GB/T 5511 "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. National Food Authority Standard Quality Center, Henan University of Technology, Hubei Province, grain and oil quality monitoring stations, Liaoning Province, grain and oil quality
The amount of test, inspection by the Beijing foodstuff.
The main drafters of this standard. Tang Ruiming, Chen Jie, Wu Chun-rong, Nishan Shan, Qiao Lina, Min country spring, Wang Lidan.
Inspection of grain and corn determination of crude protein content
Near Infrared Spectroscopy
1 Scope
This standard specifies the method for the determination of corn near infrared crude protein content (dry basis) of the terms and definitions, principles, equipment, measurement,
Results processing and presentation, and asked to confirm the process, accuracy and precision and test reports abnormal samples.
This standard applies to crude protein content of corn (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
Use of protein molecules in the C-H, N-H, O-H bond and other pan-frequency vibration or rotation of the near infrared light absorption characteristics, with
Chemometric methods to establish maize samples near infrared spectrum and its relationship between crude protein, crude protein sample calculation corn
content.
5 Equipment
5.1 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.
5.2 sample grinding equipment (for measuring powder samples NIR analyzer). particle size distribution and homogeneity of the crushed sample should be consistent with the past
Infrared analyzer calibration model established requirements when, should be used when using the same manufacturing process and model calibration and verification.
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 Sample finishing to remove impurities in the sample and broken kernels.
6.1.3 according to the near-infrared analyzer (5.1) specification requirements for instrument self-test.
6.1.4 In use, at least a day of near infrared analyzer (5.1) monitoring once with monitoring samples. Monitoring results should be tracked daily with
The measurement results of a monitoring sample comparison with the initial measurement result, shall ensure compliance with the provisions of 9.2. Monitor sample preparation in accordance with Appendix A of
Regulations.
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