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GB/T 24899-2010: Inspection of grain and oils -- Determination of crude protein in wheat -- Near-infrared method
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 24899-2010 | English | 189 |
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Inspection of grain and oils -- Determination of crude protein in wheat -- Near-infrared method
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GB/T 24899-2010
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Basic data | Standard ID | GB/T 24899-2010 (GB/T24899-2010) | | Description (Translated English) | Inspection of grain and oils -- Determination of crude protein in wheat -- Near-infrared method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.060 | | Word Count Estimation | 8,813 | | 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 the determination of wheat near- infrared analysis of 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 wheat crude protein content (dry basis) for rapid determination. This standard does not apply to arbitration test. | GB/T 24899-2010: Inspection of grain and oils -- Determination of crude protein in wheat -- Near-infrared method
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Inspection of grain and oils. Determination of crude protein in wheat. Near-infrared method
ICS 67.060
B20
National Standards of People's Republic of China
Inspection of grain
Determination of crude protein content of wheat 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 is a standard method for rapid determination of crude protein content of wheat (dry basis) is built on the basis of classical methods 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, the State Grain Reserve Wuxi Scientific Research and Design Institute,
Yunnan Province, grain and oil products Quality Supervision and Testing Center, Beijing foodstuff Control, grain and oil quality inspection center in Inner Mongolia, Guangxi grain and oil quality
Supervision, Inspection Station, Perten Instruments, FOSS Analytical.
The main drafters of this standard. Zhu light, Wu Chun-rong, Chen Zhihua, Xue Bing, Wang Caiqin, Dong Qi, Liu Yongying, Liu Yufei, Zhao Wushan.
Inspection of grain
Determination of crude protein content of wheat Near Infrared Spectroscopy
1 Scope
This standard specifies the method for the determination of wheat 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 wheat 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
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 the correlation between wheat near-infrared spectroscopy and its crude protein content between the calculation of crude protein wheat samples
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 (applicable to the determination of powdered samples NIR analyzer). Preparation of samples for whole wheat flour, crushed samples of grain
Distribution and uniformity should be consistent with the requirements established NIR analyzer calibration model when. When modeling and calibration and verification should be used when using
The same preparation procedure.
6 Determination
6.1 preparation before the test
6.1.1 Sample collection and decimation executed according to the provisions of GB 5491.
6.1.2 Sample finishing, to remove impurities in the sample.
6.1.3 according to the near-infrared analyzer (5.1) specification requirements for instrument self-test and warm-up test.
6.1.4 In use, at least a day to monitor samples with NIR analyzer to monitor once, the same sample of crude protein content monitoring
The measurement results compared with the initial measurement result, shall ensure that when the crude protein content of 15% or less, the absolute difference between the two is not more than 0.2%
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