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GB/T 31577-2015: Inspection of grain and oils -- Determination of damaged starch -- Amperometric method
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| GB/T 31577-2015 | English | 299 |
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Inspection of grain and oils -- Determination of damaged starch -- Amperometric method
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GB/T 31577-2015
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Basic data | Standard ID | GB/T 31577-2015 (GB/T31577-2015) | | Description (Translated English) | Inspection of grain and oils -- Determination of damaged starch -- Amperometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | X10 | | Classification of International Standard | 67.060 | | Word Count Estimation | 14,168 | | Date of Issue | 2015-05-15 | | Date of Implementation | 2015-11-23 | | Quoted Standard | GB 5491; GB/T 5497; GB/T 5511 | | Regulation (derived from) | National Standard Announcement 2015 No. 15 | | 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 use of the principle amperometric measuring wheat flour starch damage, instruments, apparatus, reagents, for sampling, process and operations, the results of the calculation, precision, and report the results. This Standard applies to the determination of wheat flour starch damage. | GB/T 31577-2015: Inspection of grain and oils -- Determination of damaged starch -- Amperometric method
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Inspection of grain and oils - Determination of damaged starch - Amperometric method
ICS 67.060
X10
National Standards of People's Republic of China
Inspection of grain
Wheat flour starch damage amperometric measuring method
Issued on. 2015-05-15
2015-11-23 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.
The standard proposed by the National Food Authority.
This standard by the National Grain and Oil Standardization Technical Committee (SAC/TC270) centralized.
This standard was drafted. National Food Administration Institute of Science, the National Bureau of Standards, Quality Food Center.
Drafters of this standard. Chen Yao, Sun Hui, Jiang Weili, Chang Liu, Cao Ying-jun.
Inspection of grain
Wheat flour starch damage amperometric measuring method
1 Scope
This standard specifies the use of the principle amperometric measuring wheat flour starch damage, instruments and equipment, reagents, for sampling, procedure, results count
Operators, precision, and report the results.
This standard applies to the determination of wheat flour damaged starch.
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.
GB 5491 grain and oilseeds testing for sampling, and sample method
GB/T 5497 grain and oilseeds - Determination of water test
GB/T 5511 Cereals and pulses - Determination of nitrogen content and calculation of crude protein content Kjeldahl method
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Damage starch damagedstarch
Mechanical damage generated during milling damaged starch granules.
Principle 4
Under certain conditions, the suspension of wheat flour starch damage more iodine absorption, the smaller current through suspension. By the electrochemical reaction
Ying, produce the measured quality of wheat flour is proportional to the iodine, and the amount of iodine absorbed by the sample, determine the amount of damage to the starch sample.
5 instruments and appliances
5.1 Injury starch tester 1) (see Appendix A). The instrument should be calibrated periodically, it has the following technical parameters.
1) This standard is based on the French company's SDmatic CHOPIN based formulation. This information is provided for the convenience of the user of this standard to use, without
It is recognized by the instrument. All meet the test requirements of the instrument can be used.
--- Stirring rod speed. (1200 ± 5) r/min;
--- Vibration motor speed. (8500 ± 2000) r/min;
--- Heater resistance. diameter 8mm, power 60W;
--- Measuring rod. diameter 6mm, 4 platinum electrodes;
--- NTC (negative temperature coefficient) thermistor sensor. 10kΩ, 0 ℃ ~ 80 ℃, 35 ℃ temperature control accuracy of 1%.
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