GB/T 5519-2018_English: PDF (GB/T5519-2018)
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Cereals and pulses -- Determination of the mass of 1 000 grains
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GB/T 5519-2018
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Cereals and pulses -- Determination of the mass of 1000 grains
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| GB/T 5519-1988 | English | 199 |
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Cereals and oilseeds method for determination of the mass of 1000 grains
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| Standard ID | GB/T 5519-2018 (GB/T5519-2018) | | Description (Translated English) | Cereals and pulses -- Determination of the mass of 1 000 grains | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.060 | | Word Count Estimation | 10,112 | | Date of Issue | 2018-02-06 | | Date of Implementation | 2018-09-01 | | Drafting Organization | Henan University of Technology, Liaoning Province, grain and oil inspection and monitoring institutes, Qinghai Province, grain and oil testing and prevention Institute, Fujian Province, grain and oil quality monitoring, grain storage and trade in Henan Province Co., Ltd., Jiaozuo City Grain and Oil Quality and Safety Inspection Center, the State Grain Administration standard quality center | | Administrative Organization | National Grain and Oil Standardization Technical Committee (SAC/TC 270) | | Proposing organization | National Food Administration | | Issuing agency(ies) | People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration | | Standard ID | GB/T 5519-2008 (GB/T5519-2008) | | Description (Translated English) | Cereals and pulses. Determination of the mass of 1000 grains | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.040 | | Word Count Estimation | 5,530 | | Date of Issue | 2008-11-04 | | Date of Implementation | 2009-01-20 | | Older Standard (superseded by this standard) | GB/T 5519-1988 | | Quoted Standard | GB/T 5497; GB/T 21305 | | Adopted Standard | ISO 520-1977, MOD | | Drafting Organization | Henan University of Technology | | Administrative Organization | National Standardization Technical Committee Agri | | Regulation (derived from) | National Standard Approval Announcement 2008 No.18 (Total No.131) | | Proposing organization | National Food Authority | | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | | Summary | This standard specifies the determination of grain and oilseeds grain weight terms and definitions, principle, steps, , apparatus and appliances, and the test results, said the report. This standard applies to the determination of commodity grain and oilseed thousand grain quality. This standard does not apply to sowing seeds. | | Standard ID | GB/T 5519-1988 (GB/T5519-1988) | | Description (Translated English) | Cereals and oilseeds method for determination of the mass of 1000 grains | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | B20 | | Classification of International Standard | 67.04 | | Word Count Estimation | 2,273 | | Date of Issue | 1988/9/2 | | Date of Implementation | 1989/3/1 | | Older Standard (superseded by this standard) | GB 5519-1985 | | Adopted Standard | ISO 520-1977, NEQ | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 18, 2008 (No. 131 overall) | | Issuing agency(ies) | State Bureau of Technical Supervision |
GB/T 5519-2018
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 67.060
B 20
Replacing GB/T 5519-2008
Cereals and Pulses - Determination of the Mass of 1,000
Grains
(ISO 520:2010, MOD)
ISSUED ON: FEBRUARY 6, 2018
IMPLEMENTED ON: SEPTEMBER 1, 2018
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 5
4 Principle ... 5
5 Instruments and Appliances ... 6
6 Operating Procedures ... 6
7 Result Expression ... 6
8 Precision ... 7
9 Other Instructions on the Determination Process ... 9
Appendix A (informative) Interlaboratory Test Results ... 10
Bibliography ... 14
Cereals and Pulses - Determination of the Mass of 1,000
Grains
1 Scope
This Standard specifies the method for the determination of the mass of 1,000 grains of cereals
and pulses.
This Standard is applicable to all cereals and pulses.
This Standard does not apply to seeds for sowing.
2 Normative References
The following documents are indispensable to the application of this document. In terms of
references with a specified date, only versions with a specified date are applicable to this
document. In terms of references without a specified date, the latest version (including all the
modifications) is applicable to this document.
GB/T 10362 Inspection of Grain and Oils - Determination of Moisture Content of Maize (GB/T
10362-2008, ISO 6540:1980, MOD)
GB/T 21305 Cereals and Cereal Products - Determination of Moisture Content - Routine
Reference Method (GB/T 21305-2007, ISO 712:1998, IDT)
ISO 24557 Pulses - Determination of Moisture Content - Air-oven Method
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 mass of 1,000 grains as received
The mass of 1,000 specimen grains containing natural moisture.
3.2 mass of 1,000 grains on the dry basis
The mass of 1,000 specimen grains after deducting the moisture content.
4 Principle
Weigh and count the complete grains in the specimen, divide the mass of the complete grains
by the number of grains, and express the result as the mass of 1,000 grains.
5 Instruments and Appliances
5.1 Sample splitter (if necessary).
5.2 Grain counter: a photoelectric counter can be used. If there is no suitable counter, it can be
manually counted.
5.3 Balance: with a division value of 0.001 g.
6 Operating Procedures
6.1 Determination of Mass of 1,000 Grains as Received
Randomly take out about 500 specimen grains from the laboratory sample, pick out the
complete grains and weigh them (mt), accurate to 0.01 g; record the number of complete grains
(N).
Each sample shall be tested twice in parallel.
6.2 Determination of Mass of 1,000 Grains on the Dry Basis
After removing impurities in the specimen, for cereals, in accordance with the stipulations of
GB/T 21305 or GB/T 10362, determine the moisture content of the complete grains; for pulses,
in accordance with the stipulations of ISO 24557, determine the moisture content (ωH2O) of the
complete grains. Meanwhile, in accordance with 6.1, determine the mass of 1,000 grains.
7 Result Expression
7.1 The mass of 1,000 grains as received (m1) is obtained through Formula (1):
Where,
m1---the mass of 1,000 grains, expressed in (g);
mt---the mass of complete grains, expressed in (g);
N---the number of complete grains in the mass of mt.
7.2 The mass of 1,000 grains on the dry basis (m0) is obtained through Formula (2):
Where,
m0---the mass of 1,000 grains on the dry basis, expressed in (g);
m1---the mass of 1,000 grains as received, expressed in (g);
ωH2O---the moisture content of the sample, expressed in (%).
7.3 If the parallel determination results comply with the repeatability requirements (8.2), take
the arithmetic mean as the result; otherwise, re-sampling is required for determination. The
determination result of the mass of 1,000 grains is expressed in the unit of g. Significant digits
are retained as follows:
a) If the mass of 1,000 grains is less than 10 g, retain two digits after the decimal point;
b) If the mass of 1,000 grains is equal to or greater than 10g but does not exceed 100 g,
retain one digit after the decimal point;
c) If the mass of 1,000 grains is greater than 100 g, take an integer.
8 Precision
8.1 Interlaboratory Test
Details of the interlaboratory test precision of this Method are provided in Appendix A. For
other data ranges and test objects, these test data are for reference only.
8.2 Repeatability
The situation that the absolute difference between two independent test results obtained through
mutually independent tests conducted in the same laboratory, by the same operator using the
same equipment and the same test method, on the same test object in a short period of time is
greater than the repeatability limit r shall not exceed 5%.
The laboratory test results of wheat and barley whose mass of 1,000 grains on the dry basis is
between 29.8 g ~ 48.2 g are shown in Table A.1, Table A.2 and Figure A.1.
8.3 Reproducibility
The situation that the absolute difference between two independent test results obtained through
mutually independent tests conducted in different laboratories, by different operators using
different equipment and the same test method, on the same test object is greater than the
reproducibility limit R shall not exceed 5%.
......
GB/T 5519-2008
Cereals and pulses. Determination of the mass of 1000 grains
ICS 67.040
B20
National Standards of People's Republic of China
Replacing GB/T 5519-1988
Determination of cereals and legumes Weighty
(ISO 520. 1977, MOD)
Posted 2008-11-04
2009-01-20 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This revised standard adopts ISO 520. 1977 "Determination of cereals and pulses grain weight" (in English).
This standard and ISO 520. 1977 main technical differences are as follows.
--- To increase and expand the scope of application;
--- Simplified procedure;
--- Identical with ISO 712 with the GB/T 21305 instead of the international standard;
--- With GB/T 5497 "grain, oilseeds test determination of moisture content" to define the primary international standards relating to the determination of moisture content of beans
Claim.
For ease of use, the standard ISO 520. 1977 made the following editorial changes.
--- The "this International Standard" be replaced by "this standard";
--- Decimal by decimal points instead of the original text, "", ".";
--- The relevant formulas are numbered.
This standard replaces GB/T 5519-1988 "Determination of grain and oil grain weight."
The main changes compared to 5519-1988 standard and GB/T as follows.
--- Define the scope of this standard;
--- Increasing the term of the corresponding English word;
--- Adjustment apparatus and appliances;
--- Revised procedure;
--- Revised representation formula;
--- Increased requirements for the test report.
The standard proposed by the National Food Authority.
This standard by the National Standardization Technical Committee OILS.
This standard was drafted. Henan University, Qinghai Province, grain and oil detection and Prevention, Fujian Province, grain and oil quality monitoring of the Henan grain storage trade
Ltd., Liaoning Province, grain and oil inspection monitoring of.
Drafters of this standard. Wu Chun-rong, Zhang Pengfei, Huang Jianli, Weijiade new, Tang Huai-jian, Qiao Lina.
This standard replaces the standards previously issued as follows.
--- GB 5519-1985, GB/T 5519-1988.
Determination of cereals and legumes Weighty
1 Scope
This standard specifies the food and fuel grain weight measurement terms and definitions, principles, apparatus and appliances, procedures, and test results are shown
report.
This standard applies to the determination of commodity grain and oil of kernel mass.
This standard does not apply to sowing seeds.
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/T 5497 grain and oilseeds - Determination of water test
GB/T 21305 Cereals and cereal products - Determination of the conventional water method (GB/T 21305-2007, ISO 712.1998, IDT)
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1
Including water quality grain, including the 1000 sample.
3.2
Correction quality grain moisture content after the 1000 sample.
Principle 4
Reap the full sample were counted and weighed. Divided grains with intact grain quality, with 1000 showing quality results.
5 apparatus and appliances
5.1 grain counter or manual counting.
5.2 Balance. dividing the value of 0.01g.
6 steps
6.1 Determination of grain weight
Randomly picked from a sample of about 500 complete tablets, weigh (m1 0), accurate to 0.01g; record grains sample (N). Each sample
Should parallel determination twice.
If the sample contains not peeling and peeling of grain, should be separately measured and calculated.
Grain should be treated as two twin oat grain were measured.
6.2 Determination of dry grain weight
To remove impurities in the sample, according to the procedure GB/T 21305 stipulated determination of moisture content of the complete grain (H); for legumes and oilseeds, should
Determination of moisture by GB/T 5497 provisions 105 ℃ drying method. 6.1 Determination of grain weight and press.
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