Inspection of grain and oilseeds—Determination of pure kernel yield of unhulled oilseeds

This standard is a revision of GB/T5499-1985 "Grain and Oilseed Inspection Method for Pure Kernel Rate of Shelled Oilseeds". This standard replaces GB/T5499-1985 from the date of implementation. This standard specifies the terms and definitions, instruments and equipment, sample preparation, operating procedures and result calculation for the pure kernel rate inspection of shelled oilseeds. This standard is applicable to shelled oilseeds. The main changes of this standard compared with GB/T5499-1985 are as follows: - Changing "grain and oilseed inspection" in the standard name to "grain and oil inspection"; - Adding "normative reference documents"; - Adding "terms and definitions"; - Integrating and rearranging the technical contents. GB/T 5499-2008 Grain and Oil Inspection Method for Pure Kernel Rate of Shelled Oilseeds GB/T5499-2008 Standard Download Decompression Password: www.bzxz.net
This standard is a revision of GB/T5499-1985 "Grain and Oilseed Inspection Method for Pure Kernel Rate of Shelled Oilseeds". This standard replaces GB/T5499-1985 from the date of implementation. This standard specifies the terms and definitions, instruments and equipment, sample preparation, operating procedures and result calculation for the pure kernel rate test of shelled oilseeds. This standard applies to shelled oilseeds. The main changes of this standard compared with GB/T 5499-1985 are as follows: ———Change "grain and oil inspection" in the standard name to "grain and oil inspection"; ———Add "normative reference documents"; ———Add "terms and definitions"; ———Integrate and rearrange the technical contents.

The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard.
GB5491 Sampling and sub-sampling method for grain and oil inspection
GB/T5494 Inspection method for impurities and imperfect grains in grain and oil inspection

ICS67.200.20
National Standard of the People's Republic of China
GB/T5499—2008
Replaces GB/T5499—1985
Inspection of grain and oilseeds
Determination of pure kernel yield of unhulled oilseeds
Inspection of grain and oilseedsDetermination of pure kernel yield of unhulled oilseeds2008-07-16Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandardization Administration of the People's Republic of China
Implementation on 2008-11-01
GB/T5499—2008
This standard is a revision of GB/T5499-—1985 "Inspection of grain and oilseeds - Determination of pure kernel yield of unhulled oilseeds". The main changes of this standard compared with GB/T5499-1985 are as follows: -Change "grain and oil inspection" in the standard name to "grain and oil inspection", and add "normative reference documents";
-Add "terms and definitions";
-Integrate and rearrange the technical contents.
This standard replaces GB/T5499-1985 from the date of implementation. This standard is proposed by the State Administration of Grain.
This standard is under the jurisdiction of the National Technical Committee for Grain and Oil Standardization. The drafting units of this standard: Hubei Grain and Oil Food Quality Monitoring Station, Chaobei Xiangyang Wanbao Grain and Oil Group. The main drafters of this standard: Zhu Zhiming, Xiong Ning, Wang Yan, Liu Yong, Liu Li. The previous versions of the standards replaced by this standard are: GB/T5499-1985.
1 Scope
Grain and oil inspection - Test method for pure kernel rate of shelled oilseeds GB/T5499-2008
This standard specifies the terms and definitions, instruments and equipment, sample preparation, operating procedures and result calculation for the test of pure kernel rate of shelled oilseeds. This standard applies to shelled oilseeds.
2 Normative references
The clauses in the following documents become the clauses of this standard through reference in this standard. For dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest versions of these documents apply to this standard. GB5491 Grain and oilseed inspection - Sampling and splitting method GB/T5494 Grain and oilseed inspection - Test method for impurities and imperfect kernels 3 Terms and definitions
The following terms and definitions apply to this standard. 3.1
Pure kernel yield
The mass fraction of the kernels with use value obtained after shelling the net sample of shelled oilseed (of which imperfect kernels are calculated by half) in the net sample.
4 Instruments and equipment
4.1 Sample divider: a conical sample divider or a multi-outlet sample divider with a distribution system. 4.2 Balance: one balance with a sensitivity of 0.1g and one balance with a sensitivity of 0.01g. 4.3 Analysis plate.
4.4 Tweezers.
4.5 Surface blood.
5 Sample preparation
5.1 Sampling and sample division shall be carried out in accordance with the provisions of GB5491. 5.2 Remove impurities from the sample and remove the kernels from the fruit in accordance with the provisions of GB/T5494 to obtain a net sample. 6 Operation steps
6.1 Weighing the sample
Weigh the clean sample specified in 5.2. Weigh 200g of large particles such as peanuts, tea seeds, and tung seeds, accurate to 0.1g; weigh 20g of small and medium particles such as sunflower seeds and cotton seeds, accurate to 0.01g. 6.2 Shelling
Peanuts are shelled by hand; tea seeds and tung seeds are shelled after gently breaking the shell with a hammer; sunflower seeds are shelled with a forge or by hand; cotton seeds are shelled with scissors and tweezers. The sample is shelled, selected and separated to obtain the kernels. The kernels should not be lost during shelling. 6.3 Division and weighing
Select and remove the kernels of no use value from the obtained kernels (6.2), and then weigh (m,) to an accuracy of 0.01g. 1
GB/T5499--2008bzxZ.net
Then separate the imperfect kernels according to the provisions of GB/T5494, and then weigh the imperfect kernels (m,) to an accuracy of 0.01g,7
Result calculation
The pure kernel rate is calculated according to formula (1):
m,-m,/2
Where:
X-pure kernel rate,%;
Total mass of kernels, in grams (g);
-Mass of imperfect kernels, in grams (g);-Mass of net sample, in grams (g). (1)
The calculation result is rounded to one decimal place. The absolute difference between the two test results should not exceed 1.0%, and the average is taken as the test result.
GB/T5499-2008
People's Republic of China
National Standard
Grain and Oil Inspection Method for Pure Kernel Rate of Shelled Oilseeds GB/T5499-2033
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