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GB/T 7416-2008 English PDF (GBT7416-2008)
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GB/T 7416-2008: Malting barley
GB/T 7416-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 67.060
B 22
Replacing GB/T 7416-2000
Malting barley
ISSUED ON: JUNE 25, 2008
IMPLEMENTED ON: JUNE 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
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 Product classification ... 7
5 Requirements ... 7
6 Analysis method ... 8
7 Inspection rules ... 16
8 Marking, packaging, transportation and storage ... 17
Appendix A (Informative) Analysis method of self-controlled technical indicators of
enterprises ... 19
Malting barley
1 Scope
This Standard specifies the terms and definitions, product classification, requirements,
analysis methods, inspection rules, marking, packaging, transportation and storage of
malting barley.
This Standard applies to the acquisition, inspection and sale of barley specially used for
beer brewing.
2 Normative references
The terms in the following documents become the terms of this Standard by reference
to this Standard. For dated references, all subsequent amendments (not including errata
content) or revisions do not apply to this standard. However, parties to agreements that
are based on this Standard are encouraged to study whether the latest versions of these
documents can be used. For undated references, the latest edition applies to this
Standard.
GB/T 191, Packaging - Pictorial marking for handling of goods
GB/T 601, Chemical reagent - Preparations of reference titration solutions
GB/T 603, Chemical reagent - Preparations of reagent solutions for use in test
methods (GB/T 603-2002, neq ISO 6353-1:1982)
GB 2715, Hygienic standard for grains
GB/T 5491, Inspection of grain and oilseeds - Methods for sampling and sample
reduction
GB/T 6682, Water for analytical laboratory use - Specification and test methods
(GB/T 6682-1992, neq ISO 3696:1987)
3 Terms and definitions
The following terms and definitions are applicable to this Standard.
3.1
malting barley
Express the results obtained to integers.
6.6.2.4 Precision
The absolute difference of two independent test results under repeatability cannot
exceed 2% of the arithmetic mean value.
6.7 Protein
6.7.1 Principle
Under the action of a catalyst, use sulfuric acid to decompose the sample, so that the
nitrogen in the organic compound is converted into ammonia, and the distilled ammonia
is absorbed by the boric acid solution; determine the nitrogen content by the acid-base
titration method.
6.7.2 Reagents and solutions
6.7.2.1 Ammonia-free water: prepared according to GB/T 603.
6.7.2.2 Concentrated sulfuric acid: 95% ~ 98%.
6.7.2.3 Sodium hydroxide solution (400 g/L): Weigh 400 g of sodium hydroxide and
dissolve it in 1 L of ammonia-free water; let stand. Pipette the supernatant into a bottle
with a rubber stopper.
6.7.2.4 Boric acid solution (20 g/L): Weigh 20 g of boric acid, dissolve it in water, and
dilute to 1 L.
6.7.2.5 Hydrochloric acid standard titration solution [c (HCl) = 0.1 mol/L]: prepared
and calibrated according to GB/T 601.
6.7.2.6 Mixed catalyst: Mix potassium sulfate (K2SO4) and copper sulfate
(CuSO4·5H2O) in a ratio of 10+1, and grind finely.
6.7.2.7 Bromocresol green indicator solution (1 g/L): prepared according to GB/T 603.
6.7.2.8 Methyl red indicator solution (1g/L): prepared according to GB/T 603.
6.7.2.9 Bromocresol green mixed indicator solution: Pipette bromocresol green ethanol
solution and methyl red ethanol solution in a ratio of 10+4, and mix them evenly.
6.7.3 Apparatus
6.7.3.1 Kjeldahl apparatus: self-assembled instrument or complete set of instruments.
6.7.3.2 Balance: sensitivity 0.1 mg.
6.7.3.3 Acid burette: 50 mL.
V2 – volume of hydrochloric acid standard titration solution consumed during titration
of test pieces, in milliliters (mL);
V1 – volume of hydrochloric acid standard titration solution consumed during blank
titration, in milliliters (mL);
c – concentration of the hydrochloric acid standard titration solution, in moles per liter
(mol/L);
14 – value of the molar mass of nitrogen, in grams per mole (g/mol) [M (N) = 14];
m – mass of the weighed test pieces, in grams (g);
X1 – mass fraction of water content of test pieces, %;
6.25 – conversion factor of nitrogen and protein.
Express the results obtained to one decimal place.
6.7.6 Precision
The absolute difference of two independent test results obtained under repeatability
cannot exceed 4% of the arithmetic mean value.
6.8 Plump grains and thin grains
6.8.1 Principle
The barley sample is sieved by kernel size in a vibrating three-layer sieve deck with
different hole sizes.
6.8.2 Apparatus
6.8.2.1 Balance: sensitivity 0.1 g.
6.8.2.2 Separator: Driven by the motor through the crankshaft, it is equipped with 3
layers of sieve plates with a vertical distance of 12 mm ~ 25 mm, and has a cover and
a chassis. The total height of the whole machine is 80 mm ~ 100 mm.
The separator shall meet the following requirements:
Sieve plate material: made of hard brass with a thickness of 1.3 mm ± 0.1 mm, with
strip holes on it, and a processing tolerance of 0.03 mm.
Sieve plate size: 43 cm in length, 15 cm in width.
Sieve hole size: The upper part is 25 mm in length, and the lower part is 22 mm in
length. Width: 2.8 mm for sieve I, 2.5 mm for sieve II, and 2.2 mm for sieve III.
7.3.1 During acceptance, the corresponding quality inspection department is
responsible for inspecting batch by batch according to the provisions of this Standard.
7.3.2 The acceptance inspection items include: net content, sensory requirements,
foreign materials, damage rate, water content, thousand kernels weight, 3-day
germination rate, 5-day germination rate, protein, plump grains, and thin grains.
7.4 Determination rules
7.4.1 Take specimens according to Table 4, and check the packaging and net content
first. Where the inspection result reaches the rejection number, judge the whole batch
of products as unqualified.
7.4.2 Among the physical and chemical indicators, water content and 5-day germination
rate are the main indicators of the quality grade. When other indicators are of the same
grade, but one of the indicators of water content or 5-day germination rate is not of this
grade, the grade of this indicator shall prevail.
7.4.3 Among the physical and chemical indicators, if all other indicators are of the same
grade, and only one indicator (except water content and 5-day germination rate) is lower
than this grade, it will not be degraded. But if the indicator is lower than the next grade,
it will be downgraded to the next one.
7.4.4 Among the physical and chemical indicators, when all other indicators are of the
same grade, but two indicators (except water content and 5-day germination rate) are
lower than this grade, it will be downgraded to the next one.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 When the malting barley is transported to the grain depot or a specified place, the
place of origin, variety name, harvest time, purchase date, category and grade shall be
marked.
8.1.2 The products sold shall have a quality certificate, and shall be indicated with the
name and address of the manufacturer, product name and variety, batch number, net
Get QUOTATION in 1-minute: Click GB/T 7416-2008
Historical versions: GB/T 7416-2008
Preview True-PDF (Reload/Scroll if blank)
GB/T 7416-2008: Malting barley
GB/T 7416-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 67.060
B 22
Replacing GB/T 7416-2000
Malting barley
ISSUED ON: JUNE 25, 2008
IMPLEMENTED ON: JUNE 01, 2009
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
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 Product classification ... 7
5 Requirements ... 7
6 Analysis method ... 8
7 Inspection rules ... 16
8 Marking, packaging, transportation and storage ... 17
Appendix A (Informative) Analysis method of self-controlled technical indicators of
enterprises ... 19
Malting barley
1 Scope
This Standard specifies the terms and definitions, product classification, requirements,
analysis methods, inspection rules, marking, packaging, transportation and storage of
malting barley.
This Standard applies to the acquisition, inspection and sale of barley specially used for
beer brewing.
2 Normative references
The terms in the following documents become the terms of this Standard by reference
to this Standard. For dated references, all subsequent amendments (not including errata
content) or revisions do not apply to this standard. However, parties to agreements that
are based on this Standard are encouraged to study whether the latest versions of these
documents can be used. For undated references, the latest edition applies to this
Standard.
GB/T 191, Packaging - Pictorial marking for handling of goods
GB/T 601, Chemical reagent - Preparations of reference titration solutions
GB/T 603, Chemical reagent - Preparations of reagent solutions for use in test
methods (GB/T 603-2002, neq ISO 6353-1:1982)
GB 2715, Hygienic standard for grains
GB/T 5491, Inspection of grain and oilseeds - Methods for sampling and sample
reduction
GB/T 6682, Water for analytical laboratory use - Specification and test methods
(GB/T 6682-1992, neq ISO 3696:1987)
3 Terms and definitions
The following terms and definitions are applicable to this Standard.
3.1
malting barley
Express the results obtained to integers.
6.6.2.4 Precision
The absolute difference of two independent test results under repeatability cannot
exceed 2% of the arithmetic mean value.
6.7 Protein
6.7.1 Principle
Under the action of a catalyst, use sulfuric acid to decompose the sample, so that the
nitrogen in the organic compound is converted into ammonia, and the distilled ammonia
is absorbed by the boric acid solution; determine the nitrogen content by the acid-base
titration method.
6.7.2 Reagents and solutions
6.7.2.1 Ammonia-free water: prepared according to GB/T 603.
6.7.2.2 Concentrated sulfuric acid: 95% ~ 98%.
6.7.2.3 Sodium hydroxide solution (400 g/L): Weigh 400 g of sodium hydroxide and
dissolve it in 1 L of ammonia-free water; let stand. Pipette the supernatant into a bottle
with a rubber stopper.
6.7.2.4 Boric acid solution (20 g/L): Weigh 20 g of boric acid, dissolve it in water, and
dilute to 1 L.
6.7.2.5 Hydrochloric acid standard titration solution [c (HCl) = 0.1 mol/L]: prepared
and calibrated according to GB/T 601.
6.7.2.6 Mixed catalyst: Mix potassium sulfate (K2SO4) and copper sulfate
(CuSO4·5H2O) in a ratio of 10+1, and grind finely.
6.7.2.7 Bromocresol green indicator solution (1 g/L): prepared according to GB/T 603.
6.7.2.8 Methyl red indicator solution (1g/L): prepared according to GB/T 603.
6.7.2.9 Bromocresol green mixed indicator solution: Pipette bromocresol green ethanol
solution and methyl red ethanol solution in a ratio of 10+4, and mix them evenly.
6.7.3 Apparatus
6.7.3.1 Kjeldahl apparatus: self-assembled instrument or complete set of instruments.
6.7.3.2 Balance: sensitivity 0.1 mg.
6.7.3.3 Acid burette: 50 mL.
V2 – volume of hydrochloric acid standard titration solution consumed during titration
of test pieces, in milliliters (mL);
V1 – volume of hydrochloric acid standard titration solution consumed during blank
titration, in milliliters (mL);
c – concentration of the hydrochloric acid standard titration solution, in moles per liter
(mol/L);
14 – value of the molar mass of nitrogen, in grams per mole (g/mol) [M (N) = 14];
m – mass of the weighed test pieces, in grams (g);
X1 – mass fraction of water content of test pieces, %;
6.25 – conversion factor of nitrogen and protein.
Express the results obtained to one decimal place.
6.7.6 Precision
The absolute difference of two independent test results obtained under repeatability
cannot exceed 4% of the arithmetic mean value.
6.8 Plump grains and thin grains
6.8.1 Principle
The barley sample is sieved by kernel size in a vibrating three-layer sieve deck with
different hole sizes.
6.8.2 Apparatus
6.8.2.1 Balance: sensitivity 0.1 g.
6.8.2.2 Separator: Driven by the motor through the crankshaft, it is equipped with 3
layers of sieve plates with a vertical distance of 12 mm ~ 25 mm, and has a cover and
a chassis. The total height of the whole machine is 80 mm ~ 100 mm.
The separator shall meet the following requirements:
Sieve plate material: made of hard brass with a thickness of 1.3 mm ± 0.1 mm, with
strip holes on it, and a processing tolerance of 0.03 mm.
Sieve plate size: 43 cm in length, 15 cm in width.
Sieve hole size: The upper part is 25 mm in length, and the lower part is 22 mm in
length. Width: 2.8 mm for sieve I, 2.5 mm for sieve II, and 2.2 mm for sieve III.
7.3.1 During acceptance, the corresponding quality inspection department is
responsible for inspecting batch by batch according to the provisions of this Standard.
7.3.2 The acceptance inspection items include: net content, sensory requirements,
foreign materials, damage rate, water content, thousand kernels weight, 3-day
germination rate, 5-day germination rate, protein, plump grains, and thin grains.
7.4 Determination rules
7.4.1 Take specimens according to Table 4, and check the packaging and net content
first. Where the inspection result reaches the rejection number, judge the whole batch
of products as unqualified.
7.4.2 Among the physical and chemical indicators, water content and 5-day germination
rate are the main indicators of the quality grade. When other indicators are of the same
grade, but one of the indicators of water content or 5-day germination rate is not of this
grade, the grade of this indicator shall prevail.
7.4.3 Among the physical and chemical indicators, if all other indicators are of the same
grade, and only one indicator (except water content and 5-day germination rate) is lower
than this grade, it will not be degraded. But if the indicator is lower than the next grade,
it will be downgraded to the next one.
7.4.4 Among the physical and chemical indicators, when all other indicators are of the
same grade, but two indicators (except water content and 5-day germination rate) are
lower than this grade, it will be downgraded to the next one.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 When the malting barley is transported to the grain depot or a specified place, the
place of origin, variety name, harvest time, purchase date, category and grade shall be
marked.
8.1.2 The products sold shall have a quality certificate, and shall be indicated with the
name and address of the manufacturer, product name and variety, batch number, net
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