GB/T 19541-2017 English PDF (GBT19541-2017)

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GB/T 19541-2017: Feed materials -- Soybean meal
GB/T 19541-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 65.120
B 46
Replacing GB/T 19541-2004
Feed materials - Soybean meal
ISSUED ON. JULY 12, 2017
IMPLEMENTED ON. FEBRUARY 01, 2018
Issued by. General Administration of Quality Supervision Inspection and
Quarantine of PRC;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 6 
4 Requirements ... 6 
5 Test methods ... 7 
6 Inspection rules ... 8 
7 Labeling, packaging, transportation and storage ... 9 
Appendix A (Normative) Determination of solubility of potassium hydroxide
protein ... 10 
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 19541-2004 “Soybean meal for feed”. As
compared with GB/T 19541-2004, except for editorial changes, the main
technical changes are as follows.
- CHANGE the standard name from “Soybean meal for feed” to “Feed
materials - Soybean meal”;
- MODIFY the scope of the standard (see clause 1);
- MODIFY the normative references (see clause 2);
- In the sensory traits, DELETE the pale brown, ADD the light brown or
reddish brown, ADD the coarse granules, DELETE the agglomeration (see
4.1);
- DELETE the inclusion index (see clause 4.2 of the 2004 version);
- MODIFY the quality grade indicator (see 4.2);
- ADD the net content requirements (see 4.4);
- DELETE the inspection of inclusions (see clause 5.1 of the 2004 version);
- MODIFY the inspection of sensory traits and urease activity (see 5.1 and
5.7);
- ADD the inspection of lysine, hygiene indicators and net content (see 5.6,
5.9 and 5.10);
- MOVE the method for determining the solubility of potassium hydroxide
protein to Appendix A (see 5.8);
- DELETE the tolerances in the test method as well as the requirements for
monitoring and arbitration (see 5.8 and 5.9 of the 2004 version);
- MODIFY the inspection rules (see clause 6);
- ADD that the soybean meal which is produced by the use of genetically
modified soybeans shall follow the provisions of the “Administrative
measures for the identification of agricultural genetically modified
organisms” (see 7.1);
- MODIFY the determination of the solubility of potassium hydroxide protein
(see Appendix A).
Feed materials - Soybean meal
1 Scope
This standard specifies the relevant terms and definitions, requirements, test
methods, inspection rules, labeling, packaging, transportation and storage of
feed materials - soybean meal.
This standard is applicable to feed materials - soybean meal, which is obtained
by oil extraction through pre-pressing digestion or direct solvent digestion of
soybean; or feed materials - soybean meal, which is obtained by oil extraction
through digestion of soybean cake; or feed materials - soybean meal, which is
obtained by oil extraction of soybean hull through expansion digestion oil-
making process.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB/T 6432 Method for the determination of crude protein in feedstuffs
GB/T 6434 Feeding stuffs - Determination of crude fiber content - Method
with intermediate filtration
GB/T 6435 Determination of moisture in feedstuffs
GB/T 6438 Method for the determination of crude ash in feedstuffs
GB/T 6682 Water for analytical laboratory use - Specification and test
methods
GB/T 8622 Determination of urease activity in soya bean products for feeds
GB 10648 Feed label
GB 13078 Hygienical standards for feeds
GB/T 14698-2002 Method of feed microscopy
GB/T 14699.1 14699.1-2005 Feeding stuffs - Sampling
It shall be performed in accordance with the provisions of GB/T 18246.
5.7 Urease activity
It shall be performed in accordance with the provisions of GB/T 8622.
5.8 Potassium hydroxide protein’s solubility
It shall be performed in accordance with the provisions of Appendix A.
5.9 Hygiene indicators
It shall be performed in accordance with the provisions of GB 13078.
5.10 Net content
It shall be performed in accordance with the provisions of JJF 1070.
6 Inspection rules
6.1 Group-batch
The products which are continuously manufactured using the same batch of
raw materials and the same process at the same production day with the same
specifications form one batch.
6.2 Sampling
It is performed in accordance with the provisions of GB/T 14699.1.
6.3 Exit-factory inspection
Sensory traits, moisture, crude protein, and urease activity are exit-factory
inspection items.
6.4 Type inspection
In one of the following cases, a type inspection shall be carried out, the
inspection items shall include all items specified in this standard.
a) After formal production, when there is a big change in raw materials and
processes;
b) After formal production, type inspection is carried out once every six
months;
c) When the production is restored after suspension for more than three
months;
Appendix A
(Normative)
Determination of solubility of potassium hydroxide protein
A.1 Principle of the method
The solubility of crude protein of soybean meal in potassium hydroxide solution
is affected by the degree of thermal processing. Under the specified conditions,
the crude protein content of the soybean meal sample which is dissolved in the
potassium hydroxide solution as well as the crude protein content of the sample
are respectively determined, the ratio of the contents of the two is calculated to
obtain the solubility of the potassium hydroxide protein.
A.2 Reagent
Unless otherwise specified, it only uses the analytically pure reagents.
A.2.1 Water, GB/T 6682, grade 3.
A.2.2 0.2% potassium hydroxide solution. WEIGH the appropriate amount of
potassium hydroxide (corresponding to 2.00 g of potassium hydroxide),
DISSOLVE it in water, DILUTE and MAKE its volume reach to 1 L (pH = 12.5).
A.3 Instruments
A.3.1 Laboratory sample crusher. No strong heat shall be generated during
pulverization.
A.3.2 Sample sieve. The pore size is 0.25 mm.
A.3.3 Analytical balance. The sensitivity is 0.0001 g.
A.3.4 Magnetic stirrer. The speed of the magnet is 700 r/min; the stirring magnet
is elliptical, octagonal, middle diameter 8 mm, length 25 mm.
A.3.5 Centrifuge. The relative centrifugal force is 1100.28 x g (equivalent to
2700 r/min), it is equipped with 80 mL centrifuge tube with lid.
A.3.6 High beaker. 250 mL, outer diameter 60 mm.
A.4 Preparation of specimen
It is performed in accordance with the provisions of GB/T 20195, make the
crushed sample pass through the 0.25 mm aperture sample sieve, mix it
thoroughly, contain it into the stoppered grinding-mouth jar to prepare for use.