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GB/T 19541-2004 English PDF (GBT19541-2004)

GB/T 19541-2004 English PDF (GBT19541-2004)

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GB/T 19541-2004: Soybean meal (solvent) for feedstuff

This Standard specifies the technical indicator, quality grade, test method, inspection rules, label, package, transportation and storage of soybean meal (solvent) for feedstuff.
GB/T 19541-2004
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 65.120
B 46
Soybean Meal (Solvent) for Feedstuff
ISSUED ON. JUNE 09, 2004
IMPLEMENTED ON. OCTOBER 01, 2004
Issued by. General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Requirement ... 5
5 Test Method ... 6
6 Inspection Rules ... 8
7 Label, Package, Transportation and Storage ... 9
Foreword
This Standard was prepared on the basis of NY/T 131-1989 Soybean Meal (Solvent) for Feedstuff.
The major differences between this Standard and NY/T 131-1989 are as follows. --- Confirmed that the soybean meal can be divided into soybean meal with husk and soybean meal without husk.
--- Added the definition, permissible value and determination method for the protein solubility of potassium hydroxide.
--- Supplemented the contents of sensory attributes and inclusions.
--- Added the technical indicator and quality grade of the soybean meal without husk; modified the technical indicator and quality grade of the soybean meal with husk. --- Added the two-test allowable error for the test determination value. --- Added the analytical allowable error when judging whether each indicator qualified by monitoring and arbitrating.
--- Added inspection rules.
NY/T 131-1989 shall be abolished immediately since the implementation date of this Standard.
This Standard was proposed by General Administration of Quality Supervision, Inspection and Quarantine.
This Standard shall be under the jurisdiction of National Technical Committee for Standardization of Feedstuff Industry.
Drafting organization of this Standard. MOA Feed Quality Supervision and Testing Center (Jinan).
Participating drafting organization of this Standard. China Feed Industry Association. Drafting staffs of this Standard. Tang Wenli, Li Xiangming, Liu huanlong, Zu Liya, and Sun Yanjun.
Soybean Meal (Solvent) for Feedstuff
1 Scope
This Standard specifies the technical indicator, quality grade, test method, inspection rules, label, package, transportation and storage of soybean meal (solvent) for feedstuff (including the soybean meal with husk and soybean metal without husk). This Standard is applicable to the soybean meal for feedstuff with soybean as the raw material, produced through extraction method, or firstly peeling off the husk, then extracting oil through extraction method. Such product is single-protein feedstuff. 2 Normative References
The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies.
GB/T 6432 Method for the Determination of Crude Protein in Feedstuffs
GB/T 6434 Method for Determination of Crude Fiber in Feedstuffs
GB/T 6435 Method for the 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 8622-1988 Method for the Determination of Urease Activity in Soybean Products
GB 10648 Feed Label
GB 13078 Hygienical Standards for Feeds
GB/T 14698 Method for the Test of Feed Microscopy
GB/T 14699.1-1993 Method for Sampling of Feed
3 Terms and Definitions
The following terms and definitions are applicable to this Standard.
3.1 Protein solubility of potassium hydroxide
Under the specified conditions, the mass percent OF soybean meal sample, soluble in the crude protein of 0.2% potassium hydroxide, ACCOUNTING for the total crude protein of the sample.
4 Requirement
4.1 Sensory attributes
This product is light brown or light yellow, in irregular fragments or coarse powder; the colour is consistent, without fermentation, moldy, caking, moth-eaten, and different odours.
4.2 Inclusions
No substances beyond the soybean meal for feedstuff shall be mixed; if adding the antioxidant, anti-mildew agent, anti-caking agent and the like additives, the adding type and amount shall be instructed.
4.3 Technical indicator and quality grade
See Table 1.
Table 1 -- Technical Indicator and Quality Grade
4.4 Hygienic standard
Items
Soybean Meal with Husk Soybean Meal without Husk
Moisture / (%)
Urease activity (calculated by ammonia nitrogen) /
[mg/(min?€?g)]
Crude protein / (%)
Crude fibre / (%)
Crude ash / (%)
Protein solubility of potassium hydroxide / (%)
NOTE. three indicators of crude protein, crude fibre, crude ash shall be calculated on the basis of 88% or 87% dry matter.
Grade-I Grade-II Grade-I Grade-II
It shall conform to the relevant provisions of GB 13078.
5 Test Method
5.1 Inspection of sensory attributes and inclusions
It shall be performed as per the provisions of GB/T 14698.
5.2 Moisture determination
It shall be performed as per the provisions of GB/T 6435.
5.3 Determination of crude protein
It shall be performed as per the provisions of GB/T 6432.
5.4 Determination of crude fiber
It shall be performed as per the provisions of GB/T 6434.
5.5 Determination of crude ash
It shall be performed as per the provisions of GB/T 6438.
5.6 Determination of urease activity
It shall be performed as per the provisions of GB/T 8622-1988.
5.7 Determination of protein solubility of potassium hydroxide
5.7.1 The protein solubility of potassium hydroxide can reflect the overheating situation of the soybean meal product. For the soybean meal with different heating situation, the protein solubility of potassium hydroxide is different. Firstly, measure the crude protein content in the potassium hydroxide solution that can be soluble by the soybean meal product under the specified conditions; then measure the total crude protein content in the same soybean meal product; and calculate the protein solubility of potassium hydroxide.
5.7.2 Reagents
Unless otherwise specified, only use the reagents that are confirmed as analytically pure in the analysis; the water used shall be Class-III water specified in GB/T 6682. 5.7.2.1 0.2% potassium hydroxide solution. dissolve 2.44g of potassium hydroxide into the water; use water to dilute and make constant value to 1L.
5.7.3 Apparatus
5.7.3.1 Laboratory used sample grinder.
5.7.3.2 Sample sieve. aperture of 0.25mm.
5.7.3.3 Analytical balance. sensibility of 0.0001g.
5.7.3.4 Magnetic stirrer.
5.7.3.5 Centrifuge. rotation speed of 2700r/min above.
5.7.4 Sample preparation
Take the representative soybean meal sample; use the quartering method to shrink and reduce to take about 200g separately; smash, and pass through the sample sieve with aperture 0.25mm; mix thoroughly; install into the grinding bottle for backup. 5.7.5 Determination procedures
Take 1.0g of soybean meal specimen, accurate to 0.1mg; place into the 250mL tall- form beaker; add 50.00mL of potassium hydroxide solution (5.7.2.1); stir for 20min on the magnetic stirrer (5.7.3.4); transfer the solution into the centrifuge tube; centrifuge for 10min at the speed of 2700r/min (5.7.3.5); carefully take 15.00mL of supernatant; place into the digestion tube; measure the crude protein content as per the provisions of GB/T 6432; meanwhile, measure the total crude protein content of the same specimen.
5.7.6 Result calculation
The protein solubility of potassium hydroxide X shall be expressed by mass fraction, and calculated by Formula (1).
Where.
W1 ?€? crude protein content in potassium hydroxide (5.7.2.1) dissolved by soybean meal sample, %;
W2 ?€? total crude protein content of soybean meal sample (take the arithmetic mean of two parallel determination results as the measurement result), %;
The calculation result shall be expressed to 1 digit after the decimal point. 5.7.7 Precision
5.7.7.1 Repeatability
The relative deviation of the two parallel determination results performed in the same laboratory and by the same operator shall be no greater than 2%; while take the arithmetic mean of two parallel determination results as the measurement result. 5.7.7.2 Reproducibility
The relative deviation of two determination results performed in different laboratories, by different operators, with different instruments shall be no greater than 4%. 5.8 Allowable error
The two-test allowable error for the test determination value shall be performed as per the provisions of used method.
5.9 Monitoring and Arbitrating
When judging whether each indicator qualified through monitoring and arbitrating, its analysis allowable error shall be performed as per the provisions of relevant national standard.
6 Inspection Rules
6.1 The moisture, crude protein, crude fiber specified in this Standard belong to the exit-factory inspection items.
6.2 Type insp...

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