GB/T 8967-2007 PDF English
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| GB/T 8967-2007 | English | 130 |
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Monosodium L-glutamate
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| GB/T 8967-2000 | English | 639 |
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Monosodium L-glutamate (99% Wei jing)
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| GB/T 8967-1988 | English | RFQ |
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Monosodium L-glutamate
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GB
ICS 67.220.10
X 66
National Standard
of the People’s Republic of China
Replacing GB/T 8967-2000
Monosodium L-glutamate
Issued on. FEBRUARY 2, 2007
Implemented on. DECEMBER 1, 2007
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration Committee.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Chemical name, molecular formula, structural formula, and relative
molecular mass... 5
4 Terms and definitions... 5
5 Classification... 6
6 Requirements... 6
7 Analysis methods... 8
8 Test rules... 21
9 Marking, packaging, transportation, and storage... 23
Annex A... 24
Annex B... 30
Foreword
This Standard is not equivalent to “Monosodium L-glutamate” standard in the 7th
edition of Japanese “Specifications and Standards for Food Additives”. This Standard
incorporates relevant contents in QB 1500-1992 “MSG”, and it is a revision to GB/T
8967-2000 “Monosodium L-glutamate (99% MSG)”.
This Standard replaces GB/T 8967-2000, from the date of execution; QB 1500-1992
shall be invalidated accordingly.
Compared with GB/T 8967-2000, the main changes of this Standard are as follows.
— CHANGE the name to Monosodium L-glutamate (MSG);
— DEFINE the monosodium L-glutamate (MSG), salted MSG, and special
delicious MSG;
— CLASSIFY the monosodium L-glutamate (MSG);
— The hygienic requirements shall execute the relevant hygienic standards;
therefore, this Standard has no requirement;
— Methods for analysis of chloride. ADD the potassium chromate indicator method
(applicable to chromate added with edible salt);
— Visible turbidimetric methods for sulfate. there is difference at detail-level for
MSG, special delicious MSG, and salted MSG;
— ADD the determination of three flavor enhancers in special delicious MSG.
Annex A of this Standard is normative, and Annex B is informative.
This Standard shall be under the jurisdiction of the Subcommittee of Industrial
Fermentation of National Technical Committee on Food Industry of Standardization
Administration of China.
Drafting organizations of this Standard. China National Research Institute of Food &
Fermentation Industries, BBCA Biochemical Co., Ltd., Hangzhou West Lake MSG
Group Co., Ltd., Zhejiang Mifeng Group Co., Ltd., Shenyang Hongmei Enterprise
Group Co., Ltd., and Hebei Meihua Holding Group Co., Ltd.
Main drafters of this Standard. Zhang Wei, Chang Zhuxia, Cheng Changping, Gong
Xuming, Shi Zhongke, and Liu Senzhi.
The previous versions replaced by this Standard are as follows.
— GB 8967-1988, GB/T 8967-2000.
Monosodium L-glutamate
1 Scope
This Standard specifies monosodium L-glutamate’s (MSG) terms and definitions,
classification, requirements, analysis methods, test rules, marking, packaging,
transportation, and storage.
This Standard applies to monosodium L-glutamate (MSG).
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 corrections) 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 191 Packaging - Pictorial marking for handling of goods (GB/T 191-2008, eqv
ISO 780.1997)
GB/T 601 Chemical reagent - Preparations of standard volumetric solutions
GB/T 602-2002 Chemical reagent - Preparations of standard solutions for impurity
(ISO 6353-1.1982, NEQ)
GB 2720 Hygienic standard for weijing (gourmet powder)
GB/T 5009.43 Method for analysis of hygienic standard of monosodium glutamate
GB/T 6682-1992 Water for laboratory use; Specifications
GB 7718 General standard for the labeling of prepackaged foods
JJF 1070 Rules of Metrological Testing for Net Quantity of Products in
Prepackages with Fixed Content
3 Chemical name, molecular formula, structural formula, and relative molecular mass
3.1 Chemical name. L-glutamic acid monosodium monohydrate (L-α-aminoglutaric
acid monosodium monohydrate).
3.4 Structural formula.
4 Terms and definitions
The following terms and definitions are applicable to this Standard.
4.1
Monosodium L-glutamate (MSG)
A white crystal or powder, containing 99.0% or above of monosodium L-glutamate and
having special flavor, prepared from starchiness and sugar by microbial
(corynebacterium glutamicum, etc.) fermentation, extraction, neutralization, and
crystallization.
4.2
Salted monosodium L-glutamate
A uniform mixture in which a definite quantity of refined salt is added to the
monosodium L-glutamate (MSG).
5 Classification
It is classified into three categories according to added ingredients.
5.1 Monosodium L-glutamate.
5.2 Salted monosodium L-glutamate.
6 Requirements
6.1 Requirements of raw and auxiliary materials
It shall compliance with relevant product standards and hygienic standards. For rice,
there is no requirement to “imperfect grain” and “broken rice”.
6.2 Sensory requirements
Colorless or white crystalline particles or powder, easily soluble in water, having no
impurities visible to the naked eye; with special flour, and no odor.
6.3 Physiochemical requirements
6.4 Hygienic requirements
The hygienic requirements shall meet the requirements of GB 2720.
6.5 Net content
The net content shall comply with the No. 75 [2005] Order of the General
Administration of Quality Supervision, Inspection and Quarantine.
7 Analysis methods
The water involved in this Standard, if not otherwise specified, refers to the water that
complies with GB/T 6682-1992.
7.1 Appearance
WEIGH about 10g of samples. OBSERVE them with the naked eye. SMELL and taste
them. And then make a judgment and keep a good record.
7.2 Identification test
CONDUCT according to Annex B.
7.3 Content of monosodium L-glutamate
7.3.1 Perchloric acid non-aqueous titration
7.3.1.4 Analysis procedures
7.3.1.4.1 Potentiometric titration
HANDLE the electrode and calibrate the potentiometric titrator according to the
operation instructions. WEIGH 0.15g of samples with a small beaker, accurate to
0.0001g. ADD 3mL of formic acid (7.3.1.3.3) in the beaker; stir it until it is completely
dissolved.
7.3.1.4.2 Indicator method
WEIGH 0.15g of samples (accurate to 0.0001g) into a triangular flask. ADD 3mL of
formic acid (7.3.1.3.3) in the flask; stir it until it is completely dissolved. Then ADD
30mL of acetic acid (7.3.1.3.2) and 10 drops of α-naphtholbenzein methanol-acetic
acid indicator solution (7.3.1.3.4).
7.3.1.6 Tolerance
The mean relative deviation of the test results of the same sample shall not be greater
than 0.3%.
7.3.2 Polarimetry
7.3.2.1 Principle
The molecular structure of monosodium L-glutamate has an asymmetric carbon atom
in it. The asymmetric carbon atom, of optical activity, can allow the polarization plane
to rotate an angle, so that a polarimeter can be used to determine optical rotation,
which can be converted into the content of monosodium L-glutamate.
7.3.2.2 Instruments
Polarimeter (accuracy is ±0.01°), with natrium lamps (sodium spectrum D-line is
589.3nm).
7.4 Light transmittance
7.4.1 Instruments
721-type spectrophotometer.
7.4.2 Analysis procedures
WEIGH 10g of samples (accurate to 0.1g). DISSOLVE it in water and dilute to 100mL.
SHAKE the mixture well. USE a 1cm cuvette to measure the light transmittance of the
test solution at 430nm wave length, with water as blank control. RECORD the
readings.
7.4.3 Tolerance
The absolute difference of the two test results of the same sample shall not exceed
0.2% of the arithmetic mean.
7.5 Specific rotation
7.5.1 Principle
Similar to 7.3.2.1.
7.5.2 Instruments
Similar to 7.3.2.2.
7.5.3 Reagents
Similar to 7.3.2.3.
7.5.4 Analysis procedures
Similar to 7.3.2.4.
7.5.5 Calculation
7.6 Chloride
7.6.1 Turbidimetry (applicable to traces of chloride)
7.6.1.1 Principle
Traces of chloride ions in the sample solution react with silver nitrate to produce
precipitated silver chloride, whose turbidity is compared with the silver chloride
produced from standard chloride ions. Visible turbidimetric method is conducted.
7.6.1.2 Reagents and solutions
7.6.1.2.1 Nitric acid
7.6.1.2.2 Chloride standard solution (1mL of solution contains 0.1mg of
chloride)
Prepared according to GB/T 602.
8 Test rules
8.1 Batch
A batch of products refers to that with the same-manufacturer, same-name,
same-specifications, same-trademark, same-batch number, and same-quality
certificate.
8.2 Sampling
DRAW samples according to Table 4.
8.3 Sampling volume and methods
The sampling volume of every batch is 500g. If the sample volume drawn according to
Table 4 is insufficient, additional samples can be drawn in proportion. After sampling,
mix them immediately well.
8.4 Factory inspection
8.4.1 The product shall be inspected batch-by-batch according to this Standard before
delivery.
8.4.2 Items of factory inspection
8.4.2.1 Monosodium L-glutamate (MSG). package, net content, content of
monosodium L-glutamate, light transmittance, specific rotation, loss on drying, ferrum,
sulfate.
8.5 Type inspection
The type inspection involves all items in the sensory, physiochemical, and hygienic
requirements as stated in this Standard. The product is normally subject to a type
inspection every quarter. In case of any of the following situations, type inspection is
also necessary.
8.6 Determination rules
8.6.1 If one item is unsatisfactory in the inspection results, double volume of samples
shall be drawn from the same batch for re-inspection, and the re-inspection result
shall prevail. If there is still one item unsatisfactory in re-inspection, the whole batch
will be determined as unsatisfactory.
9 Marking, packaging, transportation, and storage
9.1 Marking
9.2 Packaging
9.2.1 The inner packaging material of products shall meet hygienic requirements of
packaging material for food.
9.2.2 Packaging requirements. the inner package shall be airtight. The outer package
shall not be polluted.
9.3 Transportation and storage
9.3.1 The product shall be handled gently and prevented from pollution, rain, and
insolation in transportation.
9.3.2 The means of transportation shall be clean, nontoxic, and pollution-free. It is
strictly prohibited to transport the products with toxic, hazardous, and corrosive
substance.
9.3.3 The product shall be stored in a cool, dry, ventilated, and pollution-free place.
Outdoor storage is not allowed.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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