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GB/T 8967: Evolution and historical versions
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| GB/T 8967-2025 | English | RFQ |
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Quality requirements for monosodium L-glutamate
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GB/T 8967-2025
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| GB/T 8967-2007 | English | 130 |
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Monosodium L-glutamate
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GB/T 8967-2007
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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 8967-2000
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| GB/T 8967-1988 | English | RFQ |
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Monosodium L-glutamate
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GB/T 8967-1988
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Basic data
| Standard ID | GB/T 8967-2025 (GB/T8967-2025) |
| Description (Translated English) | Quality requirements for monosodium L-glutamate |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | X66 |
| Classification of International Standard | 67.220.10 |
| Date of Issue | 2025-12-02 |
| Date of Implementation | 2027-01-01 |
| Older Standard (superseded by this standard) | GB/T 8967-2007 |
GB/T 8967-2007: Monosodium L-glutamate
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
GB
ICS 67.220.10
X 66
National Standard
of the People’s Republic of China
Replacing GB/T 8967-2000
Monosodium L-glutamate
谷氨酸钠(味精)
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
QB/T 3798 Food additive - Disodium 5’-inosinate+disodium 5’-guanylate
QB/T 3799 Food additive - Disodium guanylate
Measurement supervision and management methods for fixed quantity packaged
commodity (Order by General Administration of Quality Supervision, Inspection
7 Analysis methods
The water involved in this Standard, if not otherwise specified, refers to the water that
complies with GB/T 6682-1992.
The reagent involved in this Standard, if not otherwise specified for the specifications,
refers to analytical reagents (AR). Special requirements shall be expressly provided
otherwise.
The solution involved in this Standard refers to aqueous solution if there is no
indication of which solvent is used to prepare the solution.
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
7.3.1.1 Principle
With the existence of acetic acid, TITRATE the monosodium L-glutamate in the
sample with standard perchloric acid solution; determine its end point by
potentiometric titration or use α-naphtholbenzein as an indicator to titrate the solution
to green as its end point.
7.3.1.2 Instruments
7.3.1.2.1 Automatic potentiometric titrator (accuracy. ±5mV).
7.3.1.2.2 Acidometer.
7.3.1.2.3 Magnetic stirring apparatus.
7.3.1.3 Reagents and solutions
7.3.1.3.1 Standard titration solution of perchloric acid [c(HClO4)=0.1mol/L]. prepared
and standardized according to GB/T 601.
7.3.1.3.2 Acetic acid.
7.3.1.3.3 Formic acid.
specific rotation of the sample is calculated according to formula (4).
Where.
X3 - the specific rotation of the sample, in °;
tD - the specific rotation of the sample solution at t°C, in °;
t - the temperature of the measured sample solution, in °C;
0.047 - temperature correction factor.
The computing result shall be rounded off to the first decimal.
7.5.6 Tolerance
The difference in absolute value between the two test results of the same sample
shall not exceed 0.02%.
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.
7.6.1.2.3 10% (volume fraction) salpeter solution
MEASURE 1-volume nitric acid (7.6.1.2.1) and put it into 9-volume water.
7.6.1.2.4 Silver nitrate standard solution [c(AgNO3)=0.1mol/L]
Prepared and standardized according to GB/T 601.
7.6.1.3 Analysis procedures
Phosphate standard buffer solution (pH 6.86). WEIGH 3.40g of monopotassium
phosphate (KH2PO4) and 3.55g of disodium hydrogen phosphate (Na2HPO4) that has
been pre-dried for 2h at 120°C. DISSOLVE them in water solution without carbon
dioxide; dilute to 1000mL; shake them well.
7.7.4 Analysis procedures
USE phosphate standard buffer solution. CALIBRATE pH meter to set the pH as 6.87
at 25°C. FIX the position. WASH the electrode with water.
WEIGH 5g of samples, accurate to 0.1g. DISSOLVE them in water solution without
carbon dioxide and dilute to 50mL. SHAKE the mixture well, which will serve as
sample solution. WASH the electrode with the sample solution before inserting it into
the sample solution. ADJUST the pH meter’s temperature compensation knob to 25°C;
measure the pH of the sample solution. REPEAT the operation until pH reading
remains steady for 1min. Finally record the results.
The measured result shall be accurate to the first decimal.
7.7.5 Tolerance
The difference in absolute value between the two tests of the same sample shall not
exceed 0.05pH.
7.8 Loss on drying
7.8.1 Principle
DETERMINE the mass of the lost volatile substance by drying method, expressed in
percentage.
7.8.2 The first method - Conventional method
7.8.2.1 Instruments
7.8.2.1.1 Electrically heated drying oven. temperature control of 98°C±1°C.
7.8.2.1.2 Weighing bottle. 50mm×30mm.
7.8.2.1.3 Desiccator. allochroic silica gel.
7.8.2.1.4 Analytical balance. sensibility of 0.1mg.
7.8.2.2 Analysis procedures
WEIGH 5g of samples with a weighing bottle that has been dried to a constant weight,
accurate to 0.0001g. PUT the bottle in the electrically heated drying oven at 98°C±1°C
for 5h. TAKE the bottle out. COVER the bottle and put it into a desiccator. COOL it
down to room temperature (30min). WEIGH it.
Similar to 7.8.2.3.
7.9 Ferrum
7.9.1 Principle
Under acid conditions, ferric irons in the sample solution react with ammonium
rhodanate. Its shade is directly proportional to the concentration of ferric irons. Thus it
is possible for colorimetry.
7.9.2 Instruments
Colorimeter tube. 50mL.
7.9.3 Reagents and solutions
7.9.3.1 Nitric Acid
7.9.3.2 1+1 salpeter solution. MEASURE 1-volume nitric acid (7.9.3.1) and mix it in
1-volume water.
7.9.3.3 Ammonium rhodanate
7.9.3.4 Ammonium rhodanate solution (150g/L). WEIGH 5.0g of ammonium
rhodanate (7.9.3.3). DISSOLVE it in water and dilute the mixture to 100mL.
7.9.3.5 Ferric standard solution I (iron content 0.1g/L). prepared according to GB/T
602.
7.9.3.6 Ferric standard solution II (iron content 0.1g/L). TAKE 10mL of ferric standard
solution I (7.9.3.5) and dilute it with water to 100mL.
7.9.4 Analysis procedures
WEIGH 1g of samples into a colorimetric tube, accurate to 0.1g. ADD 10mL of water
to dissolve them; then add 2mL of salpeter solution (7.9.3.2). SHAKE the mixture well.
SUCK accurately 0.5mL of ferric standard solution II (7.9.3.6) INTO another
colorimetric tube. ADD 9.5mL of water and 2mL of saltpeter solution (7.9.3.2); shake
the mixture well. PUT the two tubes in boiling water for 20min. TAKE them out and
cool them down to room temperature. ADD 10.00mL of ammonium rhodanate solution
(7.9.3.4) to the two tubes respectively; add water to 25mL. SHAKE them well before
visual colorimetry.
If the color of the sample solution tube is not higher than that of the standard tube
solution, the iron content is ≤5mg/kg.
7.10 Sulfate
7.10.1 Principle
Traces of sulfate radicals react with barium chloride in the sample solution to produce
white precipitated barium sulfate, which can be compared with standard turbidity for
determination.
7.10.2 Instruments
7.10.2.1 Colorimeter tube. 50mL.
7.10.2.2 Beaker. 50mL.
7.10.3 Reagents and solutions
7.10.3.1 10% hydrochloric acid solution (volume fraction). WEIGH 1-volume
hydrochloric acid and add 9-volume water.
7.10.3.2 50g/L barium chloride solution. WEIGH 5.0g of barium chloride, dissolve it in
water solution and dilute to 100mL.
7.10.3.3 1.0g/L sulfate standard solution I. WEIGH 1.480g of anhydrous sodium
sulfate, and prepare the solution according to 4.28 in GB/T 602-2002.
7.10.3.4 0.1g/L sulfate standard solution II. prepared according to 4.28 in GB/T
602-2002.
7.10.4 Analysis procedures
7.10.4.1 Monosodium L-glutamate, special delicious monosodium L-glutamate
WEIGH 0.5g of samples into a 50mL colorimetric tube, accurate to 0.01g. ADD 18mL
of water to dissolve them; then add 2mL of hydrochloric acid solution (7.10.3.1).
SHAKE the mixture well. Suck accurately 2.50mL of sulfate standard solution II
(7.10.3.4) into another 50mL colorimetric tube. ADD 15.5mL of water and 2mL of
hydrochloric acid solution (7.10.3.1); shake the mixture well. ADD 5.00mL of barium
chloride solution (7.10.3.2) to 2 tubes respectively; shake them well. PUT them in a
dark place for 10min. TAKE them out for visual colorimetry.
If the turbidity of the sample tube solution is not higher than that of the standard tube
solution, the sulfate content is ≤0.05%.
7.10.4.2 Salted monosodium L-glutamate
WEIGH 0.5g of samples into a 50mL colorimetric tube, accurate to 0.01g. ADD 18mL
of water to dissolve them; then add 2mL of hydrochloric acid solution (7.10.3.1).
SHAKE the mixture well. SUCK accurately 2.50mL of sulfate standard solution I
(7.10.3.3) INTO another 50mL colorimetric tube. ADD 15.5mL of water and 2mL of
hydrochloric acid solution (7.10.3.1); shake the mixture well. ADD 5.00mL of barium
chloride solution (7.10.3.2) to 2 tubes respectively; shake them well. PUT them in a
dark place for 10min. TAKE them out for visual colorimetry.
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.
8.4.2.2 Salted monosodium L-glutamate. package, net content, content of
monosodium L-glutamate, edible salt, light transmittance, loss on drying, ferrum,
sulfate.
8.4.2.3 Special delicious monosodium L-glutamate. package, net content, content of
monosodium L-glutamate, light transmittance, content of sodium ribonucleotide, 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.
a) Major changes in raw and auxiliary materials;
b) Change of key processes or equipment;
c) Restoration to production after 3-month production halt of new
trial-manufactured products or normally manufactured products;
d) Occurrence of major differences in the inspection results between the factory
inspection and the previous type inspection;
e) Spot test by national quality supervision and inspection agency according to
relevant regulations.
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.
8.6.2 If there is dispute between the seller and the buyer over the quality, both parties
shall negotiate to choose an arbitration agency to do re-inspection according to this
Standard.
9 Marking, packaging, transportation, and storage
9.1 Marking
9.1.1 The outer packing marks of products shall comply with GB/T 191.
9.1.2 The outer packaging material shall have obvious marks, which shall indicate
product name, manufacturer, address of manufacturer, net content, date of production
(batch number), and etc.
9.1.3 The package of prepackaged products shall be marked according to GB7718.
The package of salted monosodium L-glutamate shall be marked with the specific
content of monosodium L-glutamate.
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.
A.3.1 L-glutamic acid content
A.3.1.1 Polarimetry
A.3.1.1 Principle
Similar to 7.3.2.1.
A.3.1.1.2 Instruments
Similar to 7.3.2.2.
A.3.1.1.3 Reagents
Similar to 7.3.2.3.
A.3.1.1.4 Analysis procedures
a) Preparation of sample solution. WEIGH 10g of samples, accurate to 0.0001g.
ADD 20mL of water. Add 16.5mL of hydrochloric acid while stirring. MOVE it into
a 100mL volumetric flask when the samples are completely dissolved. COOL
down the solution to about 20°C. DILUTE it to a constant volume and mix it well.
FILTER it with filter paper.
If the solution color is dark, add 0.1g (0.3g at most) of activated carbon. STIR,
decolor, and filter it. DISCARD the first 5mL of filtrate and collect the rest filtrate
for later use.
b) Determination. similar to 7.3.2.4.
A.3.1.1.5 Calculation
The content of L-glutamic acid in the sample is calculated according to formula (A.1),
expressed in %.
Where.
XA1 - the content of L-glutamic acid in the sample, in %;
α - the measured optical rotation of the solution, in °;
L - the length of polarization tube (that is liquid layer thickness), in dm;
c - the content of L-glutamic acid in 1mL samples, in g/mL;
32.00 - the specific rotation, in °;
0.06 - temperature correction factor.
The computing result shall be rounded off to the first decimal.
A.3.2.3 Tolerance
The difference of the absolute values of two times of determination for the same
sample shall not exceed 0.02%.
A.3.3 Light transmittance
A.3.3.1 Instruments
Spectrophotometer. accuracy of ±0.5%.
A.3.3.2 Reagents
a) Hydrochloric acid;
b) Hydrochloric acid solution [c(HCl)=2 mol/L]. measure 16.5mL of hydrochloric
acid [A.3.3.2a]; inject it into 100mL of water; shake them well.
A.3.3.3 Analysis Procedures
WEIGH 5g of samples, accurate to 0.1g. DISSOLVE them in hydrochloric acid
solution [A.3.3.2b]; dilute to 100mL. SHAKE the mixture well to be as test solution.
WASH the cuvette with the test solution. USE 1cm cuvette TO ADJUST zero with the
same batch of hydrochloric acid solution [A.3.3.2b]. DETERMINE the light
transmittance at 590nm wavelength.
A.3.3.4 Tolerance
Similar to 7.4.3.
A.3.4 Sulfate
A.3.4.1 Principle
Similar to 7.10.1.
A.3.4.2 Reagents and solutions
Similar to 7.10.3.
A.3.4.3 Analysis procedures
TAKE 1.00ml of test solution [A.3.1.1.4a]. ADD 17mL of water and 2mL of hydrochloric
acid [10% (volume fraction)], as the sample tube. TAKE 3.50mL of standard sulfate
solution. ADD 14.5mL of water and 2mL of hydrochloric acid [10% (volume fraction)],
TAKE little samples (about 0.5g). ADD 1mL of hydrochloric acid (B.2.a) to dissolve
them. DIP the pointed end of the platinum needle into the test solution for about 5mm.
Then put the platinum needle in the colorless or blue flame of the Bunsen burner to
burn.
If there is yellow flame and it lasts about 4s, it can be identified as sodium salt.