Some standard content:
Classification No. Y43
Registration No. 995—1998
Light Industry Standard of the People's Republic of China
QB/T2344—97
Amphoteric Surfactants
Fatty Alkyl Dimethyl Betaine
1998 — 01 — 16 Issued by China Light Industry General Association
199809-01 Implementation
QB/T2344-97
This standard determines the technical requirements of fatty alkyl dimethyl betaine with reference to the quality specifications of the corresponding products of some foreign companies such as Albrieht & Witson of the United Kingdom and Hoechst of Germany. This standard is proposed by the Quality Standards Department of China Light Industry General Association. This standard is under the jurisdiction of the National Surfactant Cleaning Products Standardization Center. This standard is drafted by the China Daily Chemical Industry Research Institute. The main drafter of this standard: Zhang Wenzhuo.
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1 Scope
North Standard of the Light Industry of the People's Republic of China
Amphoteric Surfactants
Fatty Alkyl Dimethyl Betaine
QB/T 2344 97
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements for fatty alkyl dimethyl betaine.
This standard applies to fatty alkyl dimethyl betaine. CHs
Structural formula: R-~N
2 Referenced standards
(R-C-main component)
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the use of the latest versions of the following standards Possibility.
GB601-88 Preparation of standard solution for titration analysis (volume analysis) of chemical reagents GB6368-93 Determination of pH value of aqueous surfactant solution Potentiometric method QB/T2345-97 Determination of average relative molecular mass of fatty alkyl dimethyl betaine Gas-liquid chromatography 3 Technical requirements
The physical and chemical indicators of fatty alkyl dimethyl betaine should comply with the requirements of Table 1. Table 1 Physical and chemical indicators of fatty alkyl dimethyl betaine Item
Active matter content
Unreacted amine content
Chemical content
4 Test method
(5 % solution, 25 ℃)
Colorless to light yellow transparent viscous liquid
30 ±2
Analysis grade reagents, distilled water or water of equivalent purity should be used in the analysis. Approved by China Light Industry Federation on January 16, 1998I
Implementation on September 1, 1998
4.1 Appearance
QB/T 2344 - 97
Pour the sample into a 50mL beaker to two-thirds of the volume and inspect visually. 4.2 Determination of active matter content
4.2.1 Principle
Use n-butanol to extract and separate the active matter and unreacted amine. Perform potentiometric titration with perchloric acid standard solution in acetic acid solution to remove unreacted amine and obtain the amount of active matter.
4.2.2 Reagents
a) n-Butyl alcohol (GB12590):
b) Methanol (GB 683):
) ZnO2 (GB 676)
d) Perchloric acid (GB623), C(HCIO4)-0.2mo/L standard solution, prepared and calibrated according to the provisions of GB601. 4.2.3 Instruments
Ordinary laboratory instruments and
a) Acidity meter, graduation not greater than 0.02 pH, equipped with glass electrode (such as type 231) and Gamma-ray electrode [such as type 232) and potentiometric titration:
b) Electromagnetic stirrer:
) Closed electric furnace, equipped with voltage regulator:
d) Separating funnel, 250mL:
e) Volumetric flask, 100mL3
f) Pipette, 20mL;
g) Commercial beaker, 150mL:
h) Measuring cylinder, 50mL:
i) Semi-micro burette, 10mL.
4.2.4 Test procedure
Use the reduction method to weigh 5~10g of homogenized sample (accurate to 1mg) into a separatory funnel (4.2.3d), add 50mL of water to dissolve the sample, and add 40mL of n-butanol (4.2.2a). Stopper the funnel and shake vigorously for at least 158, let stand to separate. Place the lower layer into the second separatory funnel and add 25mL of n-butanol to the second separatory funnel. Shake vigorously, let stand to separate, discard the lower layer and combine the n-butanol extracts into a dry 100mL volumetric flask (4.2.3e), rinse each separatory funnel with a small amount of methanol (4.2.2b), and combine them into the volumetric flask (4.2.3e), then dilute to the mark with n-butanol and shake well. Use a pipette (4.2.3f) to transfer 20 mL of n-butanol extract to a 150 mL beaker (4.2.3g), and adjust the low temperature on a closed electric furnace (4.2.3c) to drive out the solvent until about 3 mL of liquid remains. Cool, add 60mL acetic acid (4.2.2c): Place the beaker on the electromagnetic stirrer (4.2.3b), perform potentiometric titration with the perchloric acid standard solution (4.2.2d), draw a titration curve, take the maximum jump of the potential value as the titration end point, and record the corresponding volume secret (. 4.2.5 Calculation of test results
The active substance content (X) of fatty alkyl dimethyl betaine is expressed as mass percentage and calculated according to formula (1): X =
Wherein: c, —- concentration of perchloric acid standard solution, mol/L — volume of perchloric acid standard solution consumed, mLMB
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QBT 2344 -- 97
m—mass of the sample, g:
cConcentration of the hydrochloric acid standard solution used in the determination of unreacted amine (4.3), moVL:VVVvolume of the hydrochloric acid standard solution consumed in the determination of unreacted amine (4.3), mL:mThe mass of the sample used in the determination of unreacted amine (4.3), g;M—molar mass of fatty alkyl dimethyl betaine, /mal. Ms value is measured according to 0B/T2345.
Take the average value of two parallel measurements as the result, and the value is retained to the unit place. 4.2.6 Precision
The difference between the results of two parallel measurements should not exceed 1.0%. 4.3 Determination of unreacted amine content
4.3.1 Principle
The unreacted amines in the sample include unreacted fatty alkyl dimethyl amine and tertiary amine combined with hydrochloric acid. Under alkaline conditions , the hydrochloride of tertiary amine decomposes and converts to fatty alkyl trimethylamine, which is separated by extraction with petroleum ether. The two parts of fatty alkyl dimethylamine are titrated with hydrochloric acid standard solution. Calculate its content. 4,3.2 Reagents
a) Methanol (GB683);
b) Methanol aqueous solution, methanol: water = 1:1 (V/V);) Neutral methanol, indicated by bromocresol green indicator 4.3.2g), adjusted with hydrochloric acid standard push solution (4.3.21) or sodium hydroxide solution (4.3.2i) until the liquid color changes from light blue to light yellow: d) Petroleum acyl (HG3-1003), boiling range 30～60C; e) Sodium hydroxide (GB629), 10molL aqueous solution: f) Phenol acyl (GB10729), 10L ethanol solution g) Bromocresol green (HG3-1220): 1LZ alcohol solution: h ） Hydrochloric acid (GB 622), c (HCI) = 0.1 mol/L Standard solution 1) Sodium hydroxide (GB629), 0.1 mol/L solution. 4.3.3 Instruments
Ordinary laboratory instruments and
a) Separatory funnel, 250ml;
b) Tall beaker, 150mL:
c) Volumetric slurry, 50:
d) Jurgen burette, 25mL;
e) Closed electric furnace, equipped with a voltage regulator.
4.3.4 Test procedure
Use the reduction method to weigh 15g of sample (accurate to 0.01g) into a separatory funnel (4.3.3a), add 40mL of water and 50mL of methanol (4.3.2a) to dissolve the sample, add catechol (4.3.2f), neutralize with sodium hydroxide solution (4.3.2e) until it turns red and add 1mL in excess. Add 50mL of petroleum ether (4.3.2d) to the separatory funnel, plug the stopper, shake vigorously, and let stand to separate. Put the lower layer into the second separatory funnel, add 50mL of petroleum ether, shake, and let stand to separate. Discard the lower layer, combine the extracts, and wash the extracts with 25mL of methanol-water solution (4.3.2b) each time until the washing liquid does not turn red due to phenolic acid. Discard the washing liquid. Place the petroleum ether layer in a dry 150 mL beaker (4.3.3b) and set the temperature on a closed electric furnace (4.3.3e) to drive out the solvent.Until about 5 mL of liquid remains. Add 30 mL of neutral methanol (4.3.2c) and a few drops of cresol green indicator to the beaker, and titrate with hydrochloric acid 3
QB/T2344-97
standard solution (4.3.2h) under electromagnetic stirring until the color of the solution changes from blue to green to light yellow. 4.3.5 Calculation of test results
The mass percentage of unreacted amine in the sample (X2) is calculated as fatty alkyl dimethyl tertiary amine according to formula (2): X, =
Where: °C---concentration of hydrochloric acid standard solution, mol/L:--volume of salt standard solution consumed, mL:
M-molar mass of fatty alkyl dimethyl amine, g/mol; m-mass of sample, g.
M, value is the average molecular mass of fatty alkyl dimethyl amine measured according to OB/T2345. Take the average of two parallel determinations as the result, and express the value to one decimal place. 4.3.6 Precision
The difference between the results of two parallel determinations shall not exceed 0.2% of the reactive amine content. 4.4 Determination of sodium oxide content
4.4.1 Principlewww.bzxz.net
Under neutral pH conditions, use potassium chromate as an indicator and titrate with silver nitrate standard solution. Calculate the sodium oxide content. 4.4.2 Reagents
a) Nitric acid (GB 670) (AgNO) = 0.1 to LL standard solution; b) Potassium chromate (HG3-9]8), 50 g/L aqueous solution. 4.4.3 Apparatus
Ordinary laboratory apparatus and
a) Conical flask, 150 mL;
b) Burette with brown stopper, 25 mL
4.4.4 Test procedure
Weigh 1 mg of sample (accurate to 0.1 mg) into a conical flask (4.4.3 a), add 40 mL of water to dissolve. Add 1 mL of potassium chromate indicator (4.4.2 b), and titrate with silver nitrate standard solution (4.4.28) until the solution turns brick red. 4.4.5 Calculation of test results
The content of sodium nitride (X) is expressed as mass percentage and calculated according to formula (3): X, = -
Where: c-concentration of silver nitrate standard solution, mol/LV-volume of silver nitrate standard solution consumed, mLm-mass of sample, g:
58.4 Molar mass of sodium chloride, g/mol
Take the average value of two parallel determinations as the result, and keep one decimal place. 4.4.6 Precision
The difference between the results of two parallel determinations of nitride content should not exceed 0.5% 4.5 pH value
Prepare a 5% sample aqueous solution. Determine according to GB6368. 5 Inspection rules
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5.1 Batch and sampling rules
QB/T2344→97
Products are delivered in batches, and the products produced from the same batch of raw materials are delivered in batches. Products must be inspected and qualified by the quality inspection department of the manufacturer in accordance with this standard, and a quality certificate shall be issued. The receiving department shall accept the goods in accordance with this standard based on the quality certificate. 5.2 Sampling
For delivery and acceptance sampling, the delivery and receiving parties shall determine the sample size according to Table 2 and randomly draw and insert samples from the batch. Table 2 Batch (number of barrels) and sample size
Batch (number of barrels)
Sample size
2 ~ 15
16 ～~ 50
51 ～150
151 ~～500
Use the sampling tube to insert into the bottom of each sample barrel to take samples throughout the process, and take equal amounts of samples and put them into the sample bottles. The total amount shall not be less than 1.5kg. Mix them evenly and divide them into three clean and dry stoppered sample bottles, and label them. Mark: sample name, specification, batch number, manufacturer name, sampling date and sampler. The delivery parties hold one bottle for inspection, and the third bottle is kept by the delivery party for arbitration inspection.
5.3 Judgment rules and re-inspection
The physical and chemical index test results are judged as qualified or unqualified by the rounded value comparison method. If one item is unqualified, the two parties may re-sample from the double-volume sample unit and re-test the unqualified item. If the re-test result still does not meet the requirements of this standard, the product shall be judged unqualified. If the two parties to the delivery still have disputes over the re-test results, they may request arbitration, and the arbitration result shall be the final basis. 6 Marking, packaging, transportation, storage
6.1 The following marks shall be on the outer wall of each fatty alkyl dimethyl betaine packaging barrel or the attached quality certificate: a) product name, trademark and implemented standards; b) net weight;
c) production date, batch number:
d) manufacturer's name and address.
6.2 The product can be packaged in plastic barrels or plastic-coated iron barrels that do not affect the quality of the product. The barrel cover should be sealed and leak-free. The net content of the package should meet the nominal weight.
6.3 During transportation, it should be loaded and unloaded gently to avoid impact and damage to the package. 6.4 Avoid stacking in the open air during storage, prevent staleness and sun exposure. 5
People's Republic of China
Light Industry Industry Standard
Amphoteric Surfactants
Fatty Alkyl Dimethyl Betaine
QB/T 2344 - 97
Light Industry Standardization Editorial and Publishing Committee
Address: No. 12, Guanghua Road, Chaowai, Beijing
Postal Code: 100020
Tel: (010)
65060022-2309
Internal Information
No Reprinting Allowed
Print Quantity: 1-200 Copies
Price: 5.00 Yuan
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26 - 102 Sampling
For delivery acceptance sampling, the delivery and receiving parties shall determine the sample size according to Table 2, and randomly drag and insert samples from the batch. Table 2 Batch (number of barrels) and sample size
Batch (number of barrels)
Sample size
2 ~ 15
16 ～~ 50
51 ～150
151 ~～500
Use the sampling tube to insert the sampling tube to the bottom of each sample barrel for sampling, and extract equal amounts of samples and put them into the sample bottle. The total amount shall not be less than 1.5kg. Mix them evenly and divide them into three clean and dry stoppered sample bottles, and label them. Mark clearly: sample name, specification, batch number, manufacturer name, sampling date and sampler. The delivery and receiving parties shall hold one bottle for inspection, and the third bottle shall be kept by the delivery party for arbitration inspection.
5.3 Judgment rules and re-inspection
The physical and chemical index test results are used to determine whether the product is qualified or unqualified by the rounded value comparison method. If one item is unqualified, the two parties can re-sample from the double-volume sample unit and re-inspect the unqualified item. If the re-inspection result still does not meet the requirements of this standard, the product shall be judged unqualified. If the delivery parties still have disputes over the re-inspection results, they can ask for arbitration, and the arbitration result shall be the final basis. 6 Marking, packaging, transportation, storage
6.1 The outer wall of each fatty alkyl dimethyl betaine packaging barrel or the attached quality certificate shall have the following marks: a) product name, trademark and implemented standard; b) net weight;
c) production date, batch number:
d) manufacturer's name and address.
6.2 The product can be packaged in plastic barrels or plastic-coated iron barrels that do not affect the quality of the product. The barrel cover should be sealed and leak-free. The net content of the package should meet the nominal quality.
6.3 During transportation, the products should be loaded and unloaded with care to avoid impact and damage to the packaging. 6.4 During storage, the products should be stored in an exposed manner to prevent staleness and sun exposure. 5
People's Republic of China
Light Industry Industry Standard
Amphoteric Surfactants
Fatty Alkyl Dimethyl Betaine
QB/T 2344 - 97
Light Industry Standardization Editorial and Publishing Committee
Address: No. 12, Guanghua Road, Chaowai, Beijing
Postal Code: 100020
Tel: (010)
65060022-2309
Internal Information
No Reproduction
Print Quantity: 1-200 Copies
Price: 5.00 Yuan
KAONKAca=
26 - 102 Sampling
For delivery acceptance sampling, the delivery and receiving parties shall determine the sample size according to Table 2, and randomly drag and insert samples from the batch. Table 2 Batch (number of barrels) and sample size
Batch (number of barrels)
Sample size
2 ~ 15
16 ～~ 50
51 ～150
151 ~～500
Use the sampling tube to insert the sampling tube to the bottom of each sample barrel for sampling, and extract equal amounts of samples and put them into the sample bottle. The total amount shall not be less than 1.5kg. Mix them evenly and divide them into three clean and dry stoppered sample bottles, and label them. Mark clearly: sample name, specification, batch number, manufacturer name, sampling date and sampler. The delivery and receiving parties shall hold one bottle for inspection, and the third bottle shall be kept by the delivery party for arbitration inspection.
5.3 Judgment rules and re-inspection
The physical and chemical index test results are used to determine whether the product is qualified or unqualified by the rounded value comparison method. If one item is unqualified, the two parties can re-sample from the double-volume sample unit and re-inspect the unqualified item. If the re-inspection result still does not meet the requirements of this standard, the product shall be judged unqualified. If the delivery parties still have disputes over the re-inspection results, they can ask for arbitration, and the arbitration result shall be the final basis. 6 Marking, packaging, transportation, storage
6.1 The outer wall of each fatty alkyl dimethyl betaine packaging barrel or the attached quality certificate shall have the following marks: a) product name, trademark and implemented standard; b) net weight;
c) production date, batch number:
d) manufacturer's name and address.
6.2 The product can be packaged in plastic barrels or plastic-coated iron barrels that do not affect the quality of the product. The barrel cover should be sealed and leak-free. The net content of the package should meet the nominal quality.
6.3 During transportation, the products should be loaded and unloaded with care to avoid impact and damage to the packaging. 6.4 During storage, the products should be stored in an exposed manner to prevent staleness and sun exposure. 5
People's Republic of China
Light Industry Industry Standard
Amphoteric Surfactants
Fatty Alkyl Dimethyl Betaine
QB/T 2344 - 97
Light Industry Standardization Editorial and Publishing Committee
Address: No. 12, Guanghua Road, Chaowai, Beijing
Postal Code: 100020
Tel: (010)
65060022-2309
Internal Information
No Reproduction
Print Quantity: 1-200 Copies
Price: 5.00 Yuan
KAONKAca=
26 - 10
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