HG/T 2230-1991 Water treatment agent dodecyl dimethyl benzyl ammonium chloride
Some standard content:
Chemical Industry Standard of the People's Republic of China
Dodecyldimethylammonium chloride
Water treatment agent
Subject content and scope of application
HG 2230 --91
This standard specifies the technical requirements, test methods, inspection rules, and marking, packaging, transportation, storage, and safety requirements for dodecyldimethylammonium chloride products.
This standard applies to dodecyldimethylammonium chloride synthesized from dodecyldimethylamine and chlorinated extract. This product is used as a bactericidal algaecide in industrial circulating cooling water treatment. Structural formula:
［C12H25-
Molecular formula: C2HaNCI
Relative molecular mass: 340.00 (1985 international relative molecular mass) 2 Reference standards
Packaging, storage and transportation pictorial symbols
Chemical reagents
Chemical reagents
Chemical reagents
GB3143
GB6678
3 Technical requirements
Preparation of standard solutions for titration analysis (volume analysis) Preparation of standard solutions for impurity determination
Preparation of preparations and products used in the test method Color determination method for liquid chemical products
General rules for sampling of chemical products
3.1 Appearance: colorless or light yellow viscous and transparent liquid, without precipitation. Dodecyl dimethyl cyanoammonium fluoride shall meet the requirements of Table 1: 3.2
Active matter content %
Ammonium salt content, %
Color (iazen)
Test method
Superior product
4 season 46
No. 100
No. 200
Qualified device
No. 500
In the analysis method, unless otherwise specified, only analytical reagents and distilled water or water of equivalent purity shall be used; the reference material shall adopt the reference test. Approved by the Ministry of Chemical Industry of the People's Republic of China on November 15, 1991, 120
Implementation on July 1, 1992
HG2230-91
The standard solutions and preparations required in the test shall be prepared in accordance with the provisions of GB601, GB602 and GB603 unless otherwise specified. 4.1 Determination of active matter content
4.1.1 Summary of the method
Dodecyldimethylammonium chloride is a quaternary ammonium salt cationic surfactant that can form a complex with dichlorofluorescein yellow. When titrated with sodium tetraphenylborate solution, dichlorofluorescein yellow is displaced from the chelate to form a bright red complex. When the endpoint is reached, the excess sodium tetraphenylborate reacts with the indicator, and the complex in the solution changes from bright red to yellow. The active matter content in the sample is calculated from the consumption of sodium tetraphenylborate. The reaction formula is:Www.bzxZ.net
(C2H2)(CH)（CH,CH2)N+CI-+(CH),BNa(Ci2H25)(CH.)2(CH,CHaNB(C,H,)4 +NaCl4.1.2 Reagents and materials
4. 1.2.1 Sodium tetraphenylborate (HG 31164);4.1.2.2 Bear sugar (HG3-1001);
4.1.2.3 Fluorofluorescent yellow: 10g/1. ethanol solution;4.1.2.4, Potassium tetraphenylborate test solution: weigh 0.1g potassium hydrogen phthalate (GB1291), add 50ml water. Dissolve. Add 1.0ml glacial acetic acid (GB676). Add 15mL of unstandardized sodium tetraphenylborate solution (4.1.2.5) to this solution , stir evenly, let stand for 1 hour, and filter. Wash the resulting precipitate with water, take half of the precipitate, add 100mL of water, keep constant temperature at 50°C in a water bath, stir at the same time, then cool rapidly, let stand for 2 hours after cooling to room temperature, and filter. Discard the initial filtrate 30mL, and use the remaining filtrate for later use. Valid for three months. 4.1.2.5 Sodium tetraphenylborate standard titration solution: cE(C,Hs),BNa)=0.02mol/L. Preparation: Weigh about 7g of sodium tetraphenylborate (4.1.2.1), accurate to 0.01g. Add 50mL of water, heat slightly to help dissolution, add 0.5g of aluminum nitrate (HG3-928), shake for 5min, add 250mL of water, and then add 16.6g of sodium chloride (GB1266), let stand for 30min after dissolution, filter with double-layer quantitative medium-speed filter paper, add 600mL of water, adjust the pH value to 8~9 with sodium oxychloride (GB629), add water to 1000ml, filter, and place the solution in a brown bottle for later use. Valid for six months.
Calibration: Weigh 0.5g of potassium hydrogen phthalate (GB1291) at a constant weight at 105-110°C, accurate to 0.0002g, add 100mL of water to dissolve, add 2.0ml of glacial acetic acid (GB676), heat to 50°C in a water bath, slowly add 50.00mL of the uncalibrated sodium phenylborate solution (4.1.2.5) from the burette, then cool rapidly while stirring, place at room temperature for 11, filter with a No. 4 filter (4.1.3.4) that has been weighed to a constant weight, wash the filter residue with potassium tetraphenylborate test solution (4.1.2.4) 3 times, 5mL each time, and dry the filter residue in a drying oven at 105°C to constant weight.
Calculation:
Where: actual concentration of sodium tetraphenylborate standard titration solution, mol/, volume of sodium tetraphenylborate standard titration solution, mL.; m mass of filter residue,
0.3583 mass of potassium tetraphenylborate expressed in grams equivalent to 1.00mL sodium tetraphenylborate standard titration solution Cc(C.Hs)BNa1.000mol/L.
The result should be expressed to four decimal places.
4.1.3 Instruments and equipment
4.1.3.1 Magnetic water bath, 37C-100C. Water temperature fluctuation is 1℃, 4.1.3.2 Drying oven, temperature controller sensitivity ±1C; 4.1.3.3 Vacuum pump;
4.1.3.4 G~4 type filter.
4.1.4 Analysis steps
4.1.4.1 Preparation of sample solution:
HG2230-91
Weigh about 8 tbsp of alkyl dimethyl benzyl ammonium chloride sample, accurate to 0.001g, place in a 1000mL volumetric flask, add water to 1000mlL, shake well for use. The validity period is one week. 4.1.4.2 Determination: Use a pipette to transfer 25mL of sample solution (4.1.4.1) into a 150mL conical flask, add 5g of sucrose (4.1.2.2), heat slightly to help dissolution, cool to room temperature, add 23 drops of fluorescent yellow indicator (4.1.2.3), and titrate with tetraphenyl sodium standard titration solution (4.1.2.5) until the precipitate in the solution changes from bright red to yellow, which is the end point. The titration speed should be slow when approaching the end point. 4.1.5 Expression of analysis results
Express the active content X' in mass percentage, calculated according to formula (1): X' =: VX0. 340 0
Where: --- Actual concentration of sodium tetraphenylborate standard titration solution mol/L; Volume of sodium tetraphenylborate standard titration solution, mL: X100
m- Mass of sample, g,
0.3400-- Mass of dodecyl dimethyl ammonium chloride in grams equivalent to 1.00ml sodium tetraphenylborate standard titration solution Cc(C.Hs), BNa1.000mol/L.
The obtained result should be expressed to one decimal place.
4.1.6 Allowable difference
Take the arithmetic mean of parallel determinations as the determination result: The absolute difference between the two results of parallel determinations shall not exceed 1%, and the absolute difference between the results of different laboratories shall not exceed 2.5%.
4.2 Determination of ammonium salt content
4.2.1 Method summary
Since the ammonium salt in the sample exists in the form of dodecaned tertiary amine acetate or dodecaned tertiary amine hydrochloride and is acidic, it can be titrated with sodium hydroxide standard titration solution based on the principle of acid-base titration. 4.2.2 Reagents and materials
4.2.2.1 Isopropyl alcohol (HG3-1167);
4.2.2.2 Sodium hydroxide (GB 629) standard titration solution: c(NaOH)=0.05mol/L;4.2.2.3 Phenolic acid indicator: 10g/L ethanol solution. 4.2.3 Analysis steps
Weigh about 3 milliliters of dodecanedimethyl ammonium fluoride sample, accurate to 0.0002 g, in a 150 mL conical flask, add 30 ml of isopropanol (1.2.2.1) to dissolve it, and add 3 to 4 drops of phenol indicator (4.2.2.3). Titrate with sodium hydroxide standard titration solution (4.2.2.2) until the color turns pink. The end point is when the color does not change after 30 seconds. 4.2.4 Expression of analysis results
The ammonium salt content X2 expressed as mass percentage is calculated according to formula (2): Xxmc:VX0.2734×100
27.34Xc.V
Where: (actual concentration of sodium hydroxide standard titration solution, mol/L; V volume of sodium oxychloride standard titration solution, mL, m mass of sample, gram;
0.2734 mass of dodecanedrine acetate equivalent to 1.00ml. sodium hydroxide standard titration solution [c (NaOH) 1.000mol/1., expressed in grams.
The result should be expressed to one decimal place.
4.2.5 Tolerance
HG 2230—91
Take the arithmetic mean of the parallel determinations as the determination result; the absolute difference between the two parallel determination results shall not exceed 0.2%; the absolute difference between the laboratory determination results shall not exceed 0.3%. 4.3 Determination of color
4.3.1 Method summary
The color of the sample is visually compared with the color of the standard platinum-cobalt colorimetric solution, and the result is expressed in Hazen (platinum-cobalt) color units. Hazen (platinum-cobalt) color units are: the color of a solution containing 1 mg of platinum (calculated as chloroplatinic acid) and 2 mg of cobalt chloride hexahydrate per liter of solution. 4.3.2 Reagents and materials
4.3.2.1 Cobalt chloride hexahydrate (CoCl2·6H2O); 4.3.2.2 Potassium chloroplatinate (KPtCl.);
4.3.2.3 Standard colorimetric solution (500 Hazen units): Preparation: Add 1.00g of cobalt chloride hexahydrate (4.3.2.1) and 1.245g of potassium chloroplatinate (4.3.2.2) to a 1000mL brown volumetric flask, dissolve in water, add 100ml of hydrochloric acid (GB622) solution, add water to the scale, and mix well. Seal and store, valid for six months. Test: Test with a 1cm absorption cell at the following wavelengths. Wavelength, nm
4.3.2.4 Preparation of standard platinum-cobalt colorimetric solution Absorbance
0.110~0.120
0.130~~0.145
0. 105~~0. 120
0.055～0.065
In: 10 250ml volumetric flasks, add the following volume of standard colorimetric mother solution (4.3.2.3), add water to the mark, and mix. Standard colorimetric mother solution, ml
4.3.3 Instruments and equipment
4.3.3.1 Spectrophotometer: with 1cm absorption cell; 4.3.3.2 Colorimetric tube: 50ml.
Hazen unit
4.3.4 Analysis steps
In: a 50ml l. Inject the sample into the colorimetric tube to the scale, and inject the standard platinum-cobalt colorimetric solution (4.3.2.5) with a color similar to the sample into another 50mL colorimetric tube to the scale. Under sunlight or fluorescent light, observe from top to bottom against a white background, and compare the color of the sample with that of the standard platinum-cobalt colorimetric solution. Avoid observing from the side. 123
4.3.5 Expression of analysis results
HG2230-91
The color of the sample is expressed in Hazen (platinum-cobalt) color units of the standard platinum-cobalt colorimetric solution that is closest to the sample. 4.4 Determination of pH value
4.4.1 Instruments and equipment
4.4.1.1 Acidity meter: The graduation value is 0.02 pH unit, equipped with a glass electrode and a saturated calomel electrode. 4.4.2 Analysis steps
Place the sample in a beaker and stir it evenly. Place the calomel electrode and glass electrode into the sample to be tested and measure the pH value of the sample on the positioned acidometer.
The difference between the results of two parallel determinations shall not exceed 0.2 pH units. Take the arithmetic mean as the determination result. 5 Inspection rules
5.1 Dodecyl dimethylphenyl ammonium chloride shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all products leaving the factory meet the requirements of this standard. Each batch of products leaving the factory shall be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that the product quality meets this standard and standard number. 5.2 The manufacturer has the right to inspect and accept the received dodecyl dimethylphenyl ammonium chloride products in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 2t.
5.4 Determine the number of sampling units in accordance with Article 6.6 of GB6678. When sampling, use a glass tube or plastic tube to insert into the barrel at a depth of 5/6 to take out the sample. The sample taken out of each barrel shall not be less than 200g. Put them into two clean and dry bottles respectively, seal the bottle mouths, and label the bottles with the manufacturer name, product name, batch number, sampling date, and sampler. One bottle is used for inspection, and the other bottle is used as a reserved sample for inspection. The retention period is six months.
5.5 If one of the inspection results does not meet the requirements of this standard, the sample should be re-drawn from the barrel with the added number and inspected again. If one of the inspection results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.6 When the supply and demand parties have objections to the product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration Inspection". 6 Marking, packaging, transportation and storage
6.1 Each barrel should be attached with a product certificate, and the barrel should have a firm and clear label on the outside, including: product name, manufacturer name, grade, net weight, batch number, production date, trademark, this standard number, and painted with upward and heat-resistant marks in accordance with GB191. 6.2 The product is packed in a plastic barrel with a net weight of 50kg, or an iron barrel with a plastic spray inside with a net weight of 200kg. For long-distance transportation, if outer packaging is required, the supply and demand parties shall negotiate separately.
6.3 During handling and transportation, it should be placed carefully and gently according to the effective direction. It is strictly forbidden to hit it to avoid leakage. 6.4 It should be kept ventilated during storage and not exposed to the sun. The storage period is two years. 7 Safety requirements
Alkyl methyl ammonium chloride products are corrosive and irritating to a certain extent. Operators should wear protective equipment when performing operations to avoid direct contact.
Additional Notes:
This standard was proposed by the Department of Science and Technology of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Research Institute of the Ministry of Chemical Industry. This standard was drafted by Tianjin Chemical Research Institute of the Ministry of Chemical Industry and Shanghai Synthetic Detergent Sanguang. The main drafters of this standard are Shao Jiren, Zhang Shuchun, Yin Kegang, Zhang Yanli and Hu Banfa. 1245) to the scale. Under sunlight or fluorescent light, facing a white background, observe from top to bottom, and compare the color of the sample with the color of the standard platinum-cobalt colorimetric solution, avoiding side observation. 123
4.3.5 Expression of analysis results
HG2230-91
The color of the sample is expressed in the Hazen (platinum-cobalt) color unit of the standard platinum-cobalt colorimetric solution closest to the sample. 4.4 Determination of pH value
4.4.1 Instruments and equipment
4.4.1.1 Acidometer: The graduation value is 0.02 pH unit, equipped with a glass electrode and a saturated calomel electrode. 4.4.2 Analysis steps
Put the sample in a beaker, stir it evenly, diffuse the calomel electrode and the glass electrode into the sample to be tested, and measure the pH value of the sample on the positioned acidometer.
The difference between the results of two parallel determinations is not greater than 0.2 pH units, and the arithmetic mean is taken as the determination result. 5 Inspection rules
5.1 Dodecyl dimethyl phenyl ammonium chloride shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all products leaving the factory meet the requirements of this standard. Each batch of products leaving the factory shall be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that the product quality meets this standard and standard number. 5.2 The unit has the right to inspect and accept the received dodecyl dimethyl phenyl ammonium chloride products in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 2t.
5.4 Determine the number of sampling units in accordance with Article 6.6 of GB6678. When sampling, use a glass tube or plastic tube to insert into the barrel at a depth of 5/6 to take out the sample. The sample taken out of each barrel shall not be less than 200g. Put them into two clean and dry bottles respectively, seal the bottle mouths, and label the bottles with the manufacturer name, product name, batch number, sampling date, and sampler. One bottle is used for inspection, and the other bottle is used as a reserved sample for inspection. The retention period is six months.
5.5 If one of the inspection results does not meet the requirements of this standard, a new sample should be taken from the barrel with the added number and inspected again. If one of the inspection results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.6 When the supply and demand parties have objections to the product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration Inspection". 6 Marking, packaging, transportation and storage
6.1 Each barrel should be accompanied by a product certificate, and the outside of the barrel should have a firm and clear label, including: product name, manufacturer name, grade, net weight, batch number, production date, trademark, this standard number, and painted with upward and heat-resistant marks in accordance with GB191. 6.2 The product is packed in a plastic barrel with a net weight of 50kg, or an iron barrel with a plastic spray inside, with a net weight of 200kg. For long-distance transportation, if outer packaging is required, the supply and demand parties shall negotiate separately.
6.3 During handling and transportation, the product should be placed carefully and gently in the direction of effect. Impact is strictly prohibited to avoid leakage. 6.4 During storage, ventilation should be maintained and exposure to sunlight should be avoided. The storage period is two years. 7 Safety requirements
Alkyl methyl ammonium chloride products are corrosive and irritating to a certain extent. Operators should wear protective equipment during operations to avoid direct contact.
Additional instructions:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Tianjin Chemical Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Tianjin Chemical Research Institute of the Ministry of Chemical Industry and Shanghai Synthetic Detergent Sanguan. The main drafters of this standard are Shao Jiren, Zhang Shuchun, Yin Kegang, Zhang Yanli, and Hu Banfa. 1245) to the scale. Under sunlight or fluorescent light, facing a white background, observe from top to bottom, and compare the color of the sample with the color of the standard platinum-cobalt colorimetric solution, avoiding side observation. 123
4.3.5 Expression of analysis results
HG2230-91
The color of the sample is expressed in the Hazen (platinum-cobalt) color unit of the standard platinum-cobalt colorimetric solution closest to the sample. 4.4 Determination of pH value
4.4.1 Instruments and equipment
4.4.1.1 Acidometer: The graduation value is 0.02 pH unit, equipped with a glass electrode and a saturated calomel electrode. 4.4.2 Analysis steps
Put the sample in a beaker, stir it evenly, diffuse the calomel electrode and the glass electrode into the sample to be tested, and measure the pH value of the sample on the positioned acidometer.
The difference between the results of two parallel determinations is not greater than 0.2 pH units, and the arithmetic mean is taken as the determination result. 5 Inspection rules
5.1 Dodecyl dimethyl phenyl ammonium chloride shall be inspected by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer shall ensure that all products leaving the factory meet the requirements of this standard. Each batch of products leaving the factory shall be accompanied by a quality certificate, which includes: manufacturer name, product name, grade, batch number, net weight, production date, proof that the product quality meets this standard and standard number. 5.2 The unit has the right to inspect and accept the received dodecyl dimethyl phenyl ammonium chloride products in accordance with the provisions of this standard. 5.3 The weight of each batch of products shall not exceed 2t.
5.4 Determine the number of sampling units in accordance with Article 6.6 of GB6678. When sampling, use a glass tube or plastic tube to insert into the barrel at a depth of 5/6 to take out the sample. The sample taken out of each barrel shall not be less than 200g. Put them into two clean and dry bottles respectively, seal the bottle mouths, and label the bottles with the manufacturer name, product name, batch number, sampling date, and sampler. One bottle is used for inspection, and the other bottle is used as a reserved sample for inspection. The retention period is six months.
5.5 If one of the inspection results does not meet the requirements of this standard, a new sample should be taken from the barrel with the added number and inspected again. If one of the inspection results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.6 When the supply and demand parties have objections to the product quality, they shall be handled in accordance with the provisions of the "Interim Measures for National Product Quality Arbitration Inspection". 6 Marking, packaging, transportation and storage
6.1 Each barrel should be accompanied by a product certificate, and the outside of the barrel should have a firm and clear label, including: product name, manufacturer name, grade, net weight, batch number, production date, trademark, this standard number, and painted with upward and heat-resistant marks in accordance with GB191. 6.2 The product is packed in a plastic barrel with a net weight of 50kg, or an iron barrel with a plastic spray inside, with a net weight of 200kg. For long-distance transportation, if outer packaging is required, the supply and demand parties shall negotiate separately.
6.3 During handling and transportation, the product should be placed carefully and gently in the direction of effect. Impact is strictly prohibited to avoid leakage. 6.4 During storage, ventilation should be maintained and exposure to sunlight should be avoided. The storage period is two years. 7 Safety requirements
Alkyl methyl ammonium chloride products are corrosive and irritating to a certain extent. Operators should wear protective equipment during operations to avoid direct contact.
Additional instructions:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Tianjin Chemical Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Tianjin Chemical Research Institute of the Ministry of Chemical Industry and Shanghai Synthetic Detergent Sanguan. The main drafters of this standard are Shao Jiren, Zhang Shuchun, Yin Kegang, Zhang Yanli, and Hu Banfa. 124
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