HG/T 3642-1999 Water treatment agent acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid copolymer
Some standard content:
HG/T 3642
Water treatment agent acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid copolymer is a scale inhibitor and dispersant. This standard was proposed by the Technical Supervision Department of the former Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Water Treatment Agent Branch of the National Technical Committee for Chemical Standardization. The responsible drafting units of this standard are: Sinopec Petrochemical Research Institute, Beijing Yanshan Petrochemical Company Research Institute, and Tianjin Chemical Research and Design Institute of the Ministry of Chemical Industry.
The main drafters of this standard are: Chen Wenchuang, Pang Ruzhen, and Huang Jiapeng. 20f
Chemical Industry Standard of the People's Republic of China
Water treatment chemicals
Acrylic acid-2-acrylamido-2-methyl-propane-sulfomic acid copolymers
Water treatment chemicals--Acrylic acid-2-acrylamido-2-methyl-propane-sulfomic acid copolymersHG/T 3642—1999
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage of water treatment agents acrylic acid-2-methyl-2-acrylamido-propane-sulfomic acid copolymers. This standard applies to binary and multi-component copolymers composed of acrylic acid as the main body and 2-methyl-2-acrylamido-propanesulfonic acid, etc. This product is mainly used as a scale inhibitor and dispersant in industrial water treatment. Structural formula:
-ECH2--CH-}.ECH2-CH-},ER-},COOH
Wherein, R is acrylic acid ester, maleic acid, etc. 2 Reference standards
HN-CCH2—SO,H
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 the parties using this standard should explore the possibility of using the latest versions of the following standards. GB191-1990 Pictorial marking for packaging, storage and transportation
GB/T601--1988 Preparation of standard solution for titration analysis (volume analysis) of chemical reagents GB/T603-1988 Preparation of preparations and products used in test methods for chemical reagents (neqISO6353-1:1982) G13/T1250-1989 Methods for expressing and determining limit values General rules for sampling of chemical products
GB/T 6678-1986
GB/T6682-1992 Specifications and test methods for water used in analytical laboratories (negISO3696:1987) 3 Requirements
3.1 Appearance: colorless or yellow transparent liquid. 3.2 Water treatment agent acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid copolymers should meet the requirements of Table 1. Approved by the State Administration of Petroleum and Chemical Industry on August 12, 1999 and implemented on October 1, 2000
Solid condensate content, %
Free monomer (in terms of (H=CH(OOH) content)%PH value (1% aqueous solution)
Density (20C)-g/km
Limiting viscosity (30) dl/g
Test method
2-1999
HG/T 3642
0.055~0.100
The reagents and water used in this standard, unless otherwise specified, refer to analytically pure reagents and grade 3 water specified in GB/T6682. The standard titration solutions, preparations and products used in Test 1, unless otherwise specified, are prepared in accordance with the provisions of GB/T601 and GB/T603.
4.1 Identification
4.1.1 Method Summary
Carbon spectroscopy analysis of the sample was performed using a nuclear magnetic resonance instrument (1 3C NMR), dioxane as a base (external standard, 8.67.8X10-6), the following characteristic chemical shifts exist in the 13C spectrum, which can identify the presence of 2-methyl-2-acrylamidopropanesulfonic acid. ~27×10-yl
53×10*～55×10-methylene group connected to the sulfonic acid group～60×10'quaternary carbon connected to the amide group4.1.2 Analysis steps
Put the sample in a special sample tube for nuclear magnetic resonance measurement, and then add a capillary tube sealed with heavy water for locking. Qualitative determination is carried out under the conditions of broadband decoupling and pulse interval of 3s. 4.2 Determination of solid content
4.2.1 Summary of the method
At a certain overflow, place the sample in an electric drying oven and dry it to constant weight. 4.2.2 Instruments and equipment
General laboratory instruments and
4.2.2.1 Fan-shaped weighing bottle: 60mm×30mm. 4.2.2.2 Electric drying oven: temperature can be controlled at (120±2)C. 4.2.3 Analysis steps
Use Pre-dry the weighing bottle at (120 ± 2)°C and weigh about 0.7 μg of the sample (accurate to 0.0002 μg). Carefully shake the sample to allow it to flow naturally and form a uniform thin layer at the bottom of the bottle. Then put it in an electric drying oven, heat it from room temperature, and dry it at (120 ± 2) for 4 hours. Put the sample in the dryer and cool it to room temperature, then weigh it until it reaches constant weight. 4.2.4 Expression of analytical results
Solid content (X,) expressed as mass percentage is calculated according to test (1): _m2=mi×100 *
Where: m
Weighing bottle mass·
…The mass of the sample and the weighing bottle after drying, g"sample mass·.
4.2.5 Allowable difference
The arithmetic mean of the parallel determination results shall be taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.3%. 4.3 Determination of free monomer content
(1)
4.3.1 Summary of the method
HG/T 3642--1999
Under acidic conditions, the double bonds of the free monomers in the sample react with bromine. Excess bromine reacts with potassium iodide to precipitate iodine. Starch is used as an indicator and the precipitated iodine is titrated with sodium thiosulfate standard titration solution under neutral or weakly acidic conditions. 4.3.2 Reagents and materials
4.3.2.1 Hydrochloric acid solution: 1+1.
4.3.2.2 Potassium iodide solution: 100g/1.
4.3.2.3 Bromine solution: c(1/2Br2)0.1mol/4.3.2.4 Sodium thiosulfate standard titration solution: ccNa2s.0) about 0.1mol/. 4.3.2.5 Soluble starch solution: 10g/1. 4.3.3 Analysis steps
Weigh about 4g of sample (accurate to 0.001g) by splashing method and place it in a 500mL iodine volumetric flask with 20ml of water added in advance. Add 20.00mL bromine solution and 5mL hydrochloric acid solution, shake well, and place in a dark place for 30min. Take it out, add 15ml potassium iodide solution, shake well, and place in a dark place for: min. Take it out, add 150mL of water, and immediately titrate it with sodium thiosulfate standard titration solution until it turns light yellow. Add 1mL2ml starch indicator solution and continue titrating until the blue color disappears. This is the end point. When measuring the blank, follow the same steps (but without adding the sample) to perform a blank test. 4.3.4 Expression of analysis results bzxz.net
The free monomer (in terms of CHzCH一COOH) content (X,) expressed as mass percentage is calculated according to formula (2): Xx V)ex0. 036 03 ×100VV)x3. 603.m
Wherein; the volume of sodium thiosulfate standard titration solution consumed in the blank test, mL, V the volume of sodium thiosulfate standard titration solution consumed in the titration test solution, mL the actual concentration of sodium thiosulfate standard titration solution, mol/. mass of the sample, g;
(2)
0.036 (03: Consider 1.00mL sodium thiosulfate standard titration solution Lc (Naz$20) = 1.000mol/L] equivalent to the mass of acrylic acid expressed in grams.
4.3.5 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the two parallel determination results shall not exceed 0.03%. 4.4 Determination of pH value
4.4.1 Instruments and equipment | |tt||Acidity meter: accuracy 0.02 pH unit, equipped with saturated calomel reference electrode, glass measuring electrode or composite electrode. 4.4.2 Analysis steps
Weigh (1.00±0.01)g of sample, transfer all to a 100ml volumetric flask, dilute to the scale with water, and shake well. Pour the test solution into a beaker and place it on an electromagnetic stirrer. Immerse the electrode in the solution and start stirring. Read the pH value on the positioned acidity meter. 4.5 Determination of density
4.5.1 Instruments and equipment
4.5.1.1 Density meter: graduation value is 0.001g/cm, 4.5.1.2 Constant temperature water bath: temperature controlled at (20±1)C; 4.5.1.3 Glass measuring cylinder: 250ml
4.5.1.4 Full scale: 0~50℃, graduation value is 1C. 4.5.2 Analysis steps
Pour the sample into a clean and dry measuring cylinder without bubbles, and place the measuring cylinder in a constant temperature water bath at 20℃. After the temperature is constant, slowly put the clean and dry densimeter into the sample, and its lower end should be more than 2cm away from the bottom of the cylinder and cannot touch the cylinder wall. The liquid on the upper end of the densimeter exposed outside the liquid surface should not exceed 2-3 graduations. After the densimeter is stable in the sample, read the scale 209
HG/T 3642-1999
(except for the densimeter marked with the scale for reading the edge of the meniscus), which is the density of the sample. 4.6 Determination of limiting viscosity
4.6.1 Method summary
Make a dilute solution of the sample in 101/1 sodium thiocyanate solution, and determine its limiting viscosity using an Ubbelohde viscometer. 4.6.2 Reagents and materials
4.6.2.1 Sodium hydroxide solution: 80g/1. 4.6.2.2 Sodium thiocyanate solution: 101g/1. 4.6.3 Instruments and equipment
· General laboratory instruments and
4.6.3.1 Ubbelohde viscometer (as shown in Figure 1): capillary inner diameter 0.50mm (±2%). At (30±0.3)C, the time for the steam tank water to flow through the timing mark EF is more than 100s.
4.6.3.2 Constant temperature water bath: The temperature is controlled at (30±0.3)C. 4.6.3.3 Thermometer: 0~50C, scale value 0.1C. 4.6.3.4 Stopwatch: minimum scale value 0.1s. 4.6.3.5 Culture: $85mm.
4.6.3.6 Acid-resistant filter funnel: G3.40mL. 4.6.4 Analysis steps
4.6.4.1 Determination of the outflow time of sodium thiocyanate solution Place a clean, dry Ubbelohde viscometer vertically in a constant temperature water bath at (30±0.3)°C, add sodium thiocyanate solution through the G3 acid-resistant filter funnel until the Ubbelohde viscometer is filled between the G and H marks, and keep the temperature constant for 10min~15min. Use an ear wash bulb to suck the sodium thiocyanate solution above the C ball mark F. Use a stopwatch to measure the time for the sodium thiocyanate solution to flow through the timing marks E and F. Measure three times in a row, and the error should not exceed 0.2$, and take the average value t.
4.6.4.2 Preparation of test solution
Weigh about 5g of the sample and place it in the cultured blood. Use sodium hydroxide solution to carefully adjust the pH value of the test solution to 9.0 (check with precision pH test paper), then place it in an electric drying oven, start heating from room temperature, dry it at (120±2)°C for 4h, and cool it to room temperature in a dryer to prepare a dry sample. Weigh 0.8g1.0g of the sample (accurate to 0.0002g), place it in a 50mL beaker, dissolve it with about 20mL of sodium thiocyanate solution, transfer all of it to a 100mL volumetric flask, dilute it to the scale with sodium thiocyanate solution, and shake it well. 4.6.4.3 Determination
Put the test solution into a clean and dry Ubbelohde viscometer through a G3 acid-resistant filter funnel until it is filled between the G and H marks, and keep the temperature constant for 10min-~15min. Use an ear bulb to suck the test solution into the area above the C ball mark E, and use a stopwatch to measure the time for the test solution to flow through the timing marks E and F. Measure three times in a row - the error should not exceed 0.2s, and take the average value t. 4.6.5 Expression of analysis results
The limiting viscosity (X:) expressed in dl./g is calculated according to formula (3): Xx2(±=ln)2[(/t0-1)1nt/t)
（3）
Where: - specific viscosity, n=tto)/to
Relative viscosity, n=t/1o:
Concentration of test solution.g/di-,
.Time for sodium thiocyanate solution to flow through the viscometer timing marks E and F, s -Time for test solution to flow through the viscometer timing marks E and F, s. 4.6.6 Allowable difference
Take the arithmetic mean of the parallel determination results as the determination result. The absolute difference between two parallel determination results is no more than 0.004dI/g. 210
HG/T 3642..- 1999
Unit: mm
A-Lower storage ball, outer diameter 26mm;B-Floating level ball;C-Timing ball, volume 3.0mL (± s%);D-Upper rotten ball;E, F-Timing markings:G, H-Filling markings;l.-Releasing tube, outer diameter 11mm;M-Lower outlet tube, outer diameter 6mm;N-Upper outlet tube, outer diameter 7mm;P-Connecting tube, inner diameter 6.0mm (± 5%)+R-Working capillary, inner diameter 0.50mm (± 2%) Figure 1 Bird viscometer
5 Inspection rules
5.1 The solid content, free monomer content, pH value, density, limiting viscosity and other indicators specified in this standard are factory inspection items and should be inspected batch by batch 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.
5.2 The user has the right to inspect and accept the received products in accordance with the provisions of this standard. 211
HG/T3642---1999
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 in (B/T6678. When sampling, stir thoroughly first and insert a glass tube or polyethylene plastic tube into the 2/3 depth of the barrel to take the sample. The total amount should not be less than 1000m1; mix thoroughly and divide into two clean, dry bottles with ground stoppers and seal. The bottles are labeled with: manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is for inspection , and the other bottle is kept for three months for future reference
5.4 If one of the indicators in the test results does not meet the requirements of this standard, a new sample should be taken from the packaging unit of twice the amount for verification. If one of the verification results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.5 The rounded value comparison method specified in GB/T1250 is used to determine whether the test results meet the requirements. 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 "Quality Law of the People's Republic of China". 6 Marking. Packaging, transportation, storage
6.1 The packaging barrels of water treatment agent acrylic acid-2-methyl~2-acrylamide propane sulfonic acid copolymers should be painted with firm markings, including: manufacturer name, product name, trademark, batch number or production date, net weight, factory address and the "upward\ mark" specified in GB191. 6.2 Each batch of water treatment agent acrylic acid-2-methyl-2-acrylamide propane sulfonic acid copolymers shipped from the factory should be accompanied by a quality certificate, including: manufacturer name, production department name, trademark, batch number or production date 6.3 Water treatment agent acrylic acid-2-methyl-2-acrylamide disulfonic acid copolymer is packaged in polyethylene plastic barrels, with a net weight of 25kg per barrel; or in iron barrels lined with polypropylene plastic film bags, with a net weight of 200kg per barrel. 6.4 During transportation, it should be prevented from being exposed to the sun and stored in a dry and ventilated warehouse. 6.5 The storage period of permanent treatment agent acrylic acid-2-methyl-2-acrylamide propanesulfonic acid copolymer is ten months.3) In a constant temperature water bath at 3000 °C, add sodium thiocyanate solution through a G3 acid-resistant filter funnel until the filling mark G and H of the Ubbelohde viscometer are between, and the temperature is kept constant for 10-15 minutes. Use an ear bulb to absorb the sodium thiocyanate solution above the mark F of the ball C. Use a stopwatch to measure the time for the sodium thiocyanate solution to flow through the timing marks E and F. Measure three times in a row, and the error should not exceed 0.2$. Take the average value.
4.6.4.2 Preparation of test solution
Weigh about 5g of the sample and place it in cultured blood. Use sodium hydroxide solution to carefully adjust the pH value of the test solution to 9.0 (check with precision pH test paper), then place it in an electric drying oven, start heating from room temperature, dry at (120±2)°C for 4h, and cool to room temperature in a desiccator to prepare a dry sample. Weigh 0.8g1.0g of the sample (accurate to 0.0002g), place it in a 50mL beaker, dissolve it with about 20mL of sodium thiocyanate solution, transfer all of it to a 100ml volumetric flask, dilute it to the scale with sodium thiocyanate solution, and shake it well. 4.6.4.3 Determination
Add the test solution to a clean, dry Ubbelohde viscometer through a G3 acid-resistant filter funnel until it is filled between the G and H marks, and keep the temperature constant for 10min-~15min. Use an ear wash bulb to suck the test solution above the C ball mark E, and use a stopwatch to measure the time it takes for the test solution to flow through the timing marks E and F. Measure three times in a row - the error does not exceed 0.2s, and take the average value t. 4.6.5 Expression of analysis results
Limiting viscosity (X:) expressed in dl./g is calculated according to formula (3): Xx2(±=ln)2[(/t0-1)1nt/t)
（3）
Where: -Specific viscosity, n=tto)/to
Relative viscosity, n=t/1o:
Concentration of test solution.g/di-,
.Time for sodium thiocyanate solution to flow through the time mark E and F of the viscometer, s-Time for test solution to flow through the time mark E and F of the viscometer, s. 4.6.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the results of two parallel determinations shall not exceed 0.004dl/g. 210
HG/T 3642..- 1999
Unit: mm
A-Lower storage ball, outer diameter 26mm;B-Floating level ball;C-Timing ball, volume 3.0mL (± s%);D-Upper rotten ball;E, F-Timing markings:G, H-Filling markings;l.-Releasing tube, outer diameter 11mm;M-Lower outlet tube, outer diameter 6mm;N-Upper outlet tube, outer diameter 7mm;P-Connecting tube, inner diameter 6.0mm (± 5%) +R-Working capillary, inner diameter 0.50mm (± 2%) Figure 1 Bird viscometer
5 Inspection rules
5.1 The solid content, free monomer content, pH value, density, limiting viscosity and other indicators specified in this standard are factory inspection items and should be inspected batch by batch 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.
5.2 The user has the right to inspect and accept the received products in accordance with the provisions of this standard. 211
HG/T3642---1999
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 in (B/T6678. When sampling, stir thoroughly first and insert a glass tube or polyethylene plastic tube into the 2/3 depth of the barrel to take the sample. The total amount should not be less than 1000m1; mix thoroughly and divide into two clean, dry bottles with ground stoppers and seal. The bottles are labeled with: manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is for inspection , and the other bottle is kept for three months for future reference
5.4 If one of the indicators in the test results does not meet the requirements of this standard, a new sample should be taken from the packaging unit of twice the amount for verification. If one of the verification results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.5 The rounded value comparison method specified in GB/T1250 is used to determine whether the test results meet the requirements. 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 "Quality Law of the People's Republic of China". 6 Marking. Packaging, transportation, storage
6.1 The packaging barrels of water treatment agent acrylic acid-2-methyl~2-acrylamide propane sulfonic acid copolymers should be painted with firm markings, including: manufacturer name, product name, trademark, batch number or production date, net weight, factory address and the "upward\ mark" specified in GB191. 6.2 Each batch of water treatment agent acrylic acid-2-methyl-2-acrylamide propane sulfonic acid copolymers shipped from the factory should be accompanied by a quality certificate, including: manufacturer name, production department name, trademark, batch number or production date 6.3 Water treatment agent acrylic acid-2-methyl-2-acrylamide disulfonic acid copolymer is packaged in polyethylene plastic barrels, with a net weight of 25kg per barrel; or in iron barrels lined with polyolefin plastic film bags, with a net weight of 200kg per barrel. 6.4 During transportation, it should be protected from exposure to sunlight and stored in a dry and ventilated warehouse. 6.5 The storage period of permanent treatment agent acrylic acid-2-methyl-2-acrylamide propanesulfonic acid copolymer is ten months.3) In a constant temperature water bath at 3000 °C, add sodium thiocyanate solution through a G3 acid-resistant filter funnel until the filling mark G and H of the Ubbelohde viscometer are between them. Keep the temperature constant for 10-15 minutes. Use an ear bulb to absorb the sodium thiocyanate solution above the mark F of the ball C. Use a stopwatch to measure the time for the sodium thiocyanate solution to flow through the timing marks E and F. Measure three times in a row. The error should not exceed 0.2$, and the average value should be taken.
4.6.4.2 Preparation of test solution
Weigh about 5g of the sample and place it in cultured blood. Use sodium hydroxide solution to carefully adjust the pH value of the test solution to 9.0 (check with precision pH test paper), then place it in an electric drying oven, heat it from room temperature, dry it at (120±2)°C for 4h, and cool it to room temperature in a desiccator to prepare a dry sample. Weigh 0.8g1.0g of the sample (accurate to 0.0002g), place it in a 50mL beaker, dissolve it with about 20mL of sodium thiocyanate solution, transfer all of it to a 100ml volumetric flask, dilute it to the scale with sodium thiocyanate solution, and shake it well. 4.6.4.3 Determination
Add the test solution to a clean, dry Ubbelohde viscometer through a G3 acid-resistant filter funnel until it is filled between the G and H marks, and keep the temperature constant for 10min-~15min. Use an ear wash bulb to suck the test solution above the C ball mark E, and use a stopwatch to measure the time it takes for the test solution to flow through the timing marks E and F. Measure three times in a row - the error does not exceed 0.2s, and take the average value t. 4.6.5 Expression of analysis results
Limiting viscosity (X:) expressed in dl./g is calculated according to formula (3): Xx2(±=ln)2[(/t0-1)1nt/t)
（3）
Where: -Specific viscosity, n=tto)/to
Relative viscosity, n=t/1o:
Concentration of test solution.g/di-,
.Time for sodium thiocyanate solution to flow through the time mark E and F of the viscometer, s-Time for test solution to flow through the time mark E and F of the viscometer, s. 4.6.6 Allowable difference
The arithmetic mean of the parallel determination results is taken as the determination result. The absolute difference between the results of two parallel determinations shall not exceed 0.004dl/g. 210
HG/T 3642..- 1999
Unit: mm
A-Lower storage ball, outer diameter 26mm;B-Floating level ball;C-Timing ball, volume 3.0mL (± s%);D-Upper rotten ball;E, F-Timing markings:G, H-Filling markings;l.-Releasing tube, outer diameter 11mm;M-Lower outlet tube, outer diameter 6mm;N-Upper outlet tube, outer diameter 7mm;P-Connecting tube, inner diameter 6.0mm (± 5%)+R-Working capillary, inner diameter 0.50mm (± 2%) Figure 1 Bird viscometer
5 Inspection rules
5.1 The solid content, free monomer content, pH value, density, limiting viscosity and other indicators specified in this standard are factory inspection items and should be inspected batch by batch 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.
5.2 The user has the right to inspect and accept the received products in accordance with the provisions of this standard. 211
HG/T3642---1999
5.3 Determine the number of sampling units in accordance with the provisions of 6.6 in (B/T6678. When sampling, stir thoroughly first and insert a glass tube or polyethylene plastic tube into the 2/3 depth of the barrel to take the sample. The total amount should not be less than 1000m1; mix thoroughly and divide into two clean, dry bottles with ground stoppers and seal. The bottles are labeled with: manufacturer name, product name, batch number, sampling date and name of the sampler. One bottle is for inspection , and the other bottle is kept for three months for future reference
5.4 If one of the indicators in the test results does not meet the requirements of this standard, a new sample should be taken from the packaging unit of twice the amount for verification. If one of the verification results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.5 The rounded value comparison method specified in GB/T1250 is used to determine whether the test results meet the requirements. 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 "Quality Law of the People's Republic of China". 6 Marking. Packaging, transportation, storage
6.1 The packaging barrels of water treatment agent acrylic acid-2-methyl~2-acrylamide propane sulfonic acid copolymers should be painted with firm markings, including: manufacturer name, product name, trademark, batch number or production date, net weight, factory address and the "upward\ mark" specified in GB191. 6.2 Each batch of water treatment agent acrylic acid-2-methyl-2-acrylamide propane sulfonic acid copolymers shipped from the factory should be accompanied by a quality certificate, including: manufacturer name, production department name, trademark, batch number or production date 6.3 Water treatment agent acrylic acid-2-methyl-2-acrylamide disulfonic acid copolymer is packaged in polyethylene plastic barrels, with a net weight of 25kg per barrel; or in iron barrels lined with polypropylene plastic film bags, with a net weight of 200kg per barrel. 6.4 During transportation, it should be prevented from being exposed to the sun and stored in a dry and ventilated warehouse. 6.5 The storage period of permanent treatment agent acrylic acid-2-methyl-2-acrylamide propanesulfonic acid copolymer is ten months.4 If one of the indicators in the inspection results does not meet the requirements of this standard, sampling should be carried out again from twice the amount of packaging units. If one of the inspection results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.5 The rounded value comparison method specified in GB/T1250 shall be used to determine whether the inspection results meet the requirements. 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 "Quality Law of the People's Republic of China". 6 Marking. Packaging, transportation, storage
6.1 The packaging barrels of water treatment agent acrylic acid-2-methyl~2-acrylamidopropanesulfonic acid copolymers should be firmly marked, including: manufacturer name, product name, trademark, batch number or production date, net weight, factory address and the "upward\ mark" specified in GB191. 6.2 Each batch of water treatment agent acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid copolymers leaving the factory shall be accompanied by a quality certificate, including: manufacturer name, production department name, trademark, batch number or production date, net weight, factory address and the "upward\ mark" specified in GB191. 6.3 Water treatment agent acrylic acid-2-methyl-2-acrylamide disulfonic acid copolymer is packaged in polyethylene plastic barrels, with a net weight of 25kg per barrel; or in iron barrels lined with polyolefin plastic film bags, with a net weight of 200kg per barrel. 6.4 During transportation, it should be protected from exposure to sunlight and stored in a dry and ventilated warehouse. 6.5 The storage period of permanent treatment agent acrylic acid-2-methyl-2-acrylamide propanesulfonic acid copolymer is ten months.4 If one of the indicators in the inspection results does not meet the requirements of this standard, sampling should be carried out again from twice the amount of packaging units. If one of the inspection results does not meet the requirements of this standard, the entire batch of products cannot be accepted. 5.5 The rounded value comparison method specified in GB/T1250 shall be used to determine whether the inspection results meet the requirements. 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 "Quality Law of the People's Republic of China". 6 Marking. Packaging, transportation, storage
6.1 The packaging barrels of water treatment agent acrylic acid-2-methyl~2-acrylamidopropanesulfonic acid copolymers should be firmly marked, including: manufacturer name, product name, trademark, batch number or production date, net weight, factory address and the "upward\ mark" specified in GB191. 6.2 Each batch of water treatment agent acrylic acid-2-methyl-2-acrylamidopropanesulfonic acid copolymers leaving the factory shall be accompanied by a quality certificate, including: manufacturer name, production department name, trademark, batch number or production date, net weight, factory address and the "upward\ mark" specified in GB191. 6.3 Water treatment agent acrylic acid-2-methyl-2-acrylamide disulfonic acid copolymer is packaged in polyethylene plastic barrels, with a net weight of 25kg per barrel; or in iron barrels lined with polyolefin plastic film bags, with a net weight of 200kg per barrel. 6.4 During transportation, it should be protected from exposure to sunlight and stored in a dry and ventilated warehouse. 6.5 The storage period of permanent treatment agent acrylic acid-2-methyl-2-acrylamide propanesulfonic acid copolymer is ten months.
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