Some standard content:
National Standard of the People's Republic of China
Dichlorvos emulsifiable concentrate
Dichlorvos emulsifiable concentrates1Subject content and scope of application
GB.2548-93
GB2548-81
This standard specifies the technical indicators and test methods of dichlorvos emulsifiable concentrate, test rules, product warranty period, and requirements for marking, packaging, transportation and storage.
This standard applies to dichlorvos emulsifiable concentrate prepared from dichlorvos technical produced by two process routes: the alkaline hydrolysis method of Dichlorvos and the trimethyl phosphite method, and suitable emulsifiers and solvents.
Active ingredient: Dichlorvos
Chemical name; 0,O-methyl-0-(2,2-dihydrogen) vinyl phosphate
Structural formula: (CH,O),P--O—CHCCl
Molecular formula: C,H,C,O,P
Relative molecular mass: 220.98 (according to the international relative atomic mass in 1987)2
Cited standards
GB 190
GB 191
Dangerous goods packaging mark
Packaging storage and transportation pictorial mark
GB1600 Determination of moisture content in pesticides
GB1603 Determination of stability of pesticide emulsions Emulsifiable concentrate pesticide packaging
GB4838
3 Technical requirements
3.1 Appearance: light yellow to yellow-brown transparent liquid. 3.2 Dichlorvos emulsifiable concentrate shall also meet the following index requirements: Item
Dichlorvos content, %(m/m)
Acidity (as H,SU,), %(m/m)
Moisture, %(m/m)
Emulsion stability (200 times diluted)
Low temperature stability\
Hot stability\
Note: 1) Test at least once every six months.
Approved by the State Administration of Technology on January 11, 199380% EC
50% EC
Implemented on November 1, 1993
4 Test method
4.1 Determination of chlorpyrifos content
4.1-1 Summary of method
GB2548-93
The sample is dissolved in trichloromethane and pentadecane is used as the internal standard. Chromatographic separation is carried out on a 10% DC-550 column and the content is determined by a hydrogen flame ionization detector or a thermal conductivity cell detector.
4.1.2 Reagents and solutions
Chloroform (GB682);
b. Pentadecane: internal standard (no impurities that interfere with chromatographic analysis) Stationary liquid: Silicone DC-550;
Carrier: 101180~250m (60~80 mesh), treated with aqua regia (or other carriers with the same performance) d.
Carrier treatment method: Use newly prepared aqua regia to soak at 80C for 16~24h, wash with water, dry, sieve, and set aside. Dichlorvos standard sample: known content ≥98.0%; e.
Internal standard solution: accurately weigh about 1.0g of pentadecane, place it in a 50mL volumetric flask, dissolve it with chloroform and dilute to the scale, and broadcast f
sentence (for use with hydrogen flame ionization detector). 4. 1.3 Instruments
a. Gas chromatograph: with hydrogen flame ionization detector or thermal conductivity cell detector; b. Chromatographic column: 2m×3mm (id) borosilicate glass (or stainless steel) column tube, the column filling material is 10% Dc-550/Shangshi 101 (180~250 μm, aqua regia treatment);
c. Recorder (or electronic digital integrator); d.: Micro-injector: 10uL.
4.1.4 Operation steps
4.1.4.1 Preparation of chromatographic column
Coating of stationary liquid: Accurately weigh 2.0g DC-550, place it in a 250mL round-bottom flask with a standard opening of No. 24, add enough #
chloroform to dissolve all the DC-550, add a certain amount (about 20g) of carrier according to the proportion of the stationary liquid, and just cover it with the stationary liquid bath. Then, use a rotary evaporator for coating. Under reduced pressure, start the rotary evaporator, heat it with a water bath or infrared lamp until the bath is almost dry, place it in a 120°C oven, dry it for 2h, take it out and cool it, sieve it, and set it aside. b. Filling of chromatographic column: Connect a small funnel to the inlet of the cleaned and dried glass column (or stainless steel column), plug an appropriate amount of glass wool (silanized) into the outlet and wrap it with gauze, and connect it to the vacuum pump through a rubber tube. Start the vacuum pump, add the column filler from the funnel in batches, and tap the column tube continuously. After the filler fills the chromatographic column tube evenly and tightly, stop the vacuum pump. Also plug a small ball of glass wool at the inlet end and press it properly to prevent the filler from moving. c. "Aging" of chromatographic column: Connect the inlet end of the chromatographic column to the vaporization chamber of the gas chromatograph, and do not connect the detector to the outlet end for the time being. Raise the temperature to 220C in stages at a carrier gas (nitrogen) flow rate of about 15mL/min, and age at this temperature for at least 24h. After cooling down, connect the outlet to the detector.
4.1.4.2 Hydrogen flame ionization detector method
4. 1. 4.2. 1 Chromatographic operating conditions
Temperature: Column box 174℃, vaporization chamber 200℃, detector 250℃, a.bzxZ.net
b. Gas flow rate Carrier gas (N) about 37mL/min Hydrogen about 32mL/min/Air about 300400mL/minlc. Amplification and attenuation:
Adjust the amplification and attenuation to make the chromatographic peak height of dichlorvos and 1-pentadecane 60% to 80% of the full scale of the recorder; d. Retention time: dichlorvos about 2.2min; pentadecane about 3.8min. Analysts can adjust the chromatographic operating conditions appropriately according to the differences in instrument performance and chromatographic columns in order to obtain the best effect. GB 2548—93
Gas chromatogram of dichlorvos emulsifiable concentrate
1Solvent*2—Unknown3—Unknown: 4—Dichlorvos, 5-pentadecane4.1.4.2.2° Preparation of standard solution and sample solution Standard solution: Accurately weigh 0.15g (accurate to 0.0002g) of dichlorvos standard sample and place it in a 10mL stoppered glass a.
bottle. Use a pipette to accurately add 2mL of internal standard solution and mix carefully. h. Sample solution: Accurately weigh a sample containing about 0.15g (accurate to 0.0002g) of dichlorvos, place it in another 10mL stoppered glass bottle, use the same pipette to accurately add 2mL of internal standard solution, and mix carefully. The standard solution and sample solution are required to be prepared at the same time as much as possible. 4.1.4.2.3 Determination
Under the specified chromatographic operating conditions, after the instrument is stable, inject several needles of standard solution until the peak area ratio of two adjacent needles is basically stable (the change is not more than 1.5%). Inject and analyze in the following order: a. Standard solution:
b. Sample solution;
Sample solution,
Standard solution.
4.1.4.2. 4 Calculation
After averaging the peak area ratios of the two standard sample solutions a and d and the two sample solutions b and c, calculate the percentage of dichlorvos in the sample according to formula (1) ()
-The average value of the peak area ratio of dichlorvos to the internal standard in the two sample solutions! In the formula; ri--the average value of the peak area ratio of dichlorvos to the internal standard in the two standard sample solutions; m1--the weighing area of the dichlorvos sample;
-the weighing amount of the dichlorvos standard sample, 1
r--the percentage of the dichlorvos standard sample (m/m). 4.1.4.2.5 Allowable difference
The difference between the peaks of the parallel determinations shall not be greater than 1.0%. (
4.1.4.3 Thermal conductivity cell detector method
4. 1. 4.3.1 Chromatographic operating conditions
GB 2548—93
Temperature: 174℃ column box, 200℃ vaporization chamber, 180℃ detector; a
bridge current: 200mA;
carrier gas (Hz) flow rate: about 100mL/min; dampening and attenuation: adjust the amplification and attenuation to make the chromatographic peak height of dichlorvos and pentadecane 60% to 80% of the full scale of the recorder; retention time: about 2min for dichlorvos and about 3min for pentadecane. e.||tt ||Analysts can adjust the chromatographic operating conditions appropriately according to the differences in instrument performance and chromatographic columns in order to obtain the best results. 4.1.4.3.2 Preparation of standard solution and test solution 4. Standard solution: Accurately weigh about 0.16g (accurate to 0.0002g) of pentadecane and dichlorvos standard samples respectively, add 1mL of chloroform to the same 10mL stoppered glass bottle, cover tightly, and carefully mix. b Test solution Accurately weigh about 0.16g (accurate to 0.0002g) of pentadecane and a sample containing about 0.16g (accurate to 0.0002g) of dichlorvos are placed in another 10ml stoppered glass bottle, 1mL of chloroform is added, the cover is tightly closed, and careful mixing is performed. 4.1.4.3.3 Determination
Under the specified chromatographic operating conditions, after the instrument is stable, inject several needles of standard sample solution until the peak area ratio of two adjacent needles is basically stable (the change is not more than 1.5%), and then inject and analyze in the following order: a.
Standard sample solution
Sample solution;
Sample excess solution;
Standard sample solution.
4.1.4.3.4 Calculation
Correction factor (force) is calculated according to formula (2):
f=×mP
Wherein: A is the average value of the peak area of the internal standard in the two-shot standard sample bath; A is the average value of the peak area of dichlorvos in the two-shot standard sample solution;
is the sample amount of the internal standard in the standard sample solution;
is the sample amount of the dichlorvos standard sample;
is the percentage content of the dichlorvos standard sample (m/m). The percentage of dichlorvos in the sample (3) is calculated according to formula (3): A' is the average value of the peak area of the internal standard substance in one injection of the sample solution; the average value of the peak area of dichlorvos in one injection of the sample solution: the sample weight of the internal standard substance in the sample solution, g - the sample weight of the sample, g
is the relative correction factor of dichlorvos. 4.1.4.3.5 Allowable difference
The difference between the results of parallel determinations should not exceed 1.0%. 4.2 Determination of acidity
+*-(2)
4.2-1 Reagents and solutions
GB2548-93
8. Sodium hydroxide (GB629) tc(NaOH)=0.02mol/L standard solution: b. Methyl red (HG3-958): 0.1g/100mL ethanol solution. 4.2.2 Determination steps
Weigh 5~10 g of the sample (accurate to 0.001 g), place it in a 250 mL conical flask, add 100 mL of water and 5 drops of 0.1 g/100 mL methyl red indicator solution, and titrate with 0.02mol/1L sodium hydroxide standard solution until the test solution turns orange as the end point. Perform a blank determination at the same time. The acidity (ts) expressed as a mass basis percentage is calculated according to formula (4): = VV) × 0 049 × 100
Wherein: c—actual concentration of sodium hydroxide standard solution, mol/L; V1—volume of sodium hydroxide standard solution consumed when titrating blank, mL; IV—volume of sodium oxide standard solution consumed when titrating sample, mL—sample weight, g,
..--(4)
0. 049~—mass of sulfuric acid in grams equivalent to 1. 00 mL sodium hydroxide standard solution [c(Na0H) = 1. 000 mol/L]. 4.3 Determination of water content
Determine according to the Karl Fischer method in GB 1600. 4.4 Determination of emulsion stability
Determine according to GB 1603, the measuring temperature is 30 ± 1°C, and the emulsifiable concentrate dilution multiple is 200 times. 4.5 Determination of low temperature stability
Put 50 ml of the sample in a 100 mL beaker, put the beaker in an ice bath, and place it at 0±1°C for 1 hour. During the placement period, stir it every 15 minutes, and stir for 0.5 minutes each time. After 1 hour, if there is no solid or oily matter precipitated in the sample, the low temperature stability of the product is qualified.
4.6 Determination of hot storage stability
Use a medical syringe to carefully inject 10~20mL of the sample into the ampoule (note! Do not let the sample contact the ampoule): Place the ampoule in an ice salt bath, and seal it with a gas lamp alcohol burner (note! Try to avoid solvent evaporation), and seal at least two bottles. Put the sealed ampoule into a metal container first, and then place it in an oven at 354±2°C or in a constant temperature water. After storing for 14 days, take it out and cool it to room temperature, and complete all test items within 24 hours. After hot storage, if the content of dichlorvos is not less than 85% of the content before hot storage and the acidity is not higher than 1.0%, the hot storage stability of the product is qualified.
5 Inspection rules
5.1 Dichlorvos emulsion should be inspected by the quality inspection department of the manufacturer. The manufacturer should ensure that all dichlorvos emulsions shipped meet the requirements of this standard. Each batch of dichlorvos emulsion shipped should be accompanied by a quality certificate in a certain format. 5.2 The user has the right to inspect whether the quality of the dichlorvos emulsion received meets the requirements of this standard in accordance with the provisions of this standard. 5.3 The amount of each batch of dichlorvos emulsion should not exceed the capacity of the storage tank (or measuring tank) before packaging. The inspection batch number, production batch number and packaging batch number must be consistent.
54 Low temperature stability and hot storage stability should be inspected at least once every six months, and other items should be inspected. 5.5 Sampling method: Use a sampler to sample 5% of the total number of boxes in each batch, and the small batch sampling shall not be less than three boxes. Mix the samples evenly and take no less than 200 samples into living, dry glass bottles with tight ground stoppers. Paste labels on the bottles, indicating: manufacturer name, product name, batch number and sampling date, and send them to the inspection department for inspection. 5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, re-sample from twice the amount of packaging boxes for re-inspection. In the results of the re-inspection, even if only one indicator does not meet the requirements of this standard, the entire batch of dichlorvos emulsifiable concentrate is unqualified. GB254B—93
5.7 When the supply and demand parties have disputes over product quality, they can be resolved through negotiation or the selected arbitration institution can conduct arbitration inspection using the methods specified in this standard.
6 Marking, packaging, transportation and storage
6-1 Each box and each bottle should be marked with: manufacturer's name, product name, trademark, production batch number, net weight, production license number, pesticide registration number, this standard number and usage instructions and precautions (limited to the bottle label), and in accordance with the provisions of GB190, GB191GB4838, indicate the relevant signs.
6-2 Dichlorvos emulsifiable concentrate is prohibited from being packaged in ordinary iron barrels. It must be packaged in clean and dry glass bottles and divided into 1kg and 0.5kg bottles as the main packaging units. The net weight of each bottle is allowed to fluctuate by ±2%, and the net weight of each box shall not be lower than the marked weight. The bottles are lined with suitable materials such as straw covers and straw mats and are tightly arranged in wooden boxes or calcium boxes. 6.3 Each batch of packaged finished products shall be accompanied by a quality certificate, which shall include: manufacturer name, product name, batch number, ex-factory date, net weight and product quality compliance with the requirements of this standard and the number of this standard. 6.4 During storage and transportation, strictly prevent moisture, heat and sunlight, keep good ventilation, and do not mix with food, seeds, and feed; avoid contact with skin and inhalation.
6-5 Under normal storage and transportation conditions, the warranty period of this product is two years. Within three months, the content of dichlorvos shall not be less than the provisions of Article 3.2. Within one year, the content of dichlorvos shall not be less than 73.5% and 45.5%, and the acidity shall not be greater than 0.8%. Within two years, the content of dichlorvos shall not be less than 72.0% and 44.0%, and the acidity shall not be greater than 1.2%. Additional remarks:
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China and is under the technical jurisdiction of the Shenyang Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard was drafted by Tianjin Pesticide General Factory. The main drafters of this standard are Xie Zaixiang, Han Lu, and Yang Jinlan. ..com
A#×m\×/×100
A' is the average value of the peak area of the internal standard in one
and two injections of the sample solution; the average value of the peak area of dichlorvos in one
and two injections of the sample solution: the sample weight of the internal standard in the sample solution, g - the sample weight, g
is the relative correction factor of dichlorvos. 4.1.4.3.5 Allowable difference
The difference between the parallel determination results should not exceed 1.0%. 4.2 Determination of acidity
+*-(2)
4.2-1 Reagents and solutions
GB2548-93
8. Sodium hydroxide (GB629) tc(NaOH)=0.02mol/L standard solution: b. Methyl red (HG3-958): 0.1g/100mL ethanol solution. 4.2.2 Determination steps
Weigh 5~10 g of the sample (accurate to 0.001 g), place it in a 250 mL conical flask, add 100 mL of water and 5 drops of 0.1 g/100 mL methyl red indicator solution, and titrate with 0.02mol/1L sodium hydroxide standard solution until the test solution turns orange as the end point. Perform a blank determination at the same time. The acidity (ts) expressed as a mass basis percentage is calculated according to formula (4): = VV) × 0 049 × 100
Wherein: c—actual concentration of sodium hydroxide standard solution, mol/L; V1—volume of sodium hydroxide standard solution consumed when titrating blank, mL; IV—volume of sodium oxide standard solution consumed when titrating sample, mL—sample weight, g,
..--(4)
0. 049~—mass of sulfuric acid in grams equivalent to 1. 00 mL sodium hydroxide standard solution [c(Na0H) = 1. 000 mol/L]. 4.3 Determination of water content
Determine according to the Karl Fischer method in GB 1600. 4.4 Determination of emulsion stability
Determine according to GB 1603, the measuring temperature is 30 ± 1°C, and the emulsifiable concentrate dilution multiple is 200 times. 4.5 Determination of low temperature stability
Put 50 ml of the sample in a 100 mL beaker, put the beaker in an ice bath, and place it at 0±1°C for 1 hour. During the placement period, stir it every 15 minutes, and stir for 0.5 minutes each time. After 1 hour, if there is no solid or oily matter precipitated in the sample, the low temperature stability of the product is qualified.
4.6 Determination of hot storage stability
Use a medical syringe to carefully inject 10~20mL of the sample into the ampoule (note! Do not let the sample contact the ampoule): Place the ampoule in an ice salt bath, and seal it with a gas lamp alcohol burner (note! Try to avoid solvent evaporation), and seal at least two bottles. Put the sealed ampoule into a metal container first, and then place it in an oven at 354±2°C or in a constant temperature water. After storing for 14 days, take it out and cool it to room temperature, and complete all test items within 24 hours. After hot storage, if the content of dichlorvos is not less than 85% of the content before hot storage and the acidity is not higher than 1.0%, the hot storage stability of the product is qualified.
5 Inspection rules
5.1 Dichlorvos emulsion should be inspected by the quality inspection department of the manufacturer. The manufacturer should ensure that all dichlorvos emulsions shipped meet the requirements of this standard. Each batch of dichlorvos emulsion shipped should be accompanied by a quality certificate in a certain format. 5.2 The user has the right to inspect whether the quality of the dichlorvos emulsion received meets the requirements of this standard in accordance with the provisions of this standard. 5.3 The amount of each batch of dichlorvos emulsion should not exceed the capacity of the storage tank (or measuring tank) before packaging. The inspection batch number, production batch number and packaging batch number must be consistent.
54 Low temperature stability and hot storage stability should be inspected at least once every six months, and other items should be inspected. 5.5 Sampling method: Use a sampler to sample 5% of the total number of boxes in each batch, and the small batch sampling shall not be less than three boxes. Mix the samples evenly and take no less than 200 samples into living, dry glass bottles with tight ground stoppers. Paste labels on the bottles, indicating: manufacturer name, product name, batch number and sampling date, and send them to the inspection department for inspection. 5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, re-sample from twice the amount of packaging boxes for re-inspection. In the results of the re-inspection, even if only one indicator does not meet the requirements of this standard, the entire batch of dichlorvos emulsifiable concentrate is unqualified. GB254B—93
5.7 When the supply and demand parties have disputes over product quality, they can be resolved through negotiation or the selected arbitration institution can conduct arbitration inspection using the methods specified in this standard.
6 Marking, packaging, transportation and storage
6-1 Each box and each bottle should be marked with: manufacturer's name, product name, trademark, production batch number, net weight, production license number, pesticide registration number, this standard number and usage instructions and precautions (limited to the bottle label), and in accordance with the provisions of GB190, GB191GB4838, indicate the relevant signs.
6-2 Dichlorvos emulsifiable concentrate is prohibited from being packaged in ordinary iron barrels. It must be packaged in clean and dry glass bottles and divided into 1kg and 0.5kg bottles as the main packaging units. The net weight of each bottle is allowed to fluctuate by ±2%, and the net weight of each box shall not be lower than the marked weight. The bottles are lined with suitable materials such as straw covers and straw mats and are tightly arranged in wooden boxes or calcium boxes. 6.3 Each batch of packaged finished products shall be accompanied by a quality certificate, which shall include: manufacturer name, product name, batch number, ex-factory date, net weight and product quality compliance with the requirements of this standard and the number of this standard. 6.4 During storage and transportation, strictly prevent moisture, heat and sunlight, keep good ventilation, and do not mix with food, seeds, and feed; avoid contact with skin and inhalation.
6-5 Under normal storage and transportation conditions, the warranty period of this product is two years. Within three months, the content of dichlorvos shall not be less than the provisions of Article 3.2. Within one year, the content of dichlorvos shall not be less than 73.5% and 45.5%, and the acidity shall not be greater than 0.8%. Within two years, the content of dichlorvos shall not be less than 72.0% and 44.0%, and the acidity shall not be greater than 1.2%. Additional remarks:
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China and is under the technical jurisdiction of the Shenyang Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard was drafted by Tianjin Pesticide General Factory. The main drafters of this standard are Xie Zaixiang, Han Lu, and Yang Jinlan. ..com
A#×m\×/×100
A' is the average value of the peak area of the internal standard in one
and two injections of the sample solution; the average value of the peak area of dichlorvos in one
and two injections of the sample solution: the sample weight of the internal standard in the sample solution, g - the sample weight, g
is the relative correction factor of dichlorvos. 4.1.4.3.5 Allowable difference
The difference between the parallel determination results should not exceed 1.0%. 4.2 Determination of acidity
+*-(2)
4.2-1 Reagents and solutions
GB2548-93
8. Sodium hydroxide (GB629) tc(NaOH)=0.02mol/L standard solution: b. Methyl red (HG3-958): 0.1g/100mL ethanol solution. 4.2.2 Determination steps
Weigh 5~10 g of the sample (accurate to 0.001 g), place it in a 250 mL conical flask, add 100 mL of water and 5 drops of 0.1 g/100 mL methyl red indicator solution, and titrate with 0.02mol/1L sodium hydroxide standard solution until the test solution turns orange as the end point. Perform a blank determination at the same time. The acidity (ts) expressed as a mass basis percentage is calculated according to formula (4): = VV) × 0 049 × 100
Wherein: c—actual concentration of sodium hydroxide standard solution, mol/L; V1—volume of sodium hydroxide standard solution consumed when titrating blank, mL; IV—volume of sodium oxide standard solution consumed when titrating sample, mL—sample weight, g,
..--(4)
0. 049~—mass of sulfuric acid in grams equivalent to 1. 00 mL sodium hydroxide standard solution [c(Na0H) = 1. 000 mol/L]. 4.3 Determination of water content
Determine according to the Karl Fischer method in GB 1600. 4.4 Determination of emulsion stability
Determine according to GB 1603, the measuring temperature is 30 ± 1°C, and the emulsifiable concentrate dilution multiple is 200 times. 4.5 Determination of low temperature stability
Put 50 ml of the sample in a 100 mL beaker, put the beaker in an ice bath, and place it at 0±1°C for 1 hour. During the placement period, stir it every 15 minutes, and stir for 0.5 minutes each time. After 1 hour, if there is no solid or oily matter precipitated in the sample, the low temperature stability of the product is qualified.
4.6 Determination of hot storage stability
Use a medical syringe to carefully inject 10~20mL of the sample into the ampoule (note! Do not let the sample contact the ampoule): Place the ampoule in an ice salt bath, and seal it with a gas lamp alcohol burner (note! Try to avoid solvent evaporation), and seal at least two bottles. Put the sealed ampoule into a metal container first, and then place it in an oven at 354±2°C or in a constant temperature water. After storing for 14 days, take it out and cool it to room temperature, and complete all test items within 24 hours. After hot storage, if the content of dichlorvos is not less than 85% of the content before hot storage and the acidity is not higher than 1.0%, the hot storage stability of the product is qualified.
5 Inspection rules
5.1 Dichlorvos emulsion should be inspected by the quality inspection department of the manufacturer. The manufacturer should ensure that all dichlorvos emulsions shipped meet the requirements of this standard. Each batch of dichlorvos emulsion shipped should be accompanied by a quality certificate in a certain format. 5.2 The user has the right to inspect whether the quality of the dichlorvos emulsion received meets the requirements of this standard in accordance with the provisions of this standard. 5.3 The amount of each batch of dichlorvos emulsion should not exceed the capacity of the storage tank (or measuring tank) before packaging. The inspection batch number, production batch number and packaging batch number must be consistent.
54 Low temperature stability and hot storage stability should be inspected at least once every six months, and other items should be inspected. 5.5 Sampling method: Use a sampler to sample 5% of the total number of boxes in each batch, and the small batch sampling shall not be less than three boxes. Mix the samples evenly and take no less than 200 samples into living, dry glass bottles with tight ground stoppers. Paste labels on the bottles, indicating: manufacturer name, product name, batch number and sampling date, and send them to the inspection department for inspection. 5.6 If one of the indicators in the inspection results does not meet the requirements of this standard, re-sample from twice the amount of packaging boxes for re-inspection. In the results of the re-inspection, even if only one indicator does not meet the requirements of this standard, the entire batch of dichlorvos emulsifiable concentrate is unqualified. GB254B—93
5.7 When the supply and demand parties have disputes over product quality, they can be resolved through negotiation or the selected arbitration institution can conduct arbitration inspection using the methods specified in this standard.
6 Marking, packaging, transportation and storage
6-1 Each box and each bottle should be marked with: manufacturer's name, product name, trademark, production batch number, net weight, production license number, pesticide registration number, this standard number and usage instructions and precautions (limited to the bottle label), and in accordance with the provisions of GB190, GB191GB4838, indicate the relevant signs.
6-2 Dichlorvos emulsifiable concentrate is prohibited from being packaged in ordinary iron barrels. It must be packaged in clean and dry glass bottles and divided into 1kg and 0.5kg bottles as the main packaging units. The net weight of each bottle is allowed to fluctuate by ±2%, and the net weight of each box shall not be lower than the marked weight. The bottles are lined with suitable materials such as straw covers and straw mats and are tightly arranged in wooden boxes or calcium boxes. 6.3 Each batch of packaged finished products shall be accompanied by a quality certificate, which shall include: manufacturer name, product name, batch number, ex-factory date, net weight and product quality compliance with the requirements of this standard and the number of this standard. 6.4 During storage and transportation, strictly prevent moisture, heat and sunlight, keep good ventilation, and do not mix with food, seeds, and feed; avoid contact with skin and inhalation.
6-5 Under normal storage and transportation conditions, the warranty period of this product is two years. Within three months, the content of dichlorvos shall not be less than the provisions of Article 3.2. Within one year, the content of dichlorvos shall not be less than 73.5% and 45.5%, and the acidity shall not be greater than 0.8%. Within two years, the content of dichlorvos shall not be less than 72.0% and 44.0%, and the acidity shall not be greater than 1.2%. Additional remarks:
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China and is under the technical jurisdiction of the Shenyang Chemical Industry Research Institute of the Ministry of Chemical Industry. This standard was drafted by Tianjin Pesticide General Factory. The main drafters of this standard are Xie Zaixiang, Han Lu, and Yang Jinlan. ..com5 nin. After 1 h, if no solid or oily matter precipitates from the sample, the low-temperature stability of the product is qualified.
4.6 Determination of hot storage stability
Use a medical syringe to carefully inject 10-20 mL of the sample into the ampoule (note! Do not let the sample contact the ampoule): Place the ampoule in an ice-salt bath and seal it with a gas lamp alcohol burner (note! Try to avoid solvent evaporation), and seal at least two bottles. Put the sealed ampoule into a metal container first, and then place it in an oven at 354±2℃ or in constant water. After storage for 14 days, take it out and cool it to room temperature, and complete all test items within 24 hours. After hot storage, the content of dichlorvos is not less than 85% of the content before hot storage and the acidity is not higher than 1.0%, then the hot storage stability of the product is qualified.
5 Inspection rules
5.1 Therefore, dichlorvos emulsifiable concentrate should be inspected by the quality inspection department of the manufacturer. The manufacturer shall ensure that all the dichlorvos emulsions shipped out of the factory meet the requirements of this standard. Each batch of dichlorvos emulsions shipped out of the factory shall be accompanied by a quality certificate in a certain format. 5.2 The user has the right to inspect whether the quality of the dichlorvos emulsions received meets the requirements of this standard in accordance with the provisions of this standard. 5.3 The amount of each batch of dichlorvos emulsions shall not exceed the capacity of the storage tank (or measuring tank) before packaging. The inspection batch number, production batch number and packaging batch number must be consistent.
54 Low temperature stability and heat storage stability shall be inspected at least once every six months, and other items shall be inspected. 5.5 Sampling method: Use a sampler to take samples from 5% of the total number of boxes in each batch, and the small batch sampling shall not be less than three boxes. Mix the samples taken and take no less than 200 samples and put them into living, dry and tightly ground glass bottles. Paste labels on the bottles, indicating: manufacturer name, product name, batch number and sampling date, and send them to the inspection department for inspection. 5.6 If one of the indicators in the test results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging boxes for re-testing. In the results of the re-test, even if only one indicator does not meet the requirements of this standard, the entire batch of dichlorvos emulsifiable concentrate is unqualified. GB254B-93
5.7 When the supply and demand parties have disputes over product quality, they can be resolved through negotiation or the selected arbitration agency can conduct arbitration inspection using the methods specified in this standard.
6 Marking, packaging, transportation and storage
6-1 Each box and each bottle should be marked with: manufacturer name, product name, trademark, production batch number, net weight, production license number, pesticide registration number, this standard number and usage instructions and precautions (limited to bottle labels), and in accordance with the provisions of GB190, GB191GB4838, indicate the relevant signs.
6-2 Dichlorvos emulsion is prohibited from being packaged in general iron barrels. It should be packaged in clean and dry glass bottles and divided into 1kg and 0.5kg bottles as the main packaging units. The net mass of each bottle is allowed to fluctuate by ±2%, and the net mass of each box shall not be lower than the indicated mass. The bottles are lined with suitable materials such as straw covers and straw mats, and are tightly arranged in wooden boxes or calcium boxes. 6.3 Each batch of packaged finished products shall be accompanied by a quality certificate, which includes: the name of the manufacturer, product name, production batch number, ex-factory date, net mass, and the number of the product quality that meets the requirements of this standard. 6.4 During storage and transportation, strictly prevent moisture, heat and sunlight to keep good ventilation, and do not mix with food, seeds, and feed; avoid contact with skin and inhalation.
6-5 Under normal storage and transportation conditions, the warranty period of this product is two years. Within three months, the dichlorvos content should not be lower than the provisions of Article 3.2. Within one year, the content of dichlorvos should not be less than 73.5% and 45.5%, and the acidity should not be greater than 0.8%. Within two years, the content of dichlorvos should not be less than 72.0% and 44.0%, and the acidity should not be greater than 1.2%. Additional remarks:
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China, and the technical management is under the Shenyang Chemical Research Institute of the Ministry of Chemical Industry. This standard was drafted by Tianjin Pesticide General Factory. The main drafters of this standard are Xie Zaixiang, Han Lu, and Yang Jinlan. ..com5 nin. After 1 h, if no solid or oily matter precipitates from the sample, the low-temperature stability of the product is qualified.
4.6 Determination of hot storage stability
Use a medical syringe to carefully inject 10-20 mL of the sample into the ampoule (note! Do not let the sample contact the ampoule): Place the ampoule in an ice-salt bath and seal it with a gas lamp alcohol burner (note! Try to avoid solvent evaporation), and seal at least two bottles. Put the sealed ampoule into a metal container first, and then place it in an oven at 354±2℃ or in constant water. After storage for 14 days, take it out and cool it to room temperature, and complete all test items within 24 hours. After hot storage, the content of dichlorvos is not less than 85% of the content before hot storage and the acidity is not higher than 1.0%, then the hot storage stability of the product is qualified.
5 Inspection rules
5.1 Therefore, dichlorvos emulsifiable concentrate should be inspected by the quality inspection department of the manufacturer. The manufacturer shall ensure that all the dichlorvos emulsions shipped out of the factory meet the requirements of this standard. Each batch of dichlorvos emulsions shipped out of the factory shall be accompanied by a quality certificate in a certain format. 5.2 The user has the right to inspect whether the quality of the dichlorvos emulsions received meets the requirements of this standard in accordance with the provisions of this standard. 5.3 The amount of each batch of dichlorvos emulsions shall not exceed the capacity of the storage tank (or measuring tank) before packaging. The inspection batch number, production batch number and packaging batch number must be consistent.
54 Low temperature stability and heat storage stability shall be inspected at least once every six months, and other items shall be inspected. 5.5 Sampling method: Use a sampler to take samples from 5% of the total number of boxes in each batch, and the small batch sampling shall not be less than three boxes. Mix the samples taken and take no less than 200 samples and put them into living, dry and tightly ground glass bottles. Paste labels on the bottles, indicating: manufacturer name, product name, batch number and sampling date, and send them to the inspection department for inspection. 5.6 If one of the indicators in the test results does not meet the requirements of this standard, samples should be taken from twice the amount of packaging boxes for re-testing. In the results of the re-test, even if only one indicator does not meet the requirements of this standard, the entire batch of dichlorvos emulsifiable concentrate is unqualified. GB254B-93
5.7 When the supply and demand parties have disputes over product quality, they can be resolved through negotiation or the selected arbitration agency can conduct arbitration inspection using the methods specified in this standard.
6 Marking, packaging, transportation and storage
6-1 Each box and each bottle should be marked with: manufacturer name, product name, trademark, production batch number, net weight, production license number, pesticide registration number, this standard number and usage instructions and precautions (limited to bottle labels), and in accordance with the provisions of GB190, GB191GB4838, indicate the relevant signs.
6-2 Dichlorvos emulsion is prohibited from being packaged in general iron barrels. It should be packaged in clean and dry glass bottles and divided into 1kg and 0.5kg bottles as the main packaging units. The net mass of each bottle is allowed to fluctuate by ±2%, and the net mass of each box shall not be lower than the indicated mass. The bottles are lined with suitable materials such as straw covers and straw mats, and are tightly arranged in wooden boxes or calcium boxes. 6.3 Each batch of packaged finished products shall be accompanied by a quality certificate, which includes: the name of the manufacturer, product name, production batch number, ex-factory date, net mass, and the number of the product quality that meets the requirements of this standard. 6.4 During storage and transportation, strictly prevent moisture, heat and sunlight to keep good ventilation, and do not mix with food, seeds, and feed; avoid contact with skin and inhalation.
6-5 Under normal storage and transportation conditions, the warranty period of this product is two years. Within three months, the dichlorvos content should not be lower than the provisions of Article 3.2. Within one year, the content of dichlorvos should not be less than 73.5% and 45.5%, and the acidity should not be greater than 0.8%. Within two years, the content of dichlorvos should not be less than 72.0% and 44.0%, and the acidity should not be greater than 1.2%. Additional remarks:
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China, and the technical management is under the Shenyang Chemical Research Institute of the Ministry of Chemical Industry. This standard was drafted by Tianjin Pesticide General Factory. The main drafters of this standard are Xie Zaixiang, Han Lu, and Yang Jinlan. ..com
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