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GB 23557-2009: Methomyl emulsifiable concentrates
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Methomyl emulsifiable concentrates
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GB 23557-2009
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Basic data | Standard ID | GB 23557-2009 (GB23557-2009) | | Description (Translated English) | Methomyl emulsifiable concentrates | | Sector / Industry | National Standard | | Classification of Chinese Standard | G25 | | Classification of International Standard | 65.100.10 | | Word Count Estimation | 8,829 | | Date of Issue | 2009-04-27 | | Date of Implementation | 2009-11-01 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 5, 2009 (No. 145 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Chinese standard specifies the methomyl EC requirements, test methods and marking, labeling, packaging, storage and transportation. This standard applies to Methomyl drug dissolved in a suitable solvent and emulsifier in the preparation of methomyl EC. | GB 23557-2009: Methomyl emulsifiable concentrates---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methomyl emulsifiable concentrates
ICS 65.100.10
G25
National Standards of People's Republic of China
Methomyl EC
Posted 2009-04-27
2009-11-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
The standard Chapter 3, Chapter 5 are mandatory, the rest are recommended.
Since the implementation of this standard, the original chemical industry standard HG2612-1994 "20% Methomyl EC" void.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the National Standardization Technical Committee on Pesticides (SAC/TC133) centralized.
This standard is drafted by. Shenyang Chemical Research Institute.
Participated in the drafting of this standard. Haili Guixi Chemical Pesticide Co., Pesticide Research Institute in Shandong Province, Jiangsu dragon Chemical Co., Ltd., Jiangsu
Su Yancheng Limin Chemical Co., Ltd.
The main drafters of this standard. Zhao Xin, Li Xiujie, Running an, Lidong Qin, of cloud point, Wei Hongsheng.
Methomyl EC
Other name, structural formula and basic physicochemical parameters of the active ingredient product of methomyl as follows.
ISO common name. methomyl
CIPAC digital code. 264
Chemical name. S- methyl-N - [(methylcarbamoyl) oxy] thioacetate imidate
Structure.
Empirical formula. C5H10N2O2S
Molecular weight. 162.20 (according to 2005 international relative atomic mass)
Biological activity. Insecticidal
Melting point. 78 ℃ ~ 79 ℃
Vapor pressure (25 ℃). 0.72mPa
Solubility (g/L, 25 ℃). 58 water; Methanol 1000; 730 acetone; Ethanol 420
Stability. At room temperature, an aqueous solution decomposes slowly in the sunlight, exposure to air and alkaline medium decomposition speed
1 Scope
This standard specifies the methomyl EC requirements, test methods and marking, labeling, packaging, storage and transportation.
This standard applies to the original drug methomyl and preparation of the emulsifier is dissolved in a suitable solvent Methomyl EC.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 1600 Determination of Water Pesticides
Determination of GB/T 1601 Pesticides pH value
GB/T 1603 Determination of emulsion stability of pesticide
GB/T 1604 Goods pesticide regulations for acceptance
GB/T 1605-2001 Sampling Method commercial pesticides
GB 4838 EC pesticide packaging
GB/T 19136 Determination of Pesticide Thermal storage stability
GB/T 19137 Pesticide cryogenic stability Determination
3 Requirements
3.1 Composition and appearance
This product should meet the standards of the original drug methomyl made homogeneous oily liquid without visible suspended matter and sediment.
3.2 Technical Specifications
Methomyl EC shall comply with the requirements of Table 1.
Table 1 Methomyl EC Control Project Index
project
index
20% 40%
Methomyl mass fraction /% 20.0 + 40.0 + 2.0-2.0 1.2-1.2
Moisture /% ≤ 1.0
pH range of 5.0 to 8.0
Emulsion stability (diluted 200 times) Qualified
Low temperature stability a qualified
Thermal storage stability of a qualified
a low temperature stability test, the thermal storage stability tests at normal production, at least every three months, once detected.
Test Method 4
4.1 Sampling
According to GB/T 1605-2001 in "liquid formulations sampling" approach. Determined by sampling a random number table method packages, the final sample size
Not less than 200mL.
4.2 Identification Test
Liquid chromatography --- The identification test can be carried out simultaneously with the determination of the mass fraction of methomyl. Under the same chromatographic operating conditions, the test
The retention time of the sample solution and the standard solution to a peak of methomyl retention time, the relative difference should be less than 1.5%.
4.3 Determination of the mass fraction of methomyl
4.3.1 Method summary
Sample was dissolved in methanol, methanol + water as the mobile phase, to use as filler SpherisorbC8 stainless steel column and UV detector
(235nm), the sample of methomyl reverse phase HPLC separation and determination.
4.3.2 Reagents and solutions
Methanol. HPLC grade;
Water. The new secondary steam distilled water;
Methomyl Standard. Known methomyl mass fraction ≥99.0%.
4.3.3 Instruments
High performance liquid chromatography. a variable wavelength UV detector;
Chromatographic data processor or chromatography workstation;
Column.200mm × 4.6mm (. I.d) stainless steel column SpherisorbC8,10μm filler contents (or with equivalent effect
C8, C18 bonded phase);
Filter. filter pore size of about 0.45μm;
Micro injector. 50μL;
Quantitative sample line. 5μL;
Ultrasonic cleaner.
4.3.4 HPLC operating conditions
Mobile phase. φ (methanol. water) = 40.60, by membrane filtration, and degassing;
Flow rate. 1.0mL/min;
Column temperature. room temperature (temperature change should not exceed 2 ℃);
Detection wavelength. 235nm;
Injection volume. 5μL;
Retention time. Methomyl about 4.1min.
It said operating parameters are typical, according to the characteristics of different instruments, given operating parameters adjusted as appropriate, in order to obtain the best results.
Typical methomyl EC HPLC is shown in Figure 1.
1 --- methomyl.
Figure 1 methomyl EC HPLC diagram
4.3.5 measuring step
4.3.5.1 Preparation of standard solution
Weigh methomyl standard 0.10g (accurate to 0.0002g), a 50mL volumetric flask, diluted with methanol to the mark. accurate
Pipette the solution 10mL in 50mL volumetric flask, diluted with methanol to the mark.
4.3.5.2 Preparation of sample solution
Weigh containing methomyl EC about 0.10g of the sample (accurate to 0.0002g), a 50mL volumetric flask, diluted with methanol to the mark
Degree, shake. Pipette accurately above solution 10mL in 50mL volumetric flask, diluted with methanol to the mark.
4.3.5.3 Determination
Under these operating conditions, after the instrument is stable, continuous injection of several doses of the standard solution until the two adjacent needles methomyl peak area relative change
After less than 1.5%, according to the solution, sample solution, sample solution, standard order of standard solution was measured.
4.3.6 Calculation
The two needle sample solution and measured before and after the two doses of the standard sample solution Methomyl peak areas are averaged. Sample methomyl
The mass fraction of 1 (%), according to equation (1).
1 = A2
(1)
Where.
A1 --- the standard solution, the average methomyl peak area;
A2 --- sample solution, the average methomyl peak area;
Book GB 23557-2009
--- Methomyl standard mass fraction, expressed as a percentage.
4.3.7 allowable difference
Difference methomyl content of two parallel determination results shall not be greater than 0.5%, the arithmetic mean value as a measurement result.
4.4 Determination of Moisture
According to GB/T 1600 the "Karl Fischer method".
According to GB/T 1601 carried out.
4.6 Emulsion stability test
Standard hard water sample was diluted 200-fold, according to GB/T 1603 test, the non-oil slick, no precipitation under qualified.
4.7 Low temperature stability test
According to GB/T 19137 in "homogeneous emulsion and liquid preparations", in the bottom of the centrifuge tube educt volume does not exceed 0.3mL qualified.
4.8 Thermal storage stability test
According to GB/T 19136 in "liquid formulation" to. After the thermal storage, methomyl content should not be lower than the measured thermal storage mass fraction ago
95% emulsion stability should continue to meet the standards.
4.9 product testing and acceptance
Shall comply with GB/T 1604's. Limit the use of numerical treatment rounding value comparison method.
5 marking, labeling, packaging, storage and transportation
5.1 methomyl EC marking, labeling and packaging should comply with the provisions of GB 4838.
5.2 methomyl EC application with inner and outer cover of glass or plastic bottles 250mL or 500mL of corrugated packaging with a plastic box or
Carton, net weight shall not exceed 15kg. According to user requirements or ordering protocols use other forms of packaging, subject to
The provisions of GB 4838.
5.3 methomyl EC packages should be stored in well-ventilated, dry coffers.
5.4 storage, prevent moisture and sunlight, no food, seed, feed mix, avoid contact with skin, eyes, mouth and nose to prevent inhalation.
5.5 Security. in the instruction manual or on the container, in addition to the corresponding signs of toxicity, there should be related toxicity following instructions.
Methomyl is highly toxic carbamate pesticides, toxic inhalation, eating can be deadly. The FDA should avoid direct contact with skin and eyes
Touch, Do not breathe dust and spray. All operations should be carried out in the ventilation, and to take appropriate skin and eye protection measures in case of contact,
5.6 Warranty. under the specified storage conditions, warranties of methomyl EC from date of manufacture for 2 years.
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