GB 23558-2009 English PDF

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GB 23558-2009: [GB/T 23558-2009] Bensulfuron-methyl wettable powders
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB 23558-2009	259	Add to Cart	3 days	[GB/T 23558-2009] Bensulfuron-methyl wettable powders	Valid

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Basic data

Standard ID: GB 23558-2009 (GB23558-2009)
Description (Translated English): [GB/T 23558-2009] Bensulfuron-methyl wettable powders
Sector / Industry: National Standard
Classification of Chinese Standard: G25
Classification of International Standard: 65.100.20
Word Count Estimation: 10,187
Date of Issue: 2009-04-27
Date of Implementation: 2009-11-01
Adopted Standard: FAO 502/WP-2002, MOD
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 Bensulfuron WP requirements, test methods and marking, labeling, packaging, storage and transportation. This standard applies to Bensulfuron original drug, suitable additives and fillers from the processing Bensulfuron WP.

GB 23558-2009: [GB/T 23558-2009] Bensulfuron-methyl wettable powders

---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.
Bensulfuron-methyl wettable powders ICS 65.100.20 G25 National Standards of People's Republic of China Bensulfuron WP Published 2009-04-27 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China issued

Foreword

This standard in Chapter 3, Section 5 is mandatory, the rest are recommended. This modification uses standard FAO Specification 502/WP (2002) "bensulfuron WP" (Bensulfuron-methylwettable powders). This standard modification method using foreign advanced standards for the redrafted law. This standard FAO Specifications "bensulfuron WP" (Bensulfuron-methyltechnical) the main technical differences. --- This standard specifies the moisture index, FAO specifications not control the indicators; --- This standard specifies a pH range of indicators, FAO specifications of the indicators is not controlled; --- This standard suspension rate ≥75%, FAO predetermined suspension rate ≥60%; This standard specifies --- wetting time ≤90s, FAO predetermined wetting time ≤ 60s; --- FAO specifications prescribed lasting foam volume indicators, this standard does not control the indicators. The standard proposed by China Petroleum and Chemical Industry Association. This standard by the National Pesticide Standardization Technical Committee (SAC/TC133). This standard is drafted. Shenyang Chemical Research Institute. Participated in the drafting of this standard. Jiangsu Institute of hormones Ltd., Jiangsu Qantas Agrochemical Co., Ltd., Jiangsu dragon Chemical Co., Ltd. The main drafters. Jiang Minyi, Xing Jun, Fan Lei, Chen Jie, Feng Xiuzhen. Bensulfuron WP The product names of other active ingredients benzyl ethyl structural formula and basic physicochemical parameters are as follows. ISO common name. bensulfuron-methyl CAS Registry Number. 83055-99-6 CIPAC Numeric Code. 502 Chemical Name. 3- (4,6-dimethoxypyrimidin-2-yl) -1- (2-methoxy-formyl-benzyl) sulfonylurea Structure. Empirical formula. C16H18N4O7S Molecular weight. 410.4 (according to 2005 international relative atomic mass) Biological activity. weeding Melting point. about 185 ℃ ~ 188 ℃ Vapor pressure (25 ℃). 2.8mPa Solubility (20 ℃, g/L). 1.38 acetone; acetonitrile, 5.38; 11.7 dichloromethane; ethyl acetate 1.66; hexane 0.31; Xylene 0.28; water 2.9mg/L (25 ℃, pH5), 120mg/L (25 ℃, pH7) Stability. slightly alkaline (pH 8) aqueous solution of steady, slowly decompose in aqueous solution slightly acidic, DT5011d (pH5), 143d (PH7) Range 1 This standard specifies the requirements bensulfuron wettable powder, Test Method for marking, labeling, packaging, storage and transportation. This standard applies to bensulfuron by the original drug, suitable additives and fillers processing of bensulfuron-methyl wettable powder.

2 Normative references

Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard Whether the latest versions of these documents. For undated references, the latest version applies to this standard. GB/T 1600 Pesticide Method Moisture Determination 1601 pH value pesticides GB/T GB/T 1604 pesticide regulations for acceptance of goods GB/T 1605-2001 sampling commercial pesticides GB 3796 pesticide packaging General GB/T 5451 method for measuring the wettability of agrochemical wettable GB/T 14825-2006 Method for determination of pesticide suspension GB/T 16150 pesticide powders, wettable powder fineness measurement method GB T 19136 Determination of heat storage stability of pesticide / 3.1 Composition and appearance This product should be compliant bensulfuron the drug and appropriate processing auxiliaries and fillers are made as loose powder uniformly, there should be Clumps. 3.2 Technical Specifications Bensulfuron WP shall comply with the requirements of Table 1. Table 1 bensulfuron WP Quality Control Project Index project index 10% 30% Bensulfuron mass fraction /% 10.0 30.0 + 1.0 to 1.0 + 1.5-1.5 Moisture /% ≤ 3.0 The pH range of 6 to 9 Suspension rate /% ≥ 75 Wetting time/s ≤ 90 Fineness (45μm test sieve) /% ≥ 98 Passing a heat storage stability test When a normal production, the thermal storage stability test was measured at least once every three months. Test Method 4 4.1 Sampling Carried out in GB/T 1605-2001 of "solid preparation sampling" approach. Determining Sample packages with a random number table method; final sample size Not less than 300g. 4.2 Identification Test The present liquid chromatography --- identification test can be carried out simultaneously with the measurement bensulfuron mass fraction. Chromatography under the same operating conditions, Sample solution of a chromatographic peak with a retention time of the standard solution of the benzyl peak retention time of ethyl, relative difference which should 1.5% or less. 4.3 Determination of bensulfuron mass fraction 4.3.1 Method summary Sample solution was dissolved in methanol with ammonia, acetonitrile + water + acetic acid as the mobile phase, used as a filler stainless μBondapakC18 Column and a UV detector (235nm), bensulfuron sample of metsulfuron and high performance liquid chromatography assay. 4.3.2 Reagents and solutions Glacial acetic acid; Acetonitrile. HPLC grade; Water. The new secondary steam distilled water; Ammonia. (NH3) = 26% ~ 30%; Ammonia solution. [Phi] (ammonia. water) = 1.300; Ammonia in methanol. [Phi] (ammonia solution. methanol) = 1.4; Bensulfuron Sample. bensulfuron known mass fraction ≥98.0%. 4.3.3 Instruments HPLC. a variable wavelength UV detector; Chromatographic data processor; Column. 150mm × 4.6mm (i.d.) Stainless steel column, μBondapakC185μm filler contents (or equivalent effect column); Filter. membrane pore size of about 0.45 m; Microsyringe. 50μL; Quantitative sampling tube. 5μL; Ultrasonic cleaning. 4.3.4 HPLC operating conditions Mobile phase. φ (CH3CN.H2O.CH3COOH) = 50.50.0.16; Flow rate. 1.0mL/min; Column temperature. room temperature (temperature change should be less than 2 deg.] C); Detection wavelength. 235nm; Injection Volume. 5μL; Retention time. bensulfuron about 4.6min. Are typical operating parameters of the above, according to the characteristics of different instruments, for a given operating parameters appropriately adjusted to obtain the best result. Typical wettable powders bensulfuron HPLC is shown in Figure 1. 1 --- bensulfuron. Figure 1 HPLC bensulfuron Wettable Powder 4.3.5 Determination Step 4.3.5.1 Preparation of standard solution Weigh 0.05g bensulfuron standard (accurate to 0.0002g), a 100mL volumetric flask, dilute to the mark with methanolic ammonia Degrees, to dissolve the sample ultrasonic vibration 5min, cooled to room temperature, shaking. 4.3.5.2 Preparation of sample solution Weigh a sample containing 0.05g of bensulfuron methyl (accurate to 0.0002g), a 100mL volumetric flask, and diluted with methanolic ammonia To the mark to dissolve the sample ultrasonic vibration 5min, cooled to room temperature, shaken and filtered. 4.3.5.3 Determination Under the above operating conditions, after the instrument is stable, the number of consecutive doses of the standard solution is injected until the two adjacent needles bensulfuron peak area becomes relatively After less than 1.2% of, measured according to the standard solution, sample solution, the sample solution, the order of standard solution. 4.3.6 computing The mass fraction of the sample bensulfuron 1 (%), according to equation (1). 1 = A2 (1) Where. A1 --- the standard solution, bensulfuron average peak area; A2 --- sample solution, bensulfuron average peak area; --- mass fraction of bensulfuron standard, expressed in%. 4.3.7 allows poor Two parallel determination result of the difference, 30% wettable powder should be less than 0.5%, 10% wettable powder should be not more than 0.3% were taken Arithmetic mean value thereof as a measurement result. 4.4 Determination of Moisture According to GB/T 1600 in the "azeotropic distillation method". Carried out in GB/T 1601. 4.6 Determination of the suspension rate Proceed as GB/T 14825-2006 4.1. Weigh a sample containing 0.1g of bensulfuron methyl (accurate to 0.0002g), the cylinder bottom All portions 25mL suspension was transferred to a 100mL flask with ammonia in methanol to volume, shaken at 3min ultrasound, static Set, after filtration, was measured according to 4.3.1 bensulfuron mass, suspension rate calculated. 4.7 Determination of wetting time Carried out in GB/T 5451. 4.8 Determination of fineness According to GB/T 16150 in the "wet sieve method". Thermal storage stability test 4.9 According to GB/T 19136 of "powder formulation" performed. After the heat storage mass fraction bensulfuron reservoir should be greater than before bensulfuron mass fraction 97% suspension rate should meet the standards. 4.10 product inspection and acceptance Product inspection and acceptance shall comply with GB/T 1604's. Process limit values using rounding value comparison method. 5 marking, labeling, packaging, storage and transportation 5.1 bensulfuron flag WP, labeling and packaging should comply with the provisions of GB 3796. 5.2 bensulfuron WP application woven bag lined with clean plastic bag or cardboard drum lined with clean plastic bag, net weight per carton Generally no more than 20kg. The user may also request or order protocol, other forms of packaging, subject to the provisions of GB 3796. 5.3 bensulfuron WP package airiness, dry place. 5.4 storage and transportation to prevent moisture and sunlight, no food, seed, feed mix, avoid contact with skin, eyes, nose and mouth to prevent inhalation. 5.5 Security. This is a low-toxic herbicide. Are swallowed and inhaled toxic, it can penetrate through the skin. When using this to avoid contact with the skin, application After the drug with soap and rinse with water. Poisoning should immediately sent to hospital for symptomatic treatment. 5.6 Warranty. Under the provisions of storage and transportation conditions, bensulfuron WP warranty period from the date of manufacture 2 years. ......

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