GB 22615-2008Clethodim emulsifiable concentrates (English PDF)

Foreword

The standard Chapter 3, Chapter 5 is mandatory, the rest are recommended.

Appendix A of this standard is the data appendix.

The standard proposed by China Petroleum and Chemical Industry Association.

This standard by the National Standardization Technical Committee on Pesticides (SAC/TC133) centralized.

1 Scope

This standard specifies the clethodim EC requirements, test methods and marking, labeling, packaging, storage and transportation.

This standard applies to the clethodim original drug and preparation of the emulsifier is dissolved in a suitable solvent clethodim 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/T 4472 chemical product density, relative density measurement General GB 4838 EC pesticide packaging GB/T 19136 Determination of Pesticide Thermal storage stability GB/T 19137 Pesticide cryogenic stability Determination

3 Requirements

5 Marking, labeling, packaging, storage and transportation

5.1 clethodim EC marking, labeling and packaging should comply with the provisions of GB 4838.

5.2 Bulk EC clethodim PU barrel net content of not more than 200kg. EC clethodim small package polyurethane bottle Packaging, bottle net weight 100g (mL), 200g (mL), 250g (mL), 500g (mL); overpack Plastic boxes or corrugated boxes, each Box net weight shall not exceed 15kg.

5.3 Other forms of packaging may be used according to user requirements or the order agreement, subject to the provisions of GB 4838.

5.4 clethodim EC packages should be stored in well-ventilated, dry, low temperature warehouse.

5.5 storage, prevent moisture and sunlight, no food, seed, feed mix, avoid contact with skin, eyes, mouth and nose to prevent inhalation.

5.6 Security. clethodim as low toxicity herbicides, the FDA should wear protective equipment, application after application, wash with soap, if swallowed, not reminders Spit, should be sent to the hospital immediately, according to the organic solvent (xylene) poisoning treatment therapy.

5.7 Warranty. under the specified storage conditions, clethodim EC guarantee, from date of manufacture for 2 years.

Appendix A

(Informative)

Clethodim mass fraction of phase high performance liquid chromatographic method A. 1 Method summary Sample with acetone petroleum ether was dissolved in acetonitrile + water + phosphoric acid as mobile phase to Nova-PakC18 use as filler and a stainless steel column UV detector (254nm), the sample of clethodim reverse phase high performance liquid chromatography, external standard.

A. 2 Reagents and solutions Acetonitrile. HPLC grade;

Water. The new secondary steam distilled water;

acetone;

Petroleum ether;

Phosphoric acid;

Acetone petroleum ether. [Psi] (acetone. petroleum ether) = 1;

Clethodim lithium salt standard. clethodim known lithium salt mass fraction >=98.0%.

A. 3 Instrument

High performance liquid chromatography. a variable wavelength UV detector;

Chromatographic data processor;

Column. 150mm × 4.6mm (. I.d) stainless steel column, built-Nova-PakC18,5µm filler (or with equivalent effect color the column);

Filter. pore size of about 0.45µm;

Micro injector. 50µL;

Quantitative sample line. 5µL;

Ultrasonic cleaner.

A. 4 RP-HPLC operating conditions Mobile phase. [Psi] (acetonitrile. water) = 65.35, wherein the water pH was adjusted to 3.0 with phosphoric acid, filtered through a filter membrane and degassed;

Flow rate. 1.0mL/min;

Column temperature. room temperature (temperature change should not exceed 2 °C);

Detection wavelength. 254nm;

Injection volume. 5µL;

Retention time. clethodim about 5.8min.

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 EC clethodim HPLC is shown in Figure A. 1.

1 --- clethodim.

Figure A. 1 clethodim EC by RP-HPLC Figure

A. 5 measuring step

A. 5.1 preparation of standard solution Weigh 0.1g clethodim lithium salt standard (accurate to 0.0002g), a 50mL volumetric flask, add 3 drops of glacial acetic acid and a small amount of acetone Petroleum ether solution was shaken to dissolve, dilute to the mark with acetone petroleum ether solution, shake. Using a pipette to take the above solution 5mL 50mL volumetric flask, dilute to the mark with petroleum ether, acetone, shake.

A. 5.2 Sample preparation solution Weigh 0.1g sample containing clethodim the (accurate to 0.0002g), a 50mL volumetric flask, dilute with acetone solution to petroleum ether Mark and shake. Using a pipette to take the above solution 5mL to 50mL volumetric flask, diluted with petroleum ether and acetone to the mark.

A. 5.3 Determination A. 6 Calculation the two needle sample solution and measured before and after the two doses of the standard sample solution clethodim peak areas are averaged. Sample clethodim the mass fraction of 1 (%) according to equation (A.1) calculations, clethodim mass concentration rho1 (g/L) according to equation (A.2) Calculated.

1 = A2

359.90

365.84

rho1 =

Where.

A1 --- the standard solution, the average peak area clethodim;

A2 --- sample solution, the average peak area clethodim;

Density rho --- 20 °C when the sample in grams per milliliter (g/mL) (according to GB/T 4472 measured);

--- Standard samples clethodim lithium salt mass fraction in%;

359.90 --- relative molecular mass clethodim;

Molecular Weight 365.84 --- clethodim lithium salt.

A. 7 allowable difference Two parallel determination results of the relative difference should be less than 4%, and the arithmetic mean as a measurement result.