GB 22608-2008Atrazine suspension 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.

Since the implementation of this standard, the original industry standard HG2204-1991 "Atrazine SC" void.

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 atrazine suspension of requirements, test methods and marking, labeling, packaging, storage and transportation.

This standard applies to the herbicide atrazine original medicines, additives and carriers from the processing of atrazine suspension.

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.

Determination of GB/T 1601 Pesticides pH value GB/T 1604 Goods pesticide regulations for acceptance GB/T 1605-2001 Sampling Method commercial pesticides GB 3796 pesticide packaging General GB/T 4472 chemical product density, relative density measurement General GB/T 14825 method for determination of pesticide wettable powder suspension GB/T 16150 pesticide powder, wettable powder fineness measurement method 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 be compliant atrazine original medicines, additives and fillers processing, the appearance should be flowing and easy to measure body Volume of liquid suspension; precipitation may occur during storage, handling shaken but should restitution; there should be no lumps.

3.2 atrazine suspension shall comply with the requirements in Table 1.

Table 1 Atrazine SC Control Project Index

project

index

38% 500g/L 50%

Atrazine mass fraction /% or concentration of a (20 °C) / (g/L) 38.0 + 2.0-2.0 45.0 + 2.0-2.0 + 20-20 500 50.0 + 2.0-2.0 Suspension rate /% >= 90 pH range 6.0 to 10.0 Wet sieve test (through 45µm test sieve) /% >= 98 Persistent amount of foam (1min after)/mL <= 40 Pourability b After pouring the mass fraction residue /% <= 5.0 After washing the mass fraction of residue /% <= 0.5 Low temperature stability Qualified b Thermal storage stability b qualified in atrazine mass fraction of arbitration when a dispute occurs when the quality.

b dumped, low-temperature stability, thermal storage stability test under normal production conditions, every 3 months test at least once.

Test Method 4

5 Marking, labeling, packaging, storage and transportation

5.1 atrazine suspension of marking, labeling and packaging should comply with the relevant provisions of GB 3796.

5.2 Atrazine SC can be used polyester bottles with corks and bottle caps, bottle 100g, 500g, 1000g closely arranged in Gaisu Box, carton or wooden box. According to user requirements or orders protocol, you can use other forms of packaging, it shall comply with the relevant GB 3796 Provisions.

5.3 orders according to user requirements or protocols may use other forms of packaging, it should comply with the relevant provisions of GB 3796.

5.4 The package should be stored in ventilated, dry coffers.

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. Atrazine SC low toxicity herbicides, eyes, skin have a stimulating effect, are swallowed or inhaled toxic. Use this Product should wear protective gloves with clean protective clothing. After application, immediately wash with soap and water, if the issues wrongly, or other causes of poisoning now Like, you should consult a doctor.

5.7 Warranty. under the specified storage conditions, atrazine suspension of the guarantee period from the date of production for two years.

Appendix A

(Informative)

Atrazine quality gas chromatographic method scores packed column A. 1 Method summary Sample was dissolved in chloroform to triadimefon as internal standard, using polyethylene glycol 20M/GasChromQ filling column and hydrogen fire Flame ionization detector, a sample with atrazine gas chromatographic separation and determination.

A. 2 Reagents and solutions Chloroform;

Triadimefon. >=95%, free of impurities interference analyzes;

Atrazine Sample. Atrazine is known mass fraction >=99.0%;

Internal standard solution. Weigh 10.0g of triadimefon, placed 1000mL volumetric flask with chloroform to dissolve and dilute to volume, shake.

A. 3 Instrument

Gas chromatograph. with a hydrogen flame ionization detector;

Column. 3% polyethylene glycol 20M/GasChromQ (80 mesh to 100 mesh) stainless steel column (column or glass).

A. 4 GC operating conditions Temperature (°C). Column temperature 200 ± 5, the gasification chamber 230, the detector chamber 230;

Gas flow rate (mL/min). carrier gas (N2) 80.0, the hydrogen gas 40, air 400;

Injection volume (µL). 1.0;

Retention time (min). atrazine about 4.6, about 7.4 internal standard.

GC operating conditions described above, the Department of typical operating parameters. According to the characteristics of different instruments, given operating parameters adjusted as appropriate, in order to obtain the best results. Typical atrazine suspension and the internal standard packed column gas chromatography is shown in Figure A. 1.

1 --- atrazine;

2 --- internal standard (triadimefon).

Figure A. 1 atrazine suspension and the internal standard packed column gas chromatogram

A. 5 measuring step

A. 5.1 preparation of standard solution Weigh atrazine standard 0.1g (accurate to 0.0002g), placed in 15mL stoppered glass bottle with a pipette moved 10mL internal standard Solution, shake.

A. 5.2 Sample preparation solution Weigh about containing herbicide atrazine 0.1g sample of (accurate to 0.0002g), placed in 15mL stoppered glass vial, with A. 5.1 used with a pipetted into internal standard solution 10mL, shake.

A. 5.3 Determination Under these operating conditions, the instrument until a stable baseline, the number of continuous injection doses of the standard solution, calculated for each needle atrazine and the internal standard peak area when the ratio of repeatability, two needles herbicide atrazine to be adjacent to the internal standard peak area ratio of the relative change of less than 1.5%, according to the standard solution, sample Solution, sample solution, the order of the standard solution was measured.

A. 6 Calculation

The peak area of the two-pin and the sample solution is measured before and after the two doses of the standard sample solution atrazine and internal standard ratios are averaged.

Atrazine sample mass fraction of 1 (%) according to equation (A.1) to calculate the mass concentration rho1 [g/L (20 °C)] according to equation (A.2) Calculated.

rho1 =

10 (A.2)

Where.

--- Atrazine standard mass fraction, expressed as a percentage;

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

A. 7 allowable difference the difference between two parallel determination results shall not be greater than 1.0%, the arithmetic mean value as a measurement result.