GB/T 8200-2019 in English

1. Overview of the Standard

GB/T 8200—2019 "Insecticide Soluble Agents" is an important standard issued by the State Administration for Market Regulation and the National Administration of Standardization, replacing the old version of GB/T 8200—2001. The standard mainly stipulates the requirements, test methods, acceptance rules, and marking, labeling, packaging, storage and transportation requirements for insecticide soluble agents.

Revision Background

With the development of agricultural technology, pesticide products need to be safer and more environmentally friendly. The revision of this standard introduces new control items, such as persistent foaming and dilution stability, reflecting the industry's attention to product quality and performance.

2. Key requirements

2.1 Appearance indicators

The soluble solution of mesotrione should be a homogeneous liquid without visible suspended matter and precipitation.

2.2 Comparison of technical indicators

3. Interpretation of core test methods

3.1 Determination of the mass fraction of chlorpyrifos

High performance liquid chromatography (HPLC) was used, with phosphate buffer as the mobile phase and a detection wavelength of 242nm. This method was quantitatively determined by the external standard method to ensure the accuracy of the results.

3.2 Determination of the mass fraction of sodium chloride

Using the silver titration method, nitric acid and hydrogen peroxide were added to destroy interfering substances, and ammonium ferric sulfate was used as an indicator, and sodium thiocyanate standard solution was used to titrate to light brown red.

3.3 Determination of the mass fraction of sodium thiosulfate

The iodine titration method was used, using starch as an indicator, to titrate free amine chloride in a non-aqueous medium.

4. Implementation Suggestions

4.1 Quality Control

• Strictly follow the sampling method specified in the standard to ensure sample representativeness.
• Establish a complete quality traceability system to record the test data and production information of each batch of products.

4.2 Packaging and Storage

Products should use moisture-proof and light-proof packaging materials. The storage environment should be kept ventilated and dry, avoiding high temperature and humidity.