GB/T 34156-2017 in English

National Standard of the People's Republic of China GB/T 34156—2017

Interpretation of the Standard for Pymetrozine Technical Material

1. Background and Significance of Standard Formulation

Pymetrozine is a highly effective and low-toxic insecticide widely used in agricultural production. In order to regulate its product quality and application safety and ensure the safety of agricultural production and the ecological environment, my country has issued the GB/T 34156—2017 "Pymetrozine Technical Material" standard. This standard clarifies the technical indicators, test methods and safety requirements of pymetrozine, providing a scientific basis for manufacturers and users.

2. Comparison of standard frameworks

3. Technical indicators and requirements

According to Table 1, the main technical indicators of pymetrozine technical include:

• Mass fraction of pymetrozine: ≥97.0%
• Dimethylformamide insoluble matter: ≤0.2%
• Loss on drying: ≤1.5%
• pH range: 6.0~9.0

4. Interpretation of experimental methods

The experimental methods in the standard include:

1. Identification test: High performance liquid chromatography and infrared spectroscopy.
2. Determination of mass fraction of pymetrozine: Dissolve the sample in methanol and separate it by reverse phase high performance liquid chromatography for quantitative analysis.
3. Determination of dimethylformamide insoluble matter: Refer to GB/T19138 method.

5. Implementation Suggestions

To ensure the effective implementation of the standard, it is recommended that:

• Manufacturers: Strictly follow the standard for quality control and establish a sound testing system.
• Users: Standardize storage and use to avoid direct contact with the human body.
• Regulatory authorities: Strengthen market supervision to ensure that product quality meets the standard requirements.