GB/T 18172.1-2000 in English

Technical background and application of Chlorothalonil smoke powder granules

Chlorothalonil smoke powder granules is a highly effective fungicide, mainly used to prevent and control fungal diseases of crops. Its main ingredient Chlorothalonil has a broad-spectrum fungicide performance and has excellent control effects on a variety of plant diseases.

Background and significance of standard formulation

The formulation of GB 18172.1-2000 is based on the development needs of the domestic pesticide industry and combined with international advanced experience. The standard was issued in 2000 and became a recommended standard (GB/T 18172.1-2000) in 2017, but it is still an important reference.

Technical indicators of chlorothalonil smoke powder granules

• Active ingredient content: The content of chlorothalonil directly affects the bactericidal effect of the product and must be strictly controlled within the standard range.
• Limit of hexachlorobenzene content: This impurity is potentially toxic and its residual content must be controlled to not exceed 0.01%.
• Ignition test and combustion performance: Smoke powder granules must have good ignition and stable combustion and smoke time (2.0 to 10.0 minutes) to ensure reliability in practical applications.

Detailed explanation of test methods

The standard stipulates a number of test indicators, including content determination, hexachlorobenzene residue analysis, heating loss, pH value, fineness, etc. For example:

Gas chromatography to determine the content of thiophanate-methyl

This method uses high performance liquid chromatography separation and hydrogen flame ionization detector (FID) quantitative analysis to ensure the accuracy of the results. The standard specifies detailed chromatographic operating conditions and data processing procedures.

Implementation recommendations and precautions

1. Production process: Strictly control the quality of raw materials in accordance with standard requirements to ensure that all indicators meet the requirements.
2. Storage and transportation: The product should be stored in a ventilated and dry environment to avoid high temperature and humidity. The packaging should be prevented from being damaged during transportation.
3. Usage recommendations: In actual applications, it is recommended that users adjust the application amount according to the type of crop and the degree of disease, and pay attention to personal protection measures.