GB/T 20694-2019 in English
VALIDEmamectin benzoate emulsifiable concentrates
- Issued on:2019-10-18
- Implemented on:2020-05-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
Introduction
In-depth interpretation of GB/T 20694—2019, the national standard of the People's Republic of China
Analysis of the background of standard formulation and technological evolution
GB/T 20694—2019 is a revision of GB/T 20694—2006, mainly based on the following considerations:
- Adapting to changes in market demand: A new control item for the mass fraction of emamectin benzoate has been added.
- Technological progress: The detection method has been optimized, and high-performance liquid chromatography (HPLC) has been introduced to improve the measurement accuracy.
- Improved product stability requirements: New indicators such as persistent foaming have been added to ensure the long-term stable use of emulsifiable concentrate products.
| Standard comparison dimensions | |||||
| Items | Indicator changes | Background description | |||
|---|---|---|---|---|---|
| 0.6% | 1.1% | 2.3% | 5.7% | ||
| Mass fraction of avermectin benzoate | 0.6±8:1 | 1.1±8:2 | 2.3±8.3 | 5.7±8.6 | New items are added to ensure product quality consistency. |
| 0.5±8:1 | 1.0±8:15 | 2.0±8:3 | 5.0±8:5 | Compared with the old standard, the accuracy requirement is improved. | |
Technical Indicators of Emamectin Benzoate EC
High Performance Liquid Chromatography (HPLC) is the core detection method of this standard, especially playing a key role in identification test and mass fraction determination. The following is a specific indicator comparison:
Application case analysis
A pesticide manufacturer adopted the GB/T 20694-2019 standard to conduct a full-item test on the emamectin benzoate emulsifiable concentrate it produced. The results showed:
- The pH value was controlled at 5.8 (in line with the requirements of 4.0~7.5).
- The persistent foaming test was 60 mL/min, which met the qualified requirements.
- The volume of solid precipitated in the low-temperature stability test did not exceed 0.2 mL (in line with the requirements of ≤0.3 mL).
Implementation Suggestions and Precautions
To ensure the effective implementation of the standard, it is recommended to:
- Strengthen staff training: especially for HPLC operation and data analysis personnel.
- Improve laboratory equipment: equipped with advanced chromatographs and temperature control systems.
- Regular quality audits: ensure the accuracy and consistency of test data.
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