GB/T 20686-2017 in English
VALIDGlyphosate water soluble powders(granules)
- Issued on:2017-05-31
- Implemented on:2017-12-01
- File Format:PDF
- Delivery:Via email within 5 business days
$301.00
《GB/T 20686-2017草甘膦可溶粉（粒）剂》由TC133（全国农药标准化技术委员会）归口，主管部门为农业农村部。
Introduction
Background of Standard Revision and Technological Evolution
GB/T 20686-2017 replaces the 2006 version of the standard. The main technical upgrades are reflected in:
| Revision content | 2006 version | 2017 version |
|---|---|---|
| Glyphosate content | Indicated value range | Specific limit |
| Cation control | Not specified | New sodium/potassium/ammonium plasma indicators |
| Nitrosoglyphosate | Not detected | ≤1.0mg/kg |
Analysis of core technical requirements
3.1 Composition and appearance requirements
The product must be made of glyphosate technical that meets the standards:
- Soluble powder: free-flowing powder
- Soluble granules: free-flowing granules
3.2 Comparison of key indicators
Take Sodium glyphosate soluble powder as an example:
| Item | 30% dosage form | 65% dosage form |
|---|---|---|
| Glyphosate content | 30.0±1.5% | 65.0±2.3% |
| Sodium ion content | ≤3.9% | ≤8.5% |
| Formaldehyde limit | ≤0.4g/kg | ≤0.8g/kg |
Abstract of detection method
4.4 Determination of glyphosate content
Arbitration method: Using Agilent ZORBAX SAX column, pH1.9 potassium dihydrogen phosphate-methanol mobile phase, 195nm UV detection, retention time of about 5.7min.
4.7 Detection of Nitrosoglyphosate
Derivatization-HPLC method:
- Derivatization with NED solution and sulfonamide solution
- React in a water bath at 85℃ for 25min
- Separate on C18 column, detect at 462nm
Implementation suggestions
Production process control
- Cation content, nitrosoglyphosate and other indicators must be tested every 3 months
- The hot storage stability test must ensure that the content retention rate is ≥95%
Packaging, storage and transportation specifications
Woven bags lined with plastic bags should be used for packaging, with a net content of 25kg/bag and a warranty period of 2 years. Storage must be moisture-proof and light-proof, and mixing with food is strictly prohibited.
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