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一、乳油的鉴别 1、振荡法。先看瓶中的乳油有无分层现象。如果已有分层并出现上面乳油下面沉淀,说明乳化性能已经降低,将此瓶中农药用力振荡均匀,如果自然分层,说明农药已经变质。 2、静置脱水法。取清水1千克,放在透明玻璃瓶中,轻轻加入1毫升被检验的乳油农药。乳化性能好的乳油农药迅速呈放射状向四周扩散。静置12小时后,水面无浮油,水底无沉淀,呈乳白色悬浊液,且均匀一致。已变质的乳油农药加入水中时向四周扩散速度较慢,静
First, the identification of EC 1, oscillation method. Look at the bottle of the cream with or without stratification. If there is stratification and precipitation above the EC appears, indicating that the emulsifying properties have been reduced, the bottle of pesticides forced oscillation evenly, if the natural stratification, indicating that the pesticide has been deteriorated. 2, standing dehydration method. Take 1 kg of water, placed in a clear glass bottle, gently add 1 ml of emulsified pesticide was tested. Good emulsion emulsifiable concentrate pesticide quickly spread to the surrounding radial. After standing for 12 hours, there was no oil slick on the water surface, no sediment on the water bottom, milky white suspension and uniform. Degraded EC emulsifier spreads slowly and quietly to the surrounding water