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1.悬浮法:鉴别可湿性粉剂,可取50克药粉倒入透明玻璃瓶中,加少量水调成糊状,再加入适量水搅拌均匀后观察,未变质的农药悬浮性好,发生沉淀慢而少;变质的沉淀快而多。2.观察法:粉剂或可湿性粉剂变潮结块明显,用手捏感到湿气重,用力捏捻成团,则表明已经失效。乳剂农药静置时出现油、水分层,或有沉淀、絮结,也基本失效。3.加热法;把有沉淀生成的液剂或乳剂农药连瓶放人热水中,待一小时后,沉淀物能缓慢溶化的为未
1. Suspension method: Identify wettable powder, preferably 50 grams of powder into a transparent glass bottle, add a small amount of water into a paste, then add the right amount of water Stir after observation, non-degenerate pesticide suspension is good, slow precipitation occurs Less; metamorphic sedimentation much faster. 2. Observation method: powder or wettable powder obvious tidal agglomeration, pinch felt heavy moisture, hard pinched into a group, it shows that has failed. Emulsions pesticides standing oil, water layer, or precipitation, flocculation, but also the basic failure. 3. Heating method; the precipitate generated by the liquid pesticide or emulsion bottle even placed in hot water, after an hour, the precipitate can slowly melt as