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1.粉剂 可观察其外表及受潮结块情况,如变色,药味不浓或有霉酸异味。则初步说明该药已失效。进一步检测,取原粉50克放在透明器皿内,加入少量水搅拌,成糊状后再加5倍清水,再次搅拌,尔后,静置数分钟后观察。如药液粉粒沉淀少且慢,粉粒细散,则农药还有效;如沉淀快而多,粉粒大、粗,组成小团,说明该药已失效。
1. Powder can be observed its appearance and damp caking conditions, such as discoloration, drug concentration is not strong or a sour smell. The initial indication that the drug has lapsed. Further testing, take the original powder 50 grams on a transparent vessel, add a small amount of water, stir, add 5 times after the paste into the water, stirring again, and then, after standing for a few minutes to observe. If the liquid powder precipitation less and slow, fine powder scattered, the pesticide is also valid; such as sedimentation quick and more, large particles, coarse, composed of small groups, indicating that the drug has lapsed.