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振荡法 用于检查乳剂农药,看药瓶里的药液有无分层现象,如已有分层,即上层是油质,下层是沉淀物,可摇振均匀静放一小时,如仍然分层,说明农药变质失效。 兑水法 取乳剂农药少许,兑水1—2倍,搅拌后静放2小时,若水面无浮油层即表明没有变质,反之则为劣质农药。 加热法 将出现沉淀的乳剂农药连瓶放在40℃以上的热水里浸泡一小时,如果药瓶内的沉淀物未消失,表明农药失效。
Oscillating method is used to check the emulsion pesticides to see whether there is stratification of the liquid medicine bottle, such as stratification, that is, the upper is oily, the lower is a precipitate that can shake evenly static for an hour, as still points Layer, indicating deterioration of pesticide failure. With the water law to take a small amount of emulsion pesticides, watered 1-2 times, after standing for 2 hours stirring, if there is no surface layer of oil that no deterioration, otherwise it is inferior pesticides. Heating method will appear precipitated emulsion pesticides even bottle placed in hot water above 40 ℃ soak for an hour, if the bottle of sediment did not disappear, indicating pesticide failure.