For wettable powders, take 1 part of wettable powder, add 200 parts of water, and put it in a glass. Shake it for a certain period of time and observe the suspension. If the drug precipitates slowly, it indicates good suspension. In case of poor quality, silicone additives or 0.10% neutral laundry detergent should be added before use to increase the wet adhesion. If the wettable powder binds to a hard block, it should not be used as a spray.
If the old drug is a powder, if it absorbs moisture during the custody process, it needs to be placed in a cool and ventilated place to dry (do not use the sun). After crushed and used, if the agglomeration is serious, it can only be used as poisonous soil.
In the course of custody of emulsion pesticides, if the storage is poor, the following three conditions may occur. 1. Agglomeration phenomenon. If the emulsifiable concentrate has been a non-flowable viscous liquid or has formed a soapy solid, it is proved that the solvent has mostly volatilized and the quality has changed and cannot be used. 2. Precipitation crystallization phenomenon. For long-term storage of the emulsion, white crystals or turbid substances may appear on the bottom of the bottle. If the emulsion is immersed in a bottle of warm water at 30°C to 40°C, the crystals can be dissolved in about 30 minutes to return to a transparent liquid, indicating that the quality is good and can be used. If it does not dissolve, it indicates that the quality of the emulsifiable concentrate has changed and cannot be used. 3. Emulsifiable emulsifying properties change. Take 1 part of emulsifiable concentrate, add 200 parts of water, and place it in a glass. Shake well and stand for about half an hour. Observe the emulsification. If there is no slick in the upper layer, there will be no precipitate in the lower layer and no oil bead in the middle, indicating that the emulsification performance is good; There is emulsifiable concentrate on it and there is sedimentation. There is delamination after 10 minutes, indicating that the emulsion has been destroyed and cannot be used.
Anti-aging And Anti-wrinkle Raw Materials
Anti-Aging And Anti-Wrinkle Raw Materials,Skin Care,Bergen Acilarin Kadini,Hyaluronic Acid Serum
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