First, the observation method: For powder pesticides , first look at the appearance of the drug, if it has been obviously wetted, the drug taste is not strong or have other odors, and can be smashed into a group by hand, indicating that it has basically failed; for emulsion pesticides, first the bottle Allow to stand, if the liquid is turbid or stratified (ie, oil-water separation), there is sediment formation or flocculation, indicating that the agent may have failed.
Second, the heating method: take 5 to 10 grams of pesticides, put on a piece of metal to heat, if a large amount of white smoke, and a strong pungent smell, indicating that the agent is good, otherwise, the description has expired.
Third, the floating method: identification of wettable powder pesticides. Take a cup of 200g of water and sprinkle 1g of pesticide on the surface of the water gently and evenly. Observe carefully: It is moisturized and soluble in water within 1 minute, indicating that it is a pesticide that has not expired, otherwise it is a pesticide. It is also possible to take 30-50 grams of pesticides, put them in a glass container, first add a small amount of water to make a paste, then add 150-200 grams of water to mix well, and let stand for 10 minutes to observe, wherein the pesticides that have not failed are well soluble, the liquid The suspended particles in the medium are fine, the sedimentation rate is slow and the amount of sedimentation is small, and the pesticide is reversed.
Fourth, the dilution method: identification of emulsion pesticides. Take 50 grams of pesticide, put it in a glass bottle, add 150 grams of water, shake it vigorously and let it stand for 30 minutes. If the liquid is uniform milky white, and there is no oil on the oil, there is no precipitation, indicating that the agent is good, otherwise it is a pesticide. And the more the upper layer of oil, the worse the drug.
The article was published by China Pesticide Network !
Here you can find the related products in Turbine Flow Meter, we are professional manufacturer of Turbine Flow Meter,Turbine Meter,Turbine Type Flow Meter,Electronic Turbine Meter. We focused on international export product development, production and sales. We have improved quality control processes of Turbine Flow Meter to ensure each export qualified product.
If you want to know more about the products in Turbine Flow Meter, please click the product details to view parameters, models, pictures, prices and other information about Turbine Flow Meter,Turbine Meter,Turbine Type Flow Meter,Electronic Turbine Meter.
Whatever you are a group or individual, we will do our best to provide you with accurate and comprehensive message about Turbine Flow Meter!
Turbine Flow Meter,Turbine Meter,Turbine Type Flow Meter,Electronic Turbine Meter
Xi'an Gavin Electronic Technology Co., Ltd , https://www.gaimcmeaso.com