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Pesticide testing methods and principles
Date: 2020-11-24Read: 5
Any crop we have now is susceptible to pests and diseases during its growth process, which requires us to use pesticide spraying for management. Pesticides ensure the growth of various crops necessary for our daily lives, but only a portion of these pesticides are used to prevent and control pests and diseases. The rest enter the crops and remain, while others enter the natural environment, causing damage to the ecosystem. From the perspective of personal health and human development, controlling pesticide use has become necessary.
The controlled use of pesticides inevitably requires the use of instruments to track the use of pesticides in a timely manner. The pesticide residue detector uses enzyme inhibition rate colorimetric method to quickly and accurately detect the content of organophosphorus and carbamate pesticides in agricultural and forestry products such as fruits and vegetables. It has a menu library of more than 100 vegetable names, classified management, and can add or delete vegetable names as needed, edit vegetable names, and directly print out vegetable names.
When placing the colorimetric dish for testing, pay attention to the direction of the transparent surface being consistent with the direction of the light source.
When the temperature conditions are below 37 ℃, the rate of enzyme reaction slows down accordingly. After adding enzyme solution and color reagent, the reaction time should be relatively prolonged. The determination of the extension time should be based on the absorbance change value of the acetylcholinesterase blank control test being above 0.3, and then the operation can proceed.
3. Scallions, garlic, radish, chives, celery, coriander, bamboo shoots, mushrooms, and tomato juice contain plant secondary metabolites that can affect enzymes and easily produce false positives. When processing such samples, whole plant vegetable extraction can be used.
In the process of using pesticides, we should promptly eliminate the unreasonable use of pesticides in the past, fundamentally understand the harm of pesticide residues to human health, so as to reduce the phenomenon of blind use during use. We should gradually restore the ecological system of farmland, so that we can have more protection for crop growth, and at the same time enhance the disease resistance of crops, fundamentally reducing the use of pesticides. Any crop we have now is susceptible to pests and diseases during its growth process, which requires us to use pesticide spraying for management. Pesticides ensure the growth of various crops necessary for our daily lives, but only a portion of these pesticides are used to prevent and control pests and diseases. The rest enter the crops and remain, while others enter the natural environment, causing damage to the ecosystem. From the perspective of personal health and human development, controlling pesticide use has become necessary.
The controlled use of pesticides inevitably requires the use of instruments to track the use of pesticides in a timely manner. The pesticide residue detector uses enzyme inhibition rate colorimetric method to quickly and accurately detect the content of organophosphorus and carbamate pesticides in agricultural and forestry products such as fruits and vegetables. It has a menu library of more than 100 vegetable names, classified management, and can add or delete vegetable names as needed, edit vegetable names, and directly print out vegetable names.
When placing the colorimetric dish for testing, pay attention to the direction of the transparent surface being consistent with the direction of the light source.
When the temperature conditions are below 37 ℃, the rate of enzyme reaction slows down accordingly. After adding enzyme solution and color reagent, the reaction time should be relatively prolonged. The determination of the extension time should be based on the absorbance change value of the acetylcholinesterase blank control test being above 0.3, and then the operation can proceed.
3. Scallions, garlic, radish, chives, celery, coriander, bamboo shoots, mushrooms, and tomato juice contain plant secondary metabolites that can affect enzymes and easily produce false positives. When processing such samples, whole plant vegetable extraction can be used.
In the process of using pesticides, we should promptly eliminate the unreasonable use of pesticides in the past, fundamentally understand the harm of pesticide residues to human health, so as to reduce the phenomenon of blind use during use. We should gradually restore the ecological system of farmland, so that we can have more protection for crop growth, and at the same time enhance the disease resistance of crops, fundamentally reducing the use of pesticides.