Pesticide residue detector 180 seconds to ensure the safety of food baskets

The safety at the tip of the tongue has been increasingly concerned by the people in recent years. With the public's doubts, we must get close to the fruit and vegetable market and see how the market tests pesticide residues. At present, the determination of pesticide residues is generally detected by a pesticide residue detector. How does the instrument operate? The following walks into the testing room and looks at the specific detection process of the pesticide residue detector.

The inspector chopped 10 kinds of vegetables such as lentils, organic cauliflower, yam celery, lettuce, okra, cucumber, tomato, and parsley, and took 2 grams of them and added them to a prepared transparent beaker of 50 ml. “Then add 5ml of buffer to each beaker and shake and extract for 2-3 minutes.” “Then take 150μl of supernatant from each beaker and place it in the appropriate position on the reagent plate.” The control group is also set in the experiment. 150 l of buffer was added. "Add 50 μl of enzyme reagent and color reagent, respectively, and put the substrate after standing for 10 minutes, then you can put it into the detector. After the reagent plate is placed in the pesticide residue detector, it must be shaken automatically. The detector can be With automatic analysis, a test report can be issued in 180 seconds.”

After the test report is printed, the above items include the sample name, inhibition rate, test result detection time, and other items. Among them, the test result of lettuce was positive, the inhibition rate was 99.31%, the tomato test result was weakly positive, and the inhibition rate was 48.27%. However, the inhibition rate of lentils, organic cauliflower and garlic sprouts was only 1%. If the sample inhibition rate is ≥40%, it means that the sample pesticide residue exceeds the standard and is a positive result. "Using pesticide residue detectors, a group of fruit and vegetable pesticide residues testing takes about 20 minutes.

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