Generally, vegetables are washed with clear water for at least 3-6 times, and then soaked in light salt water before washing. Chinese cabbage vegetables are cut first, soaked in clear water for 1-2 hours, and then rinsed with clear water to remove residual pesticides.

Six measures to remove pesticide residues in vegetables

Trick 1, peeling: there is wax on the surface of vegetables, which is easy to adsorb pesticides. Therefore, vegetables that can be peeled should be peeled before eating.

Trick 2: Wash vegetables with clear water for at least 3-6 times, then soak them in light salt water and wash them again. Chinese cabbage vegetables are cut first, soaked in clear water for 1-2 hours, and then rinsed with clear water to remove residual pesticides.

Trick 3: Alkali washing: First, put a spoonful of alkali powder (anhydrous sodium carbonate) or ice alkali (crystalline sodium carbonate) into water and stir evenly, then add vegetables. Soak for 5-6 minutes, pour out alkaline water, and then rinse with clear water. If there is no alkali powder or ice alkali, baking soda can be used instead, but it usually takes about 15 minutes, and the soaking time is appropriately extended.

Trick 4: Wash with detergent: dilute with detergent 300 times, wash once, and then rinse with clean water 1-2 times to remove germs, eggs and residual pesticides on vegetables.

Trick 5: Boiling water: The best way to remove some residual pesticides is scalding, such as green peppers, cauliflower, beans and celery. It's best to scald it with boiling water before frying or burning it in a pot. After testing, it can remove more than 90% of residual pesticides.

Trick 6. Sunbathing: Using the multi-spectral effect in the sun, some residual pesticides in vegetables will be decomposed and destroyed. In this way, there is less pesticide residue in dried vegetables. According to the measurement, the residual loss of organochlorine and organomercury pesticides reached 60% when fresh vegetables and fruits were irradiated in the sun for 5 minutes. For vegetables that are convenient to store, it is best to leave them for a while. Oxygen in the air and chromozyme in vegetables have a certain decomposition effect on residual pesticides. After buying vegetables and leaving them at room temperature for about 24 hours, the average disappearance rate of residual chemical pesticides is 5%.

In addition, washing vegetables with rice washing water can remove some pesticides left on vegetables. At present, most organophosphorus pesticides used in China are methamidophos, phoxim, dichlorvos, dimethoate and so on. These pesticides will lose their toxicity when they encounter acidic substances. Soaking in rice washing water for about 10 minute and washing with clear water can reduce the residual pesticide components in vegetables.