1, tap water: the soaking time should not be too long, 10 minute is appropriate \ r \ n Yi Zhu, an associate professor at the College of Food Science and Nutritional Engineering of China Agricultural University, said that some pesticide residues can be removed by soaking or rinsing with tap water, but the soaking time should not be too long, and 10 minute is appropriate. Soaking for too long may produce nitrite, which is also harmful to the body. The proportion of vegetable poisoning incidents caused by organophosphorus pesticide residues is very high, including common dichlorvos. When cleaning this kind of pesticide residues, warm water is better than cold water. \r\n2。 Salt water: It is easy to lose nutrients and is beneficial to pest control \ r \ nJi Guo, an associate professor at the College of Food Science and Nutritional Engineering of China Agricultural University, said that it is not advisable to soak fruits and vegetables with salt water, especially green leafy vegetables, which will destroy the cell membrane of leaves, not only lose nutrients, but also allow pesticide residues to enter vegetables. Ma Zhiying, director of the Expert Committee of Shanghai Food Association, pointed out that salt water has little effect on cleaning pesticide residues, but it helps to remove pests in fruits and vegetables. For example, salt water can soak out some bugs in fruits and vegetables such as cherries and cauliflower. \r\n3. Adding alkali (baking soda) to water: If the concentration is not well grasped, it is no different from tap water \ r \ n \ r \ nYi Zhu pointed out that for common pesticide residues, soaking with baking soda may be better. Edible alkali such as baking soda has certain effect on removing organophosphorus pesticide residues. Adding 10% edible alkali to clean water has the best removal effect, and the removal rate of dichlorvos can reach 76. 1 1%. However, the influence of edible alkali concentration below 2% or above 15% is the same as that of tap water. Therefore, when washing fruits and vegetables with alkali, we must master the concentration. \r\n4。 Taomi water: it helps, but you must ensure that there is no residue. \ r \ The common rice washing water in life is actually weakly alkaline water, which is helpful to clean pesticide residues. However, some rice itself has pesticide residues, and there may be uncertain risks in rice washing water. \r\n5。 Detergent: If not encouraged, it may cause secondary pollution.