广西柳州市王宏小朋友问:有人用盐水洗蔬菜,说是能去除蔬菜上的残留农药,这是真的吗? 用食盐水清洗蔬菜,的确没有人们想的那么有用,其作用仅是:食盐能加速蔬菜的脱水作用,进而将一些己进入组织的农药带出,但是成效非常低。用3%的食盐溶液清洗蔬菜,再用仪器检测农药的残留量,结果表明,食盐水与清水洗涤蔬菜的效果,几乎没有差异。也就是说,以食盐水清洗蔬菜,不见得会洗得 Wang Hong, from Liuzhou, Guangxi, asked: Some people use salt water to wash vegetables and say that they can remove residual pesticides from vegetables. Is this true? Washing vegetables with salt water is really not as useful as people think. Its role is only: Salt Can accelerate the dehydration of vegetables, and then bring some of the pesticides into the organization, but the effect is very low. The vegetables were washed with 3% salt solution, and the pesticide residue was measured by an instrument. The results showed that there was almost no difference in the effect of salt water washing with fresh water. In other words, washing vegetables with salt water will not necessarily wash