How to remove pesticide residues on fruits and vegetables
4hw.org: now the food safety problem has been paid close attention to. As our regular fruits and vegetables, many people are worried that the residual pesticides can not be washed clean, so how can we completely remove them? Here are some tips to help you!
Unique skill 1. Peeling
The surface of vegetables is waxy and easy to absorb pesticides. Therefore, vegetables that can be peeled should be peeled before eating.
Unique skill 2. Water washing
Generally, vegetables should be rinsed at least 3-6 times with clear water, then soaked in light salt water and rinsed again. For the core vegetables, cut them first, soak them in clear water for 1-2 hours, and then rinse them with clear water to remove the residual pesticides.
Unique skill 3. Alkali washing
Put a small spoon of alkali powder (anhydrous sodium carbonate) or ice alkali (crystal sodium carbonate) in the water and mix well before putting the vegetables. Soak for 5-6 minutes, pour out the alkali water, then rinse with water. If there is no alkali powder or ice alkali, it can be replaced by bicarbonate, but the soaking time can be extended properly, generally about 15 minutes.
Unique skill 4. Wash with detergent
Dilute 300 times with detergent, wash once, and then rinse with water for 1-2 times, so as to remove the bacteria, eggs and residual pesticides on vegetables.
Unique skill 5. Scald with boiling water
The best way to remove some pesticide residues is scalding, such as green pepper, cauliflower, beans, celery, etc. it is better to scald it with boiling water before frying or burning. According to the test, more than 90% of pesticide residues can be removed.
Unique skill 6. Sun exposure
Using the multispectral effect of sunlight, some pesticide residues in vegetables will be decomposed and destroyed. In this way, the pesticide residues of vegetables dried by sunlight are less. According to the determination, when fresh vegetables and fruits are exposed to sunlight for 5 minutes, the residual loss of organochlorine and organomercury pesticides is up to 60%.
For vegetables that are easy to store, it's better to put them for a period of time. The oxygen in the air and the color enzyme in the vegetables have certain decomposition effect on the residual pesticides. After purchasing vegetables, the average disappearance rate of residual chemical pesticides was 5% after 24 hours at room temperature.
In addition, washing vegetables with rice washing water can remove some pesticide residues on vegetables. At present, methamidophos, phoxim, dichlorvos, dimethoate and other organophosphorus pesticides are mostly used to kill pests in China. These pesticides will lose toxicity in case of acid substances. Soak in the rice washing water for about 10 minutes, and rinse it with clear water, which can reduce the pesticide content of vegetables.