How to wash vegetables with pesticide residues, and how to wash vegetables to remove pesticide resid

Vegetables and fruits are an indispensable part of our lives, and for different people, we also need to eat different vegetables to supplement the nutrients needed by the body, but we all know that many vegetables will not be able to grow normally if there are no pesticides, so we need to remove the residual pesticides on the top when eating, and the following is to see how to remove the residual pesticides on vegetables.

1. Rinse and soak in water.

The pesticides remaining on the vegetables are mostly acidic, so we can choose slightly alkaline rice washing water, which can remove most of the pesticides very well, and then we can soak it in water for about a quarter of an hour, we can continue to rub repeatedly, pay attention not to rotten the vegetable leaves, otherwise it is easy to cause secondary pollution.

2. Peel off the outer leaves.

Many vegetables in life have a protective outer leaf, and the amount of residual pesticides on these parts is the largest, such as onions, cabbage, cabbage, potatoes, etc., so we can directly remove the outer layer, which can also be a good way to remove the residual pesticides.

3. Blanch with hot water.

For some pesticides or vegetables that are not easy to handle, such as cowpeas, green beans, etc., we can blanch them in boiling water after cleaning the dirty things, and we can remove 90% of the pesticides.

Fourth, peel and clean.

Many vegetables in life are skinned, like the common cucumbers, winter melons, eggplants, etc., we just carry out simple peeling is to remove the pesticides remaining on it, but we should pay attention to the best choice of seasonal vegetables, otherwise vegetables may contain different degrees of hormones, and eating too much is not good for the body.

The above is for you to introduce some of the methods of removing residual pesticides on vegetables, I believe that these methods are very helpful to everyone, we must pay attention to the steps and methods, it is best not to eat raw, otherwise it will be very easy to cause some health problems.

Using tap water, salt water, rice washing water, fruit and vegetable detergent or adding vinegar and baking soda to the water can wash off pesticide residues on vegetables to a certain extent.

We all know that many of the vegetables sold on the market are pesticides, and the vegetables need to be cleaned carefully, but the washed vegetables will still have pesticide residues, which need to be thoroughly cleaned.

Add salt and wash repeatedly or soak for half an hour.

It is best to use a special detergent.

Answer: (1) Running water rinsing plus soaking method. The main pesticides used to contaminate vegetables are organophosphorus insecticides.

Organophosphate insecticides are insoluble in water, and this method can only partially remove pesticide contamination. However, washing is the basic method of removing other dirt and removing residual pesticides on vegetables and fruits, and is mainly used for leafy vegetables, such as spinach, enoki, leek flowers, lettuce, bok choy, etc. Generally, the surface dirt is rinsed off repeatedly with water, then soaked in water for 15 minutes, and then rinsed with running water two or three times.

Fruit and vegetable cleaning agent can increase the dissolution of pesticides, and a small amount of fruit and vegetable cleaning agent can be added when rinsing.

2) Running water rinsing and alkaline water immersion method. Organophosphate insecticides decompose rapidly in an alkaline environment, so this method is an effective measure to remove pesticide contamination. It can be used for all kinds of vegetables and fruits.

The method is to rinse the surface dirt first, soak it in alkaline water (generally add 5 to 10 grams of alkaline surface to 500 ml of water) for 5 to 15 minutes, and then rinse with water 3 to 5 times.

3) Peeling method. The amount of pesticides on the surface of vegetables and fruits is relatively large, so peeling is a better way to remove residual pesticides. It can be used for apples, pears, kiwis, cucumbers, carrots, winter melons, pumpkins, zucchini, eggplants, turnips, etc.

4) Storage method. During storage, pesticides can be slowly decomposed into substances that are harmless to humans. For fruits and vegetables that are easy to preserve, they can be stored for a certain period of time with less pesticide residues.

It is suitable for non-perishable species such as pumpkin and winter melon. Generally, it is stored for more than 15 days. At the same time, it is recommended not to eat freshly picked, unpeeled fruits and vegetables immediately.

5) Heating method. Carbamate insecticides decompose faster as the temperature increases. Therefore, some vegetables and fruits that are difficult to treat by other methods can be removed by heating.

It is often used in celery, spinach, bok choy, cabbage, green pepper, cauliflower, beans, etc. Wash the surface dirt with clean water, put it in boiling water for 2 to 5 minutes to remove it, and then wash it once or twice with clean water.

1.Flushing method:Put the vegetables and fruits at room temperature for half a day to volatilize pesticides, and then rinse them with water.

Soak fruits and vegetables in full soak for 3-5 minutes, then change to clean water and wash 2-3 times, completely without foam. Cabbage and Chinese cabbage should be peeled off two to three outer leaves, then peeled one by one and rinsed with a large amount of water, then brushed with a sponge brush or soft bristle brush to remove insect eggs or dirt, and then washed with water for the second time.

2.Brushing method:For fruits and vegetables with uneven surfaces or fluffy skins, where you can't clean them by hand, carefully scrub the surface of fruits and vegetables with a soft brush and rinse them with plenty of water.

3.Peeling method: Rinse with plenty of water before peeling, and use a soft brush to remove the surface dirt, and wipe the surface moisture dry with a paper towel after washing, so that the dirt or dirty water will not pollute the edible part when peeling.

4.Excision: When spraying pesticides such as cabbage, the pesticides will collect at the base of the stem along the petiole, so the base of the stem should be cut off first; The stalk of green pepper is concave and easy to accumulate pesticides, so it should be removed before cleaning.

5.High-temperature scalding method: After washing leafy vegetables, before eating, it is safer to blanch them.

When boiling, the lid should be opened to allow the residual pesticides to decompose and evaporate. Pesticides may dissolve into the soup, so discard the boiling water and do not drink it.

6.Storage method: Non-perishable fruits and vegetables, you can buy them back and store them for a few days, but do not put them in the refrigerator.

During storage, the enzymes contained in the plant will gradually decompose the residual pesticides, such as courgette, pumpkin, onion, taro, carrot, white radish, etc.

7.Killing the Essence: Root vegetables such as asparagus, bamboo shoots, corn, etc. can be washed in hot water of more than 90 degrees, heated for about 1 minute, and then quickly rinsed with cold water and cut into pieces.

The first is "salt washing". The composition of salt is sodium chloride, and washing vegetables with salt will make the pesticide more stable, and it will only kill the cabbage insects.

The second is "cut before washing". This mistake is more serious than washing vegetables with salt, because it increases the chance of contamination of the surface of vegetables with bacteria and pesticides, so you should wash them first and then cut them.

The third is to "extend the soaking time". If fruits and vegetables are soaked for more than half an hour, it is easy to lose vitamins.

Fourth, "clean with synthetic detergents". There is a possibility that secondary contaminants will remain.

Fifth, "wash vegetables with rice washing water". Rice itself carries the risk of pesticide residues, and washing fruits and vegetables with rice washing water may be more helpful.

Washing: Generally, vegetables should be rinsed at least 3-6 times with clean water, and then soaked in lightly salted water and rinsed again. For cabbage vegetables, you can cut them first, soak them in clean water for 1-2 hours, and then rinse them with water to remove the residual pesticides.

Caustic washing. Put a teaspoon of alkali powder (sodium carbonate anhydrous) or glacial alkali (crystalline sodium carbonate) in the water and stir well, then add the vegetables. Soak for 5-6 minutes, pour out the alkaline water, and rinse with water.

If there is no alkali powder or glacial alkali, baking soda can be used instead, but the soaking time is appropriately extended, which generally takes about 15 minutes.

Blanch with boiling water. The best way to remove some residual pesticides is to blanch, such as green peppers, cauliflower, beans, celery, etc., it is best to blanch it with boiling water before frying or burning in the pot, according to the test, it can remove more than 90% of the residual pesticides.

Wash with rice washing water.

Washing vegetables with rice washing water can remove some of the pesticides that remain on the vegetables. At present, most of the organophosphorus pesticides such as methamidophos, phosphine, dichlorvos, dimethoate and other organophosphorus pesticides are used to kill insects, and these pesticides will lose their toxicity when they encounter acidic substances. Soak in rice washing water for about 10 minutes and rinse it with clean water to reduce the pesticide residue in vegetables.

Pesticide residues in vegetables are an important issue in food safety. Especially in summer, it is not only the peak period of vegetable consumption, but also the active period of pests, producers in order to catch up with business opportunities, either use excessive concentration of pesticides to kill insects, or apply pesticides to harvest in advance, resulting in a large number of vegetable pesticide residues seriously exceeding the standard. According to statistics, under normal circumstances, the pass rate of pesticide residues in summer vegetables is more than 20% lower than that in winter.

In order to reduce pesticides on vegetables, people have come up with various methods: drying in the sun, blistering with water, washing with rice washing water, etc., but are these methods really effective, and how many pesticides can be removed? The College of Food Science at China Agricultural University recently conducted an experiment to help people figure out the best way to remove pesticides.

Since pesticides are mainly attached to the surface of fruits and vegetables during the spraying process, as long as effective washing and processing methods are adopted, the residue of pesticides can be reduced and the food safety of vegetables can be ensured.

Soaking and scrubbing with water can reduce the amount of pesticide residues, and the longer the soaking time, the less pesticide residues. Tests have shown that 15-60 pesticide residues can be removed by soaking vegetables in tap water for 10-60 minutes and then slightly scrubbing. Soaking in a special fruit and vegetable detergent is more effective in reducing pesticide adhesion.

The detergent is diluted with water at a ratio of 1 200 and then soaked in fruits and vegetables, and the pesticide residue can be reduced by 50 -80 within 10-60 minutes; Especially in the first 10 minutes of soaking, the pesticide residue drops very significantly, which can reach about 50. Then, with a little scrubbing and rinsing with clean water, the pesticide residue can be basically removed.

Pesticides can also be broken down by heating at high temperatures, such as blanching them in boiling water or stir-frying them in oil. Experiments have proved that some heat-resistant vegetables, such as cauliflower, beans, green peppers, celery, etc., can be washed and scalded with boiling water for a few minutes, which can reduce pesticide residues by about 30, and then cooked at high temperatures, 90% of the pesticides on vegetables can be removed.

In addition, washing vegetables with rice and washing vegetables and properly using sunlight can also play a certain role in reducing pesticides on vegetables. But it is best to use the first one or two rice water, because the surface of the rice contains potassium, so the first one or two rice washing water will be weakly acidic, but then it will begin to change to alkaline, and pesticides will only lose a certain toxicity in acidic substances. Sunlight exposure can decompose and destroy some pesticides in vegetables.

It has been determined that the residue loss of organochlorine and organic mercury pesticides can reach about 60 when vegetables are exposed to sunlight for 5 minutes.

Peeling vegetables can of course also reduce pesticide residues, but it also brings a loss of vitamins and minerals in the peel. Therefore, the best way to remove pesticides is to soak fresh fruits and vegetables in detergent for 10-15 minutes, or tap water for 30-60 minutes, rinse with water.

When eating vegetables, we must wash the residual pesticides on the vegetables. You can wash the rice first, then leave the rice washing water and put the vegetables in the rice washing water to soak for 10 to 15 minutes. Because rice washing water is alkaline, it has a certain detoxification effect on pesticides.

You can also add some alkaline noodles to the water and soak the vegetables in it, which has the same effect as rice washing water.

Soak the vegetables in rice washing water.

First of all, let's introduce the first method, which is to soak vegetables in rice washing water. Rice washing water is very common, and every family has to eat rice, and there will be a large amount of rice washing water at this time. In the past, the rice washing water was thrown away, but now you can keep the rice washing water, which can be used to soak vegetables and wash your hair.

Because the rice washing water is alkaline, the pesticides on the vegetables can be destroyed when soaking the vegetables, so that the pesticides can be separated from the vegetables. And most shampoos are acidic, so rice water also has a certain effect on hair nourishment. If you have a lot of rice washing water, you can soak vegetables and wash your hair at the same time, so that your body can be very healthy.

You can buy special vegetable dish soap to soak vegetables.

When washing vegetables, you can also buy special vegetable dish soap, which has a good effect on pesticides. After washing vegetables with dish soap, be sure to rinse them with plenty of water, otherwise you may leave dish soap residue on the vegetables, which is also very bad. In fact, you can also soak the vegetables with dish soap water, and then soak the vegetables with water, so that the dish soap and pesticides can be washed together.

When frying vegetables, be sure to fry the vegetables, not half-cooked vegetables, half-cooked vegetables will have some harmful substances.

Summary. If you want to eat some fruit, be sure to wash it and peel it to ensure your health. Because there is a waxy layer on the surface of the fruit, the skin of this fruit is not edible.