What kind of water to wash vegetables to reduce pesticide residues

Peeling: The surface of vegetables is waxy, which is easy to adsorb pesticides. Therefore, vegetables that can be peeled should be peeled before eating.

Washing: Chlorine in tap water can remove some pesticide residues, generally vegetables are rinsed at least 3 to 6 times with clean water, and then soaked in salt water and rinsed again. For the cabbage vegetables, they can be cut first, soaked in water for 1 to 2 hours, and then rinsed with water to remove the residual pesticides.

Generally, after soaking in water, 40% of the residual pesticides in vegetables can be removed, and more than 90% can be removed from tomatoes. However, washing can only wash the ordinary water-soluble pesticides on the surface of vegetables, at least two of which cannot be washed off. One is acidic pesticides, which react with vegetables and stick tightly to the surface of vegetables.

Then there is some permeability, which can penetrate into the cells of vegetables. This kind of thing can't be washed off by any means.

Caustic washing: Put a small spoon of alkali powder (anhydrous sodium carbonate) or glacial alkali (crystalline sodium carbonate) in water and stir well before adding vegetables. Soak for 5-6 minutes, pour out the alkaline water, and then 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.

Dish soap washing: Dilute 300 times with dish soap and wash it once and then rinse it with water 1-2 times, which can remove germs, insect eggs and residual pesticides on vegetables.

Boiling water: The best way to remove some residual pesticides is to scald, such as green peppers, cauliflower, beans, celery, etc., it is best to scald 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. But if the dish soap is not rinsed, it is harmful.

Sunlight: The use of multispectral effect in sunlight will decompose and destroy some residual pesticides in vegetables. In this way, the vegetables that have been dried by sunlight have less pesticide residues.

It has been determined that the residue of organochlorine and organic mercury pesticides is lost by 60% when fresh vegetables and fruits are exposed to sunlight for 5 minutes. For vegetables that are convenient for storage, it is best to leave them for a period of time, and the oxygen in the air and the chromoenzymes in the vegetables have a certain decomposition effect on the residual pesticides. After purchasing vegetables, they are left at room temperature for about 24 hours, and the average disappearance rate of residual chemical pesticides is 5%.

In addition, 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 with water to reduce the residual pesticide components of vegetables.

In addition, the "vegetable and fruit cleaning ozone machine" launched on the market can only remove pesticides on the surface of vegetables and fruits, and the cleaning power is no different from washing, and some vegetables and fruits contain nitrogen, which reacts with ozone to form nitrate or nitrite, which is toxic and carcinogenic.

Soaking vegetables in light salt water can increase the solubility of pesticides left on vegetables to a certain extent, but the effect is limited and affects the flavor of food. If the concentration of brine is too high or the soaking time is too long, reverse osmosis is also prone to occur, and pesticides will penetrate into the inside.

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.

Most pesticides are acidic, as long as they are washed with alkaline rice water or fruit and vegetable detergent, when eating vegetables, tear off the outermost leaves, you can add salt to the water and then clean, it is best to heat and do ripening when eating vegetables.

It can be cleaned with a fruit and vegetable purifier, but most machines cannot remove pesticides 100%, and the general residue removal rate is more than 90%.

It is best to soak in the water for a while longer. It can be cleaned with a special detergent or with flour.

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.

1. If you want to make vegetables cleaner, you need to soak them slowly for a long time. It is recommended that vegetables can be soaked in water for more than half an hour before cooking.

2. If you want to reduce the pesticide residue in vegetables, it is recommended that you can use light salt water to clean it. Before washing, add a small amount of salt to the water.

3. After the vegetables are purchased, they should be left for a period of time before eating. You must know that vegetables themselves have a time for self-detoxification, and if you eat them just after buying them, it is just the time to eat pesticides.

4. After washing the rice, do not pour the water, and use the rice washing water to clean the vegetables, which can also play a role in decomposing pesticide residues.

5. Now there are vegetable cleaners, and you can buy this kind of cleaner to clean vegetables.

6. Hot water, boil hot water, cool it a little, and then put the vegetables in it and wash it, so that it can also achieve the effect of removing pesticide residues.

It is mainly used for leafy vegetables, such as spinach, lettuce, bok choy, etc. Generally, rinse off the surface dirt with clean water, remove the visible stains, and then cover the fruits and vegetables with water for about 5 cm, and soak in running water for no less than 30 minutes. If necessary, cleaning agents such as fruit and vegetable lotions can be added to increase the dissolution of pesticides.

Washing and soaking 2 or 3 times in this way can basically remove most of the residual pesticide components of the solution.

Most organophosphorus insecticides decompose rapidly in an alkaline environment. Generally, 5 10 grams of edible alkali are added to 500 ml of water to prepare alkaline water, and the fruits and vegetables after preliminary rinsing are placed in alkaline water, according to the amount of vegetables, sufficient alkaline water, soaked for 5 15 minutes, rinse fruits and vegetables with water, and repeat washing about 3 times The effect is better.

It is often used in celery, cabbage, green peppers, beans, etc. Because carbamate insecticides will accelerate their decomposition with the increase of temperature, the washed fruits and vegetables are generally placed in boiling water for 2 5 minutes and then removed immediately, and then washed with water 1 2 times, and then placed in a pot to cook into dishes.

For fruits and vegetables with skin, the appearance of the residual pesticide clump can be peeled off with a sharp object, and the fleshy part can be eaten, which is both delicious and safe.

Some pesticides slowly decompose over time during storage into substances that are harmless to human digging. Therefore, when conditions permit, some fruits suitable for storage should be purchased and stored for a period of time (10 to 15 days). Wash and peel before eating for better results.

In life, some farmers will use pesticides on vegetables in order to make them grow more lush. So if you want to eat the vegetables bought from the market with confidence, you must pay special attention to the process of cleaning the vegetables. Only by cleaning the pesticide residues in the vegetables will not threaten health.

Rice washing, salt water cleaning, soaking cleaning, alkaline water cleaning and other methods can be used to effectively remove pesticide residues. <>

1. How to clean vegetables to minimize pesticide residues in vegetables?

The soaking method is also able to remove pesticide residues, and in general, the purchased vegetables are put into pots. Add an appropriate amount of water to the pot, the water should be submerged with the vegetables, soak for 30 minutes or an hour, and then wash it continuously with running water 2 or 3 times to effectively remove it. However, this method is more suitable for cleaning spinach, leeks, lettuce, coriander, cabbage, etc.

The method of soaking in brine can also wash away pesticide residues in vegetables. After the vegetables are bought, the impurities on the surface are removed with running water. Then add a small amount of soda to the water, stir well, and soak for 15 minutes.

Then rinse with running water 2 or 3 times, this method is more suitable for vegetables and fruits. <>

2. Conclusion. Rinsing with boiling water can also reduce pesticide residues in vegetables. Because high temperature can sterilize, blanching vegetables in boiling water for 1 3 minutes can make the surface of the pesticide inactive. This method is more suitable for celery, lettuce, spinach, etc.

Do not throw away the water used to wash rice, it can also be used to clean pesticide residues. Because the rice washing water is acidic, and the pesticide will lose its activity when it encounters acidic water quality, and it will be slowly decomposed. This can also be effectively removed, and cleaning with light salt water can also reduce pesticide residues.

Because there are some cabbage, cabbage, cabbage, etc., among these vegetables, the wrapping is relatively strong. Therefore, it is easier to hide dirt and dirt, and cleaning with light salt water can effectively remove some pesticides. However, after soaking, be sure to rinse with running water.

When cleaning vegetables, you need to remove all the vegetables, put them in a pot and soak them in cold water, and choose to rinse them with running water after soaking for 15 minutes, so as to reduce the pesticide residues in the vegetables as much as possible and achieve the best dietary effect.