There will be some residual pesticides in vegetables, how to get rid of these pesticides?

Toxic pesticides, low toxicity pesticides safety period is only seven days, after seven days will generally have insects, as long as a week after washing with water several times is basically fine, we grow our own food is also the same medicine, some people say that the dish is not sprayed that is all fake, do not spray you and the original can not eat may people think I am whimsical, in fact, our country's science and technology, to develop to blow a breath can detect drunk driving, a drop of blood can measure blood sugar, herbicides can make weeds die, crops grow normally.

<> why can't pesticides kill pests and be harmless to people? If there are problems such as harmless pesticides and insect egg residues, and the insufficient amount of rice washing water may also cause secondary pollution of vegetables. When the concentration of brine reaches more than 2%, it is possible to remove a part of the pesticides, but the concentrated brine will destroy the epidermal cells of vegetables, so that a large amount of water-soluble nutrients are lost.

The second is the soaking method, where the purchased vegetables are washed and soaked in water for 15 minutes.

Change the water and soak it for about ten minutes, and then rinse it, which can basically remove most of the pesticides and rinse them out with tap water. However, because there are many pesticide residues, it cannot be said that one detergent can remove all the residual pesticide ingredients. The main purpose of planting vegetables is to prevent pests and diseases, and most farmers do not pay attention to the amount of pesticides and pesticide residues, as for orchids and fungi, in addition to removing pesticide residues (basically by cleaning, blanching), sand and gravel, soil, and small insects (orchids) are also very important.

You can shake it while washing it to let mud chips and small insects fall, or you can brush it with a brush a few times and blanch it at the end.

The pesticides on the crops, people can use all kinds of methods, and the eight immortals cross the sea to show their magical powers. But is it really possible to wash or completely remove pesticide residues? In fact, it is impossible, but we can understand the mechanism of action of pesticides and do our best to remove pesticide residues.

1. Brewing method: such as cabbage, spinach, etc., soak it in water for half an hour, or add a little washing spirit to soak; 2. Blanching method: such as celery, green peppers, tomatoes, etc., blanch them with boiling water for 5-10 minutes; 3. Cutting method:

For stem vegetables such as carrots, potatoes, etc., peeling can be done; 4. Washing method: For cauliflower such as daylily, leeks, etc., rinse them in water, drain them while washing, and finally soak them in salt water.

Vegetables with more leaves of this kind of vegetables have spinach, kale, cabbage, etc., this kind of vegetable pesticides are easy to remain in the uneven leaves, the practice is to wash off the mud of the vegetables themselves, and then directly soak them in water for 1-2 hours and then take them out, when soaking, you can put a tablespoon of baking soda or a soybean-sized alkali in the water, and you can take it out and wait for the pot in about a time.

There are still some residual pesticides in vegetables, in order to remove these pesticides, we can put some dish soap to wash fruits when washing, and then wash carefully, or soak in water for a while, so that these pesticides can also be removed.

Method: You can use the brine washing method, washing vegetables with 1%-3% light salt water can not only remove part of the pesticides, but also remove all kinds of small insects hiding in the veins on the back of the root or leaves.

Ingredients: Edible salt, pot.

The specific steps are as follows:

1. Add an appropriate amount of warm water to the prepared basin and pour in an appropriate amount of edible salt.

2. Next, stir the brine well, as shown in the figure below.

3. Then, put the vegetables to be washed and soak them in a pot for about three minutes.

4. After three minutes, wash the vegetables again.

5. Finally, rinse out the greens to remove pesticide residues on the vegetables.

How do you remove pesticides from vegetables?

Removing pesticide residues from vegetables requires the following eight steps:

Required materials: one pack of edible alkali, one bottle of white vinegar.

1. Prepare a basin of warm water.

2. Edible alkali is added to warm water, and edible alkali is added to adsorb vegetable pesticide residues.

3. Add white vinegar. The purpose of this step is to soften the sludge action with white vinegar.

4. Stir well.

5. Put the vegetables in a pot and wash them.

6. Soak the vegetables for three minutes.

7. Wash the vegetables again after three minutes.

8. Finally, rinse out the greens, and the pesticides will be removed.

Precautions: There is no white vinegar, and general vinegar can also be used instead.

How to remove pesticide residues on vegetables and fruits bought? How to reduce pesticide residues in vegetables, vegetables contaminated by pesticides or pesticide residues exceeding the national standards shall not be marketed and shall not be eaten. How to reduce pesticide residues in vegetables?

Although in the past two years due to food safety has received widespread attention, such as the prohibition of the use of highly toxic pesticides, pollution-free vegetable area is expanding, but there is a gap in the understanding of some areas, the development is unbalanced, coupled with the complexity and uncommon detection of pesticide residues, some pesticides exceed the standard vegetables are also mixed into the market, and the general consumers do not know, so some simple methods are proposed to reduce the pesticide residue pollution of vegetables on the market after harvesting is effective.

Methods for reducing pesticide residues in vegetables:

a) Immersion method.

Rinse the purchased vegetables with water 2-3 times and soak them in clean water for 1-2 hours to remove pesticides from the remaining surface. You can also add a small amount of dish soap to water and soak it for 10 minutes, which can transfer most of the pesticides on the surface to the dish soap solution. After soaking, rinse with water 2-3 times.

2) Alkaline water immersion.

Many organophosphorus pesticides decompose easily in alkaline environments. The method is to put a small spoon of baking soda in the water, then put the vegetables and fruits into the soak for 15 minutes, remove them and wash them with water.

c) Peeling method.

Some organophosphorus, organomercury and pyrethroid pesticides have low solubility in water, but are easily soluble in organic solvents or waxy solvents, while melons and fruits vegetables have wax and are easy to absorb pesticides, so they should be peeled and eaten again.

4) Heating method.

With the increase of temperature, methyl aminoester pesticides can accelerate decomposition, and pesticides can be removed by heating method, by cleaning the surface of vegetables first and then blanching them in boiling water for 2-5 minutes, and removing more than 90% of the residual pesticides.

5) Acid immersion method.

Most pesticides and insecticides such as methamidophos, dimethoate, etc., will lose their toxicity when exposed to acid, you can wash the vegetables first and then put a small amount of sour vinegar in the water, soak the vegetables for 10 minutes, remove and rinse, can reduce pesticide residues.

6) Pesticide residue detector.

GY-NC05 pesticide residue detector strictly follows the provisions of the "GB Standard for Rapid Detection Methods for Organophosphorus and Carbamate Pesticide Residues in Vegetables" for the rapid detection of organophosphorus and carbamate pesticide residues in vegetables; It can accurately and quickly detect organophosphorus and carbamate pesticide residues in vegetables, fruits, grains, tea and soil.

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.

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Alkali is alkaline, vinegar is acidic, and the acid-base undergoes a neutralization reaction. If there is a lot of acid after neutralization, the pesticide cannot be removed at all, because the pesticide is acidic. If there is more alkali after neutralization, some pesticides can be removed, but because of the neutralizing effect of vinegar, the effect has been greatly weakened.

If you are worried that the residual pesticides in vegetables and fruits are not clean, you can add 5-10 grams of edible alkali to 500 ml of water to prepare alkaline water, soak the vegetables and fruits in the initial rinse for 15 minutes and rinse them with water, so that the effect of repeated washing three times is better.

To remove the residual pesticides in vegetables, you can use the following simple methods: add a small spoonful of flour to a basin of water and stir evenly, soak the vegetables for 20 minutes, and then take out and wash them with water, the organic pesticides are adsorbed by starch, and most of the organic pesticides attached to the surface of the vegetables can be removed. As for the pesticides that are inhaled into the vegetables by this method, some of the pesticides will decompose during cooking, but there may still be residues.

To avoid the harm of pesticides, it should be solved from the root, and agricultural producers do not use pesticides or use low-toxicity and non-residue pesticides.

1. Soak fruits and vegetables in tap water for 10 to 60 minutes and then scrub them slightly to remove 15% and 60% of pesticide residues. However, for fruits and vegetables with waxy surfaces, such as eggplants, green peppers and fruits, it is best to soak them before washing.

2. Cutting vegetables into small pieces and soaking them will cause pesticides to seep in, the best way is to keep the vegetables and fruits intact and rinse them with running water. You can also soak it in light salt water or rice washing water for the first time or two, the former will dissolve the pesticide quickly, and the latter will neutralize the pesticide toxicity, but do not soak it for too long.

3. Sunlight exposure can decompose and destroy some pesticides in vegetables. It has been determined that the residue of organochlorine and organic mercury pesticides can be reduced by about 60% when vegetables are exposed to sunlight for 5 minutes.

4. High-temperature heating can also decompose pesticides, such as scalding with boiling water or stir-frying in hot oil. Experiments have proved that some heat-resistant vegetables, such as cauliflower, beans, celery, etc., can reduce pesticide residues by 30% after washing and then scalding with boiling water for a few minutes, and then 90% of pesticides can be removed by cooking at high temperature.

5. Although peeling vegetables will cause a certain amount of nutrient loss, it can reduce pesticide residues. In particular, cucumbers, eggplants and other vegetables that use a lot of pesticides and most fruits are best eaten by peeling.

6. When eating apples, it is best to eat less around the pit, because the gaps in the pit will cause pesticides to seep in.

It can be cleaned with a smart sink to strongly peel off pesticide residues in fruits and vegetables.

For example, the use of frequency conversion ultrasonic technology can efficiently remove pesticide residues in fruits and vegetables, meat blood stains, and seafood sediment.