Many vegetables have been sprayed with pesticides, how to tell if there are pesticide residues in ve

Among many vegetables, some are particularly popular with pests and can be called "multi-insect vegetables". Some vegetable pests don't like it very much, so you can call it a "little bug vegetable". It is the specificity of the other components and smell of the vegetable.

Decided. Among the multi-flush vegetables, the "famous" ones are vegetables, cabbage, cabbage, cauliflower, etc., and the less-flushed vegetables have wormwood.

Lettuce, celery, carrots, onions, garlic, leeks, green onions, coriander, etc. Because there are many insect pests, multi-insect vegetables should be sprayed frequently to prevent them, and they will definitely become seriously polluted "multi-drug vegetables". Usually choose "small insect vegetables" as much as possible.

However, in the cooler season, when the pests are dormant and the pesticide spraying stops during the winter, it is okay to eat a small amount of "multi-insect vegetables".

Vegetables with normal shape and color are usually grown and not treated with chemicals such as hormones, so they can be eaten with confidence. "Above" vegetables can be treated with hormones. For example, when the leaves of leeks are particularly large and hypertrophied, twice as wide as ordinary broad-leaved leeks, hormones may have been used in the planting process, and the leaves of leeks without hormones are narrow and have a strong aroma when eaten.

Be aware that some vegetables are not normal in color, frontal lobes.

Losing its usual green color, showing dark green, etc., all wall greens are equal, and it may have been sprinkled with methyl phosphorus pesticides or soaked before harvesting, so it cannot be purchased. Certain vegetables that are not in the right shape and color, such as those that have been confirmed as new varieties, should be considered separately.

One way to choose vegetables, which is recommended by many friends, is to buy foods with insect eyes. Why is this so? Because pesticides are now used to grow vegetables, there will be no insects after pesticides are applied to vegetables, on the contrary, vegetables with insects prove that no pesticides are used, inducing people not to worry about pesticide residues and eating healthier.

This is a well-intentioned blunder or well-intentioned ignorance. The presence or absence of insects cannot be used as a criterion for judging the absence of pesticides. Modern vegetable cultivation is complicated, and some bugs even have a certain degree of resistance.

Even if pesticides are applied, there will be insect eyes in the vegetables. Let us see if the vegetables themselves grow oddly or not. Whether the vegetables have fungal-like spots, such as white or black spots, may be caused by pesticides.

It can be seen how frequent and widespread the use of pesticides is in our daily life. If there is no scientific method of use, do not pay attention to the rational use of the species, and get pesticide residues, isn't it only agriculture and vegetables? Some growers are anxious to pursue profits, and in order to achieve the desired purpose, they are in a hurry to blindly, abbustely, spray pesticides, fertilizers.

Mainly use pesticides that prohibit loneliness, spraying concentration is too high, there is no correct proportion, dilution, ignoring the pesticide safety interval, or continuous spraying, or short interval, there are many residues in the vegetables, and finally produce residual and "polluted" vegetables. It has been shown that the detection rate of excess residues in pepper and tomato is the highest among tomato vegetables. That is to say, highly toxic organophosphorus, pesticides, methamidophos, dimethoate.

The most detected, the highest residue! It can be seen that there are standardized and scientific methods and systems for the use of pesticides, which are of great significance to people's health and social development.

To see with your eyes, first carefully observe whether there are white or yellowish solid traces on the surface of the vegetables. If you touch the surface of the vegetables with your hands and feel sticky or slippery, then you have to pay close attention to it. Soak the vegetables in water for a period of time, then touch the basin water with your hands, if the basin water feels sticky or slippery, then pesticide residues should be suspected.

To know whether there are pesticide residues, you must go to the relevant technical departments to pass the instrument testing. If you are still a little worried about pesticide residues on vegetables, you can teach you a few tips to remove pesticides, the most common way to remove pesticide residues is to soak, such as leeks, beans, spinach and other vegetables that are prone to pesticide residues, you can first put some vegetable detergent in water to soak it, and then rinse it with water, so that you can remove most of the residual pesticides on vegetables; The second method to remove pesticide residues is to wash vegetables with alkali powder, put a little alkali powder in clean water and stir evenly, soak the vegetables for 5-6 minutes, and then rinse them with water.

Many people are concerned about pesticide residues in vegetables. However, many people can buy vegetables without pesticide residues when buying vegetables, so it will be more reassuring to eat vegetables. Now let's talk about how to detect pesticides in vegetables?

1.How to detect if a vegetable contains pesticides?

Under normal circumstances, pesticide residues in vegetables are generally organophosphorus and carbamate.

Pesticides. This rapid test card can be used to detect the presence of pesticide residues in vegetables.

Measuring principle of the Quick Measuring Card:

Cholinesterase. It can catalyze indole.

Phenol acetate (red) is hydrolyzed to acetic acid and indolephenol (blue). Organophosphorus or carbamate pesticides have the same effect on cholinesterase and affect catalytic, hydrolysis, and color-changing processes.

The results showed that the white tablets of the rapid test card did not change color, indicating that the pesticide residue was high. The white tablets on the rapid test card are light blue, indicating low pesticide residues. The white flat plate of the rapid test card is sky blue, indicating that there are no pesticide residues.

The specific steps to detect pesticide residues using a rapid test card are as follows:

1) Place 2-3 drops of the eluent on the tip of the vegetable leaf, fold the vegetable leaf in half and gently pluck the position where the eluent drops are dropped.

2) Take the pesticide residue rapid test card for later use, drop a drop of water on the washed vegetable leaves on the white tablet, and let the tablet with the drop stand for 10 minutes.

3) Fold the pesticide residue rapid test card in half and hold the tablet for 3 minutes.

4) When the time comes, open the rapid test card and the white tablets turn blue, indicating that there are no pesticide residues in the vegetables. There is no color change or light blue, indicating pesticide residues in the vegetable.

2. How to remove pesticides from vegetables?

1) Soak the vegetables you bought for 5 minutes and rinse them well, or soak them in rice washing water to neutralize the toxicity of the insecticide!

2) Use baking soda.

Washing vegetables with water can also remove pesticide residues from vegetables. In general, the surface of the vegetables should be washed first, then soaked in baking soda for 10-20 minutes (usually 5-10 grams of baking soda are added to 500 ml of water), and then the soaked vegetables should be rinsed with running water.

3) High temperature heating can also decompose pesticides. Some heat-tolerant vegetables, such as cauliflower.

Beans and celery, which can be washed and blanched with boiling water for a few minutes, can reduce the pesticide content by 30%. After high-temperature cooking, 90% of pesticides can be removed.

4) In fact, over time, pesticides slowly break down into harmless substances in the environment. Therefore, for fruits and vegetables that are easy to preserve, pesticide residues can be reduced by storing them for a certain period of time. However, the method is suitable for non-perishable species such as apples, kiwis, and winter melons.

Generally, it is stored for more than 15 days.

First of all, look at the epidermis, if there are some yellow or white substances, it means that it is pesticide residue, and look at his shape, if it is particularly smooth, it means that he has also been sprayed with pesticides.

First, take a paper and wipe it on the vegetables to see if there is any residue, second, when washing, see if it will fade, the serious discoloration may be too many pesticides, third, smell the smell, see if there is a smell other than vegetables.

Of course, I know how to tell the difference, and there will be a lot of insect eyes on vegetables without pesticides, as long as I know this, I can easily distinguish them.

Of course, I know that vegetables that have not been sprayed with pesticides will have a lot of insect eyes, while vegetables that have been sprayed with pesticides will be very complete.

Pesticides for vegetables, how to identify pesticide residues in vegetables?

Vegetables are the food we all need in our daily life, and the safety of vegetables is our greatest concern. Since the growth of vegetables will be affected by pests or other insects, it is too difficult to say that some pesticides, fertilizers or other things will be used to control pests. <

But there are some vegetable farmers, in order to seek profits, the use of pesticides or fertilizers and other drugs that exceed the national regulations, will eventually cause bad damage to the human body, so when we buy vegetables, we should carefully select, so how should we identify the pesticide residues of vegetables, the best way is to send it to the relevant institutions for inspection, they will use the most scientific method, the most effective method for testing, but it takes a long time, This method is only used as a food test for the relevant authorities. Or a large-scale sampling inspection of vegetables, <

So for us ordinary people, how to identify pesticide residues in vegetables. The first is to soak and wash with water, wash the surface of the vegetables, or carry out other treatments, and the soaking time should be controlled at about 10 20 minutes. Then the brine treatment will be carried out, so that when we eat vegetables, we will be more assured and more at ease.

When we buy vegetables, we don't want to buy those strange-shaped vegetables or vegetables that grow too well, because the strange-shaped vegetables show that he uses too many hormones, or uses too much fertilizer, and grows too well, which means that he uses too many pesticides, and when the plant grows, it will inevitably suffer from the effects of insect pests, but he is intact, which shows that when planting the vegetables, a lot of pesticides are used, <>

There is also we can use the naked eye to see whether there are drug spots on the vegetables, or the smell of abnormal chemicals, when we buy vegetables, we can buy those vegetables that need to be peeled before they can be used, which is very safe, reduce the impact of pesticides on the body.

When we buy vegetables home, we can increase the number of washes and soaking time to reduce the pesticide residue of vegetables.

First of all, if there is a large amount of white or light yellow substance, it means that there is pesticide residue, and then it can be soaked in water, if there are some such floating objects, it is also pesticide residue, and the other is to touch it with your hands.

At this time, you can judge according to the color of the vegetable, and you can also judge according to the shape of the vegetable. Then you can also judge according to the holes on the leaves, if the number of holes on the leaves is relatively large, then it means that the agricultural product is relatively safe.

You can tell by the taste, or the color of the vegetables, as well as the growth of the vegetables, and you can also learn some about residues.

It can be identified according to the growth of vegetables, as well as the situation of pests and diseases, and you can also use food safety inspection equipment.

Hello dear dear, I am happy to answer for you: no pesticide testing in the process of vegetable planting and whether there are pesticide residues, to see if the vegetables themselves grow strange. Look for some mold-like spots on the vegetables, such as white spots or black spots, which can be closed to know that the noise is caused by pesticides.

Teachers and students from Guangxi Industrial Technician College demonstrated the detection process of pesticide residues in fruits and vegetables, and invited citizens to come to the stage to experience. Mr. Lu from the school introduced several simple ways to remove pesticide residues in the family, and told everyone that in daily life, you can use the pesticide residue quick test card for rapid detection. The detection method is very simple, after removing the soil on the surface of the vegetables, pick about 5 grams of vegetables, cut them into pieces about one centimeter wide, put them in a bottle with a lid or a clean bowl, and then add 10 ml of pure mammoth water or buffer, shake and swing 50 times, and let stand for 2 minutes.

After that, remove the covering film on the pesticide residue test card, and dip the extract with the white tablets on the test card. After standing for another 10 minutes, fold the speed test card in half and pinch it by hand for 3 minutes, if the white tablets in the speed test card do not change color, the pesticide residue concentration is high; If the drug is light blue, the residual concentration is relatively low; Obvious blue color means that there is no residue or very low concentration of pesticides. The above is mine, I hope it can help you, I wish you a happy life!

Hello, if you do not use pesticides in the planting process, there should be no pesticides when testing, dear, it is recommended that you can ask your relatives if you have played pesticides without you knowing, or what is wrong during the test, if there are pesticides in vegetables, you must remove them when eating. 1. Soak the vegetables for 5 minutes and then rinse, or soak them in rice water to neutralize the pesticide toxicity! 2. Washing vegetables with baking soda can also remove pesticide residues in vegetables well, which generally requires rinsing the surface of vegetables first, and then soaking them in baking soda (generally five to ten grams of baking soda need to be added to 500 ml of water) for 10-20 minutes, and then rinsing the soaked vegetables with flowing water.

3. High-temperature heating will also decompose pesticides, some heat-resistant vegetables, such as cauliflower, beans, celery, etc., are washed and then scalded with boiling water for a few minutes, which can reduce the amount of pesticides by 30%, and then after high-temperature cooking, 90% of the pesticides can be removed. 4. Pesticides can be slowly decomposed into harmless substances in the environment over time. Therefore, for fruits and vegetables that are easy to preserve, they can be stored for a certain period of time to reduce the amount of pesticide residues.

However, this method is suitable for non-perishable species such as apples, kiwifruits, and winter melons. Generally, it is stored for more than 15 days.