Pesticide detection methods in vegetables: how to detect pesticide residues in vegetables?

Pesticides are very difficult to wash off completely with water, especially water-soluble pesticides will be absorbed by plants from the roots and enter the plant body, which cannot be washed at all, while fat-soluble pesticides are insoluble in water and are difficult to wash with water. using fruit and vegetable cleaners is in danger of secondary pollution by eating detergents.

In order to eat more healthily, in recent years, many people advocate a vital diet or a clean diet. But for most people, it may take a lot of effort to eat pollution-free food. Experts suggest that as long as you spend more time paying attention to buying fruits and vegetables, you can buy fruits and vegetables with the least pesticide pollution.

The public is advised to buy organic fruits and vegetables from branded organic stores. If you have to buy ordinary fruits and vegetables, there are at least the following principles to follow:

First, try to buy seasonal fruits and vegetables: especially early-listed fruits and vegetables are not only expensive, but also may use forced flowering, spray plant hormones, and have a high possibility of pesticide residues.

Second, choose and buy branded safe vegetables: buy vegetables certified by private or government units, such as Jiyuan garden and organic agricultural products, although these vegetables are up to the standard does not mean zero pesticide residues, but at least you don't have to worry about buying fruits and vegetables that use banned pesticides.

Third, try not to buy continuously harvested fruits and vegetables: fruits and vegetables sprayed with pesticides have a safe harvest period, and fruits and vegetables harvested after the safe harvest period will not have the problem of excessive pesticide residues. However, if the crops are harvested continuously, such as beans, melons and fruits, due to the different ripening rates of the fruits, they need to be harvested every day or every other day, so it is difficult to wait until the safe harvest period.

Fourth, do not attach importance to external beauty: vegetables that are fat and green in appearance and without wormholes are usually masterpieces of chemical fertilizers or pesticides. You should choose ugly fruits and vegetables. If you can find unpoisoned old worms in the heart of the cabbage, you will feel more at ease.

Pay attention to the origin: if the origin is indicated on the fruit and vegetable packaging, it is best not to choose the fruits and vegetables grown near the dust spots of dioxin, such as smoke exhaust plants, thermal power plants, incinerators and so on.

Do not buy fruits and vegetables that are susceptible to insect pests, such as cabbage, mustard monitor, cauliflower, pakchoi, corn, etc., all of which are vulnerable to insect pests, and it is almost impossible to harvest if you grow outdoors without spraying pesticides.

Do not buy hydroponic vegetables: the culture medium used in hydroponic vegetables is all chemical fertilizer formula, and the used hydroponic waste liquid is also easy to cause secondary pollution.

Try to choose fruits and vegetables that can be peeled, such as potatoes, radishes, wax gourds and so on.

9. buy more fruits and vegetables with less diseases and insect pests: such as nine-story tower, onions, fennel, asparagus, sweet potato, Zhaohe grass, sword leaf lettuce, fake ginseng, okra, purslane, panax notoginseng, white anchovy, ginger flower, fern, basil, Toona sinensis, mountain mustard, watercress, okra, jute, dogwood, flame vegetables, perilla, fresh golden needle flower, Jasper bamboo shoots, cactus, wild lotus, mushroom, mushroom Spikelets, panacea, etc.