Removing pesticide residues from vegetables and fruits

Removing pesticide residues from vegetables and fruits, are you doing it right? -- Learn these tips to let you say goodbye to pesticide residues.

But vegetables and fruits are often sprayed with pesticides to prevent pests during their growth. When we eat vegetables and fruits, greentest eco 6 if we do not remove the pesticide residues in vegetables and fruits, it will affect our health. So how do you get rid of these pesticide residues? Let's look at some simple but effective methods.

(1) Soak and wash

At present, organophosphorus pesticides are widely used in China's agriculture. Most of these pesticides dissolve in water, so water immersion is the simplest, cheaper, and suitable cleaning method. However, soaking time too short or too long can not effectively remove pesticide residues. radioactive detection This is because the soaking time is too short, pesticides can not be fully dissolved in clean water, fruits and vegetables will re-absorb pesticides, such as dimethoate, dichlorvos, etc., soaking time is too long may lead to an increase in nitrite content of vegetables. The correct way is to remove the surface stains of fruits and vegetables, soak in water for 10-15 minutes (research shows that when the soaking time is within this range, the removal rate of pesticides in fruits and vegetables can reach the maximum), and then rinse with water 2-3 times, rub the surface of vegetables or fruits with your hand during the rinsing process to further remove the residual pesticides on the surface. In addition, if 5‰ salt water immersion, the effect of removing pesticide residues is better than that of water.

(2) Heating

Heating can promote the decomposition of a carbamate pesticide, radiation detectors for sale experimental studies have proved that some vegetables with high temperature resistance such as cauliflower, beans, green pepper, celery, spinach, rape, cabbage and garlic brassy vegetables, after students comprehensively improve the cleaning work, in boiling water for 2-3 minutes, can reduce the pesticide residue in China's vegetables through effective methods. If it is cooked at high temperature, it can remove about 90% of the residual analytical pesticides on these vegetables.

(3) Detergent

The main raw material of detergent is surfactant, which helps to clean the residual pesticides that penetrate the waxy layer of fruits and vegetables, generally better than washing with water, especially slightly alkaline pesticides such as alkaline pesticides, can remove 80% to 90% of the methamphetamine and dimethoate organophosphorus chemistry of cabbage, but because the detergent itself is a chemical substance, It is easy to introduce new chemical components after use, so after using the cleaner, wash it with water 2 to 3 times.

(4) Peeling

For fruits and vegetables with waxy surfaces, water-soluble pesticides are difficult to penetrate, while fat-soluble pesticides are generally fixed in the waxy layer. Therefore, peeling is one of the most reliable ways to remove pesticides, which can remove more than 90% of pesticide residues, but green leafy vegetables are not suitable. For those endogenous pesticides, although it will reduce the removal efficiency of peel pesticide residues, it is still effective.

(5) Illumination

The photodegradation of pesticides was mainly due to ultraviolet irradiation at 253.7 nm, which destroyed the double bond of pesticides and opened the benzene ring. After 5 minutes of ultraviolet irradiation at 253.7 nm, the degradation rates of methamidophos, dichlorvos and monocrotophos were 66.1%, 66.49% and 52.4%, respectively. After 10 minutes of sunlight exposure, the degradation rate of chlorpyrifos was 60.3%, and the degradation rate of organophosphorus chemistry was better than pyrethroids.

In addition, there are many ways to eliminate pesticide residues in fruits and vegetables, such as ozone degradation, enzyme degradation and so on. However, these are not introduced due to the restrictions of the conditions of use. Finally, I wish you all a safe diet and good health while enjoying the benefits of fruits and vegetables.