What are the detection methods for pesticide residues?

Nowadays, many vegetables and fruits can no longer return to their original ecology. My mother often said that when she was a child, there was no need to use pesticides when growing vegetables at home. Sometimes we could just pick a cucumber from the field and eat it directly without worrying about the residual pesticides on it harming our health. Nowadays, vegetables and fruits are kept in good condition and not eaten by termites by pesticides. Next, let us listen to the experts’ answers on the detection methods of pesticide residues.

Detection methods and development

Gas chromatography-mass spectrometry

One of the most effective ways to control the harm of pesticide residues to human body is to strengthen the detection of pesticide residues in food. The detection and analysis of pesticide residues in the world today is developing towards multi-residue and rapid analysis. To ensure the accuracy of high-throughput detection methods, strict pesticide residue confirmation technology is needed.

Rapid detection technology

However, traditional pesticide residue analysis technologies such as GC/MS are costly and time-consuming, which brings a lot of inconvenience to food safety regulatory authorities in supervising agricultural products before, during and after production. As a result, a large number of rapid pesticide residue detection technologies have emerged, including the common chemical rapid test method, immunoassay method, enzyme inhibition method and in vivo detection method.

(1) Chemical rapid test method: This method is mainly based on the redox reaction, in which the hydrolysis product changes color when reacting with the test solution. It is used for the rapid detection of organophosphorus pesticides. However, it has low sensitivity, limited use, and is easily interfered by reducing substances.

(2) Immunoassay, which mainly includes radioimmunoassay and enzyme immunoassay. The most commonly used one is enzyme-linked immunosorbent assay (ELISA), which is based on the specific recognition and binding reaction of antigen and antibody. For small molecular weight pesticides, artificial antigens need to be prepared before immunoassay can be performed.

(3) Enzyme inhibition method is the most mature and widely used rapid pesticide residue detection technology, which is mainly based on the specific inhibition reaction of organophosphorus and carbamate pesticides on acetylcholinesterase.

(4) In vivo detection method, which mainly utilizes the sensitive response of living organisms to pesticide residues, such as feeding samples to houseflies and observing the mortality rate to determine the amount of pesticide residues. This method is simple to operate, but has rough qualitative properties, low accuracy, and a narrow scope of application for pesticides. 4 Pilates fitness equipment

There are many ways to deal with this kind of pesticide residues now, but the vegetables and fruits you buy home must be washed thoroughly. The pesticide residues on the food can easily harm our health. It is recommended to peel the fruit when eating it. There are few green vegetables available nowadays. It is recommended that you grow some onions or bok choy at home.