Rapid detection technology for pesticide residues

In the food safety testing industry, skilled food hygiene and safety testing instruments have long on-site sampling time, expensive inspection prices, and heavy machinery and equipment, making them unsuitable for on-site food testing services. The differences between food rapid testing instruments and traditional testing instruments depend on their faster inspection speed, smaller instrument size, and suitability for on-site food hygiene and safety testing. Pesticide residues are more common in agricultural products such as vegetables and fruits, and pesticide residue testing is also a well-known food safety testing item for consumers.

In traditional pesticide residue detection, using large and medium-sized chromatographic analysis equipment for pesticide residue detection, on-site sampling usually takes a few hours, which often delays the inspection steps;

Since the New Food Safety Law required the application of rapid detection methods in inspection and testing as a basis for administrative licensing, the rapid detection of pesticide residues has become a standard configuration for food hygiene and safety supervision agencies during inspections. When conducting food testing services, inspection results can be obtained within more than ten minutes, which has also given rise to many non-destructive testing technologies for rapid pesticide residues, commonly including organic chemical rapid detection Immunological analysis methods, enzyme inhibition methods, and facial detection methods.

1. The chemical rapid detection method is mainly based on the oxidation-reduction reaction, hydrolysis product and detection solution to change color, and is used for the rapid detection of organic phosphorus pesticides. However, its sensitivity is low, its use is limited, and it is easily affected by reducing substances.

2. The key methods for immunological analysis include radioimmunoassay and enzyme immunoassay, with the most common being enzyme-linked immunosorbent assay (ELISA). Based on non-specific identification and fusion reactions of antigens and antibodies, artificial service antigens must be prepared for small amounts of fertilizers in order to carry out immunological analysis.

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