{"id":1344,"date":"2021-09-01T01:57:25","date_gmt":"2021-09-01T06:57:25","guid":{"rendered":"https:\/\/www.creative-diagnostics.com\/blog\/?p=1344"},"modified":"2021-09-01T01:57:25","modified_gmt":"2021-09-01T06:57:25","slug":"pesticide-residue-testing","status":"publish","type":"post","link":"https:\/\/www.creative-diagnostics.com\/blog\/index.php\/pesticide-residue-testing\/","title":{"rendered":"Pesticide Residue Testing"},"content":{"rendered":"

The development of agricultural industrialization makes the production of agricultural products increasingly dependent on foreign substances such as pesticides, antibiotics and hormones.\u00a0According to the World Health Organization (WHO), more than 1,000 pesticides are used all over the world.\u00a0Although the use of pesticides helps fight diseases and increase agricultural productivity, their residues may remain on food and be transported to the air, soil, and water.\u00a0The unreasonable use of these substances will inevitably lead to excessive pesticide residues in agricultural products, affecting consumer safety, and in severe cases, it will cause consumers to become ill, develop abnormally, and even directly lead to poisoning and death.\u00a0Excessive pesticide residues will also affect the trade of agricultural products.\u00a0Countries around the world attach great importance to the issue of pesticide residues, and increasingly stringent limits are imposed on pesticide residues in various agricultural and sideline products.<\/p>\n

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Pesticide residue refers to the general term of pesticide precursor, pesticide residue hazard derivatives, metabolites, degradation products and impurities remaining in the environment, organisms and food after pesticide use.\u00a0The main cause of excessive vegetable pesticide residues is the organophosphorus pesticides and carbamate pesticides that some countries banned in vegetable production, such as methamidophos, omethoate, phorate, parathion, methyl parathion.\u00a0Eating food containing a large amount of highly toxic and highly toxic pesticide residues can cause acute poisoning accidents in humans and animals.\u00a0Long-term consumption of agricultural and sideline products with excessive pesticide residues will not cause acute poisoning, but may cause chronic poisoning of humans and animals, cause disease, induce cancer, and even affect the next generation.<\/p>\n

Organophosphates, carbamates and pyrethroids are currently the three main types of insecticides on the market, especially organophosphorus insecticides still play a leading role in production, and they are the first type of insecticide used by vegetable farmers.\u00a0For organophosphorus and carbamate pesticides, scientists have done a lot of research on the rapid detection technology of pesticide residues, and made great progress.<\/p>\n

Pesticide Residue Detection Method<\/b><\/strong><\/p>\n

Folded Gas Chromatography-Mass Spectrometry<\/p>\n

GC\/MS is the most widely used method for pesticide residue analysis.\u00a0In order to pursue higher sensitivity and accuracy, GC\/MS often chooses ion mode (SIM) to confirm the target substance based on retention time, characteristic ions and ion ratio relationships.\u00a0In the United States, it is generally required that the retention time of the target in the sample is less than 0.05 minutes compared with the standard;\u00a0each target has at least 3 characteristic ions, and the relative ion ratio is within 10% of the absolute value of the standard;\u00a0at the same time Other effects of the matrix on the target should be considered;\u00a0the experimental recovery rate is generally between 70% and 120%.\u00a0In the European Union, using the SIM mode requires at least 2 characteristic ions greater than m\/z200 or 3 characteristic ions greater than m\/z100 for each target;\u00a0the ratio of characteristic ions of the target is 70%-130% compared with the standard;\u00a0daily The detection recovery rate is controlled at 60%-140%, and the confirmation analysis needs to be between 70%-110%.<\/p>\n

Folding rapid detection technology<\/p>\n

However, traditional GC\/MS and other pesticide residue analysis techniques are expensive and time-consuming.\u00a0This has brought a lot of inconvenience to the supervision of agricultural products before, during and after production by the food safety supervision department.\u00a0The detection techniques for pesticide residues commonly include chemical rapid detection method, immunoassay method, enzyme inhibition method and in vivo detection method.<\/p>\n