Food safety has always been the most concerned, especially plant food, which contains a large number of pesticide residues, is a headache for many people. GB 23200.113 and GB 23200.121 complement each other, making the detection more convenient and fast, the strongest combination!

GB 23200.113 is “National Standard for Food Safety — Determination of Residues of 208 Pesticides and Their Metabolites in Plant-based Foods by Gas chromatography-Mass Spectrometry”, which was jointly issued by the National Health Commission, the Ministry of Agriculture and Rural Affairs and the State Administration for Market Regulation. GB 23200.121 is “National Standard for Food Safety – Determination of 331 pesticides and Their Metabolites Residues in Plant-based Foods by Liquid chromatography-Mass spectrometry”, which was jointly issued by the National Health Commission, the Ministry of Agriculture and Rural Affairs and the State Administration for Market Regulation. Both are commonly used international standards for the detection of plant-derived food pesticides, and they are very similar in terms of pretreatment. Then, what is the relationship between the two?

First of all, let’s look at GB 23200.113, which is the first GC-MS/MS national standard method for the analysis of multiple agricultural residues in plant-derived foods, including almost all plant-derived foods. The QuEChERS sample pretreatment method and gas chromatography-mass spectrometry detection method were included in the national standard method for the detection of multi-pesticide residues for the first time. The matrix covers a wide range and involves many types of pesticides. The new national standard covers almost all the plant-derived foods, including 23 sample matrices in 9 categories, such as vegetables, fruits, edible fungi, cereals, beans, oil crops, tea, spices, vegetable oils, etc. The detection targets were 208 pesticides and their metabolites, including organophosphates, organochlorines, pyrethroids, triazoles, amides, triazines, phenoxycarboxylic acids and carbamate.

GB 23200.113-2018QuEChERS configuration scheme

GB 23200.121, as the national standard of LC-MS/MS with the largest number of pesticide residues measured by single needle in China, can analyze 331 pesticides and 44 metabolites in a total of 375 pesticide residues in a single needle by using QuEChERS pretreatment method, involving both highly toxic and prohibited organophosphorus and carbamate pesticides. It also involves the commonly sold large pesticide varieties such as triazole fungicides and benzoyl urea insecticides. It involves edible fungi, fruits, vegetables, sugar, grain, oil crops, tea, nuts and spices, plant oil agricultural products, with a wide range of categories and varieties, fully covering plant-derived food.

GB 23200.121-2021 Quechers configuration scheme

The QuEChERS method has become a fast sample pretreatment technology developed internationally for the detection of agricultural products. The pretreatment of 23200.121-2021 basically continues the QuEChERS pretreatment method in the GB 23200.113-2018 standard, and the two are complementary. One sample can be used for GC-MS/MS and LC-MS/MS detection at the same time by using the same pretreatment method, which greatly simplifies the pretreatment process, shorens the pretreatment time, and improves the applicability and detection efficiency of the national standard method.

GC-MS/MS standard contains 208 kinds of pesticides, LC-MS/MS standard contains 375 kinds of pesticides, among which 118 kinds of overlapping pesticides, the two standards contain 465 kinds of pesticides. It is equivalent to the determination of most pesticide residues specified in GB 2763-2021 “National Standard for Food Safety Pesticide Residue Limits in Food” by only two injections in the future, greatly escorting people’s food safety.

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