Detection of agricultural product/pesticide residue parameters

This section specifies the scope of dichlorvos, phorate, dimethoate, parathion, parathion, methyl parathion, fenitrothion, isocarbophos, ethion, quinethion, phoxim, trichlorfon, omethoate, phosphoramide, methylmidophos, malathion, phoxim, imidophos, methamidophos, diazinon, methyl poisoning in vegetables and fruits, killing cockroaches, parathion, chlorpyrifos, acetamidophos, amifos, monocrotophos, and chlorpyrifos A gas chromatography method for the detection of multiple residues of 54 organic phosphorus pesticides, including benzthion, dimethofos, sumphos, piperidophos, conazole, thiocyclops, methylthiocyclops, Yimian, Baomian, fly poison, dithion, sterilized phosphorus, ethymphos, desorbophos, bromophos, ethyl bromophos, probromophos, dibromophos, pyrifos, terbutafos, isocarbophos, miramifos, fenvalerate, and chlorpyrifos. This section is applicable to the detection of 54 pesticide residues in vegetables and fruits. The detection limit of this method is; 0.01 mg/kg -10 3 mg/kg (see Appendix A)

2 Normative References: The clauses in the following documents become the clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to the wooden standard. However, parties who have reached agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version of this standard applies. GB/T 6379.2 Measurement Methods and Accuracy of Results (Accuracy and Precision) Part 2: Basic Methods for Determining the Repeatability and Reproducibility of Standard Measurement Methods (GB/T 6379.2-2004, ISO 5725-21994, IDT) GB/T 6682 Specification and Test Methods for Analytical Laboratory Water (GB/T 6682-1992, neq ISO 36961987) GB/T 8855 Sampling Methods for Fresh Fruits and Vegetables (GB/T 8855-1988, eqv ISO 8741980) The organic phosphorus pesticides in the three principle samples are extracted with acetonitrile, the extracted solution is filtered and concentrated, and then diluted with acetone. The two injection ports of the gas chromatograph are simultaneously injected with a dual automatic sampler. The pesticide components are separated by two capillary columns with different polarities, and the flame photometric detector< FPD phosphorus filter detection. Qualitative analysis using double column retention time and quantitative analysis using external standard method. Unless otherwise specified, only reagents confirmed as analytically pure and at least Grade II water specified in GB/T6682 shall be used in the analysis. 4.1 Acetonitrile. 4.2 Acetone, steam again. 4.3 Sodium chloride, baked at 140 ℃ for 4 hours, 4.4 filter membrane, 0.2 um, organic solvent membrane. 4.5 Aluminum box

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