Barley, wheat, oats, rice, corn/agricultural product testing

Determination of residues of 486 pesticides and related chemicals in grains by liquid chromatography-tandem mass spectrometry (LC-MS/MS). This standard specifies the method for the determination of residues of 486 pesticides and related chemicals in barley, wheat, oats, rice, and corn (see Appendix A and Appendix E) by liquid chromatography-tandem mass spectrometry. This standard is applicable to the qualitative identification of 486 pesticides and related chemical residues in barley, wheat, oats, rice, and corn, and the quantitative determination of 376 pesticides and related chemical residues. The detection limit of 376 pesticides and related chemicals quantitatively determined in this standard is 0.02 pg/kg - -0.96 mg/kg (see Appendix A). 2 Normative References: The clauses in the following documents become 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 this standard. However, parties to 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 applies to this standard. GB 5491 Grains and Oils - Sampling and Sampling Methods - Accuracy (Accuracy and Precision) of GB/T 6379.1 Measurement Methods and Results - Part I: General and Definitions (GB/T 6379.1-2004, ISO 5725-1-1994, IDT) - GB/T 6379.2 Accuracy (Accuracy and Precision) of Measurement Methods and Results - Part 2: Basic Methods for Determining the Repeatability and Reproducibility of Standard Measurement Methods (GB/T 6379.2-2004, ISO 5725-2-1994, IDT) GB/T 6682 Specification and Test Methods of Water for Analytical Laboratory (GB/T 6682-2008, 1SO 36961987, MOD) 3 Principle: Acetonitrile homogenization method is used to extract pesticides and related chemicals in samples, gel permeation color harmonic purification, liquid chromatography tandem mass spectrometry, and external standard method is used for quantification

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