T/FQIA 018-2024 Determination of residue levels of glyphosate and acetaminophen in tea leaves using liquid chromatography-tandem mass spectrometry

Scope

Scope: This document specifies the method for determining the residues of flufenoxuron, glyphosate, and ammonium methylphosphonic acid in fresh tea leaves by liquid chromatography-tandem mass spectrometry (LC-MS/MS). This document is applicable to the determination of flufenoxuron, glyphosate, and ammonium methylphosphonic acid residues in fresh tea leaves. Main technical content: This document specifies the method for determining the residues of flufenoxuron, glyphosate, and ammonium methylphosphonic acid in fresh tea leaves by liquid chromatography-tandem mass spectrometry (LC-MS/MS). This document is applicable to the determination of flufenoxuron, glyphosate, and ammonium methylphosphonic acid residues in fresh tea leaves. Main technical content index: - Preface - 1 Scope - 2 Normative references - 3 Terms and definitions - 4 Principles - 5 Reagents and materials - 5.1 Reagents - 5.2 Solution preparation - 5.3 Standard samples - 5.4 Standard solution preparation - 5.5 Materials - 6 Instruments and equipment - 7 Sample preparation and storage - 8 Analysis steps - 8.1 Pretreatment - 8.2 Determination - 8.3 Parallel tests - 8.4 Blank tests - 9 Result calculation and expression - 10 Sensitivity, accuracy, and precision - 10.1 Sensitivity - 10.2 Accuracy - 10.3 Precision - Appendix A (informative) - Index of English and Chinese names of glyphosate, flufenoxuron, and ammonium methylphosphonic acid derivatives - Appendix B (informative) - Retention times, parent ions, daughter ions, and ion pairs of glyphosate, flufenoxuron, and ammonium methylphosphonic acid derivatives in mass spectrometry - Appendix C (informative) - Multiple reaction monitoring (MRM) chromatograms of glyphosate, flufenoxuron, and ammonium methylphosphonic acid derivatives

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