T/FQIA 005-2022 Determination of Toxic Residues of Chlorogenic Acid, Pentaoxinic Acid, and Simulium Paunch Fosfate in Tea by Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Scope

Scope: Scope This document specifies the liquid chromatography-tandem mass spectrometry method for the determination of the residues of toxaphene, pentachlorophenol, and deltamethrin in black tea, green tea, white tea, and oolong tea. This document is applicable to the determination of the residues of toxaphene, pentachlorophenol, and deltamethrin in black tea, green tea, white tea, and oolong tea. Other teas can be referenced for implementation. Main technical content: 1. Scope This document specifies the liquid chromatography-tandem mass spectrometry method for the determination of the residues of toxaphene, pentachlorophenol, and deltamethrin in black tea, green tea, white tea, and oolong tea. This document is applicable to the determination of the residues of toxaphene, pentachlorophenol, and deltamethrin in black tea, green tea, white tea, and oolong tea. Other teas can be referenced for implementation. 2. Normative reference documents The contents of the following documents are essential provisions of this document through normative reference in the text. Among them, the referenced documents with a date are only applicable to this document in the corresponding version on that date; the latest version (including all amendment sheets) of the unreferenced documents is applicable to this document. GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 8303 Preparation of ground tea samples and determination of their dry matter content 3. Terms and definitions This document does not define any terms or definitions that need to be clarified. 4. Principle The samples are extracted with acetonitrile, and the extract is purified by dispersive solid phase extraction. The liquid chromatography-tandem mass spectrometer is used for detection, and the quantification is performed by the external standard method. Main content II. 1 Scope 12 Normative reference documents 13 Terms and definitions 14 Principle

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