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A method for the determination of seven degradation products of indoxacarb in tea and tea soup based on ultra-high performance liquid chromatography-tandem mass spectrometry

An ultra-high performance liquid phase, tandem mass spectrometry technology, applied in the field of seven degradation products of indoxacarb, can solve the problems of rarely involving degradation products and only focusing on indoxacarb parent

Active Publication Date: 2022-04-01
TEA RES INST CHINESE ACAD OF AGRI SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods and studies only focus on the parent body of indoxacarb, and seldom involve the research on its degradation products

Method used

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  • A method for the determination of seven degradation products of indoxacarb in tea and tea soup based on ultra-high performance liquid chromatography-tandem mass spectrometry
  • A method for the determination of seven degradation products of indoxacarb in tea and tea soup based on ultra-high performance liquid chromatography-tandem mass spectrometry
  • A method for the determination of seven degradation products of indoxacarb in tea and tea soup based on ultra-high performance liquid chromatography-tandem mass spectrometry

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Experimental program
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Embodiment

[0024] 1. Experimental part

[0025] 1.1 Main instruments and equipment

[0026] UPLC / Quattra Premier XE Ultra High Performance Liquid Chromatography-Triple Quadrupole Mass Spectrometry Instrument: Product of Waters, USA, equipped with electrospray ionization (ESI) source, MassLynx 4.1 mass spectrometry workstation; chiral chromatographic column: 3 μm Cellulose-1, 3μm Cellulose-2, 3μm×150mm×2mm, product of American Phenomenex Company; Strata-X 33u PRP (polymeric reversed phase) SPE column: 500mg / 6mL, product of American Phenomenex Company; BondElut C18 SPE column, 500mg / 6mL, American Agilent Company Products; 3K-5 refrigerated high-speed centrifuge: product of Sigma, Germany; R-210 rotary evaporator: product of BUCHI Labortechnik A G, Switzerland; KQ-250DB CNC ultrasonic cleaner: product of Kunshan Ultrasonic Instrument Co., Ltd.; Vortex Genie2 vortex Rotary vibrator: product of American Scientific Company; T-18 high-speed homogenizer: product of German IKA company; DFT-20...

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Abstract

The invention discloses a method for determining seven indoxacarb degradation products in tea leaves and tea soup based on ultra-high performance liquid chromatography tandem mass spectrometry, and belongs to the technical field of tea pesticide residue detection. The present invention includes: 1) sample extraction and purification: for fresh leaves or tea samples, acetonitrile / water extraction, C 18 Purification with GCB dispersive solid phase extraction, concentrated methanol / water to volume; or 1) PRP-SPE column enrichment and purification for tea soup samples, methanol elution and reception, concentrated methanol / water to volume; 2) C-Use 2. Chromatographic column separation and ultra-high performance liquid chromatography tandem mass spectrometry to detect 7 indoxacarb degradation products; 3) Calculate the standard curve and linear correlation coefficient of indoxacarb degradation products; 4) Calculate the addition recovery, relative standard deviation, and method detection limits and limits of quantitation. The method of the invention satisfies the requirements of residue analysis, and can provide an analysis method for the research and detection of seven indoxacarb degradation products in fresh tea leaves, tea leaves and tea soup.

Description

technical field [0001] The invention belongs to the technical field of detection of pesticide residues in tea, and in particular relates to a method for determining seven degradation products of indoxacarb in tea and tea soup based on ultra-high performance liquid chromatography tandem mass spectrometry. Background technique [0002] my country is the origin of tea, and it is also the world's largest producer and consumer of tea. Tea is of great significance to the economic development of the vast tea areas and the poverty alleviation of tea farmers in mountainous areas. Tea is a green and healthy beverage, and its quality and quality safety are related to the long-term sustainable development of the tea industry. Tea grows in a hot and humid environment, and pests and diseases are relatively easy to occur. Spraying chemical pesticides is the fastest and most effective way to prevent and control tea tree pests and diseases. Indoxacarb has a unique and novel structure and l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/16G01N30/34G01N30/60G01N30/72
CPCG01N30/02G01N30/06G01N30/16G01N30/34G01N30/60G01N30/72G01N2030/062G01N2030/047
Inventor 张新忠钟青陈宗懋罗逢健黎洪霞
Owner TEA RES INST CHINESE ACAD OF AGRI SCI
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