Ultra-high performance liquid chromatography-tandem mass spectrometry method for detection of econazole residues in maize

An ultra-high performance liquid phase, tandem mass spectrometry technology, applied in the field of pesticide residue detection, can solve the problems of reduced extraction rate, and achieve the effect of simple method, high sensitivity and good selectivity

Active Publication Date: 2019-12-03
INST OF QUALITY STANDARDS & TESTING TECH FOR AGRO PROD OF SHANDONG ACADEMY OF AGRI SCI
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Problems solved by technology

The difference between it and vegetables and fruits is that it contains oil, and most of the fungicides are fat-soluble. When removing the oil matrix, it will also remove most of the fungicides, which greatly reduces the extraction rate.

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  • Ultra-high performance liquid chromatography-tandem mass spectrometry method for detection of econazole residues in maize
  • Ultra-high performance liquid chromatography-tandem mass spectrometry method for detection of econazole residues in maize
  • Ultra-high performance liquid chromatography-tandem mass spectrometry method for detection of econazole residues in maize

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Experimental program
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Embodiment 1

[0034] 1 Experimental part

[0035] 1.1 Instruments and reagents

[0036] Agilent 6460 triple quadrupole liquid chromatography mass spectrometer. Agilent Technologies 1290 liquid chromatography system (Palo Alto, CA) was equipped with vacuum degasser, autosampler (G4226A), column oven (G1316C) and binary pump (G4220A). G6460 triple quadrupole tandem mass spectrometer. T25Basic high-speed dispersing homogenizer (Germany IKA company); Laborata 4000 rotary evaporator (Germany Heidolph company); JNC N-EVAPTM112 nitrogen blowing instrument (American Organomation company); ultrasonic extractor: Kunshan Ultrasonic Instrument Co., Ltd.

[0037]Conazole (Germany Dr. Ehrenstorfer Company), sodium chloride, ammonia water (analytical grade, Sinopharm Chemical Reagent Co., Ltd.), formic acid (chromatographic grade, Merck (Darmstadt, Germany), methanol, acetonitrile (chromatographic grade, American Thermo Fisher Scientific Corporation). Ethylenediamine-N-Propylsilane (PSA), Graphitized C...

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Abstract

The invention discloses a detection method of ultra-high performance liquid chromatography-tandem mass spectrometry of ipconazole residues in maize. The detection method comprises the steps of: firstly extracting the ipconazole in the maize by utilizing an optimized QuEChERS method (purifying agents in extraction and purification steps are three kinds of PSA, C18 and GCB) with acetonitrile as an extraction solvent, and obtaining higher adding standard recovery rate; and then adopting the ultra performance liquid chromatography-tandem mass spectrometry (UPLC-ESI+-MS / MS) to detect the ipconazolein the maize. The detection method is simple, sensitive and selective, and can provide scientific techniques for safety monitoring and environmental behavior assessment of agricultural products.

Description

technical field [0001] The invention relates to an ultra-high performance liquid chromatography-tandem mass spectrometry detection method for cloconazole residues in corn, and belongs to the technical field of pesticide residue detection. Background technique [0002] Conconazole is a new triazole fungicide developed by Kureha Chemical Company in Japan in the early 1990s. It has a wide bactericidal spectrum and has systemic, protective and therapeutic effects. It is widely used to control rice, corn and other crops. It has a good control effect on rice bakanae disease, flax spot and rice blast. Buconazole is a keratosterol biosynthesis inhibitor, a broad-spectrum system fungicide, and has the effects of systemic conduction and contact protection. Its dosage is low, its activity is high, and it is safe and efficient for monocotyledonous and dicotyledonous plants, so it is widely used in corn cultivation. Although inconazole was mostly decomposed before corn harvest, a small...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/88G01N30/06
CPCG01N30/06G01N30/88G01N2030/062
Inventor 梁京芸赵善仓董崭王磊蔡达范丽霞
Owner INST OF QUALITY STANDARDS & TESTING TECH FOR AGRO PROD OF SHANDONG ACADEMY OF AGRI SCI
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