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Rapid organophosphorus pesticide detection method based on graphene oxide

A technology for organophosphorus pesticides and detection methods, which is applied in the field of analytical chemistry detection to achieve the effects of low cost, simple method operation, and reduced sample matrix interference

Inactive Publication Date: 2016-06-29
JINING ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C
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Problems solved by technology

There is no report on the use of graphene oxide as a dispersed phase extraction adsorbent for the detection of organophosphorus pesticide residues in fruits and vegetables

Method used

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  • Rapid organophosphorus pesticide detection method based on graphene oxide

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Embodiment Construction

[0027] The present invention is described by taking the detection of garlic as an example.

[0028] equipment:

[0029] 1290-6460 liquid chromatography-tandem mass spectrometer from Agilent of the United States, equipped with jet stream ion focusing electrospray ion source (AJS-ESI); GM200 high-speed homogenizer from IKA, Germany; MMV-1000W oscillator from Tokyo, Japan; CR22GⅢ high-speed refrigerated centrifuge from Hitachi, Japan; vortex mixer from IKA, Germany.

[0030] Materials and Reagents:

[0031] Graphene oxide was provided by Jining Lite Nano Technology Co., Ltd.; acetonitrile, methanol, and formic acid were all chromatographically pure; anhydrous sodium sulfate (burned at 650°C for 4 hours, stored in a desiccator after cooling, for use), and sodium chloride were Analytical pure; experimental water is ultrapure water.

[0032] Standards: organophosphorus standard products include dimethoate, methafos, malathion, triazophos, quinathion, chlorthion, profenofos, chlor...

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Abstract

The invention discloses a rapid organophosphorus pesticide detection method based on graphene oxide and belongs to the field of analytical chemistry detection. The method includes the following steps of 1, extraction, wherein a to-be-detected sample is weighed and put in a plastic centrifugal tube, acetonitrile is added, homogeneous extraction is conducted for a period of time, anhydrous sodium sulfate and sodium chloride are added, and oscillation and centrifugation are conducted; 2, purification, wherein supernatant is transferred to another clean centrifugal tube, graphene oxide is added for dispersive solid-phase extraction, volution and standing are conducted, and the mixture passes through an organic phase filter membrane; 3, detection, wherein the sample liquid passing through the filter membrane is fed to liquid chromatography-tandem mass spectrometry (LC-MS / MS) for detection. The method has the advantages that the graphene oxide dispersive solid-phase extraction technology is utilized, the simple, convenient and rapid organophosphorus residue detection method is established, and the method is easy to operate and low in cost, can reduce interference of a sample matrix, and is suitable for rapid detection of organophosphorus pesticide in vegetables and fruits.

Description

technical field [0001] The invention relates to a rapid detection method for organophosphorus pesticides based on graphene oxide, in particular to a rapid method for detecting organophosphorus pesticide residues in fruits and vegetables by graphene oxide dispersed solid-phase extraction combined with liquid chromatography tandem mass spectrometry, which belongs to analytical chemical detection field. Background technique [0002] Organophosphorus pesticides have been used for many years, and their varieties and dosages still rank first among all kinds of pesticides. Due to the high toxicity and wide use of organophosphorus pesticides, food poisoning incidents caused by excessive organophosphorus pesticide residues occur from time to time. It is imperative to strengthen the management of pesticide application and the monitoring of pesticide residues. Rapid, sensitive and feasible monitoring methods have also become a top priority. [0003] Dispersive solid-phase extraction ...

Claims

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Application Information

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IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/027
Inventor 倪永付
Owner JINING ENTRY EXIT INSPECTION & QUARANTINE BUREAU OF P R C
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