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Magnetic modified nanometer organic montmorillonite and method for extracting and analyzing pesticides in water through magnetic modified nanometer organic montmorillonite

An organic montmorillonite and nano-organic technology, applied in the direction of analyzing materials, material separation, measuring devices, etc., can solve the problems of large amount of organic solvent usage, large sample volume, laborious and laborious, etc., to reduce the use of toxic organic reagents, The effect of low detection limit and high sensitivity

Inactive Publication Date: 2015-07-22
CHINA AGRI UNIV
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Problems solved by technology

The traditional pre-analysis method requires a large amount of samples and a large amount of organic solvents, which is laborious and costly

Method used

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  • Magnetic modified nanometer organic montmorillonite and method for extracting and analyzing pesticides in water through magnetic modified nanometer organic montmorillonite
  • Magnetic modified nanometer organic montmorillonite and method for extracting and analyzing pesticides in water through magnetic modified nanometer organic montmorillonite
  • Magnetic modified nanometer organic montmorillonite and method for extracting and analyzing pesticides in water through magnetic modified nanometer organic montmorillonite

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Embodiment Construction

[0032] The invention provides a magnetically modified nano-organic montmorillonite and its method for extracting and analyzing pesticides in water. The invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0033] 1. Instruments and reagents:

[0034] Agilent1200 high-efficiency chromatograph (Agilent, USA), equipped with DAD detector;

[0035] The standard samples of econazole, flusilazole, tebuconazole, hexaconazole, and penconazole were purchased from Sigma-Aldrich Co.LLC., and were diluted with methanol to form a working solution;

[0036] Second, the preparation of magnetic organic montmorillonite:

[0037] Take 3.00g FeCl 2 4H 2 O, 2.72g FeCl 3 ·6H 2 O and 3.00g of montmorillonite were placed in 200mL of water and mixed evenly, and the resulting mixture was placed in a water bath at 60°C. Under nitrogen protection, 100mL of ammonia water with a mass fraction of 1.4% was added dropwise, and after...

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Abstract

The invention belongs to the technical field of methods for detecting trace pesticides in water, and particularly relates to magnetic modified nanometer organic montmorillonite and a method for extracting and analyzing pesticides in water through the magnetic modified nanometer organic montmorillonite. By means of a novel nanometer magnetic organic montmorillonite synthesizing method, analysis and rapid preprocessing are conducted on triazole type bactericide contaminants in water, magnetic dispersion solid-phase extraction and high-performance liquid chromatography analysis are combined, and the problem of simultaneously extracting target analyzed objects of different polarities is solved. Compared with a traditional liquid-liquid extracting preprocessing method, the method has the advantages that the amount of consumed organic solvents is greatly reduced, and preprocessing time is shortened; chromatographic analysis is conducted through a high-performance liquid chromatography-ultraviolet detector, target components can be effectively prevented from impurity interference, and base line separation is achieved; the analysis method is low in detection limit, high in flexibility, good in linear relation and high in adding recovery rate, and can be widely used for measuring triazole type bactericide in a water body.

Description

technical field [0001] The invention belongs to the technical field of detection methods for trace pesticides in water, and in particular relates to a magnetically modified nano-organic montmorillonite and an extraction and analysis method for pesticides in water. Background technique [0002] The detection of pollutant levels in environmental samples is an important part of environmental risk assessment. Appropriate pretreatment methods can help improve the sensitivity and accuracy of trace substance detection. The traditional pre-analytical treatment method requires a large amount of samples and a large amount of organic solvents, and is laborious and costly. There is an urgent need for an efficient pretreatment method to replace it, and it is particularly important to seek a rapid multi-residue analysis method under the situation of increasing environmental safety concerns. Magnetic solid-phase dispersive microextraction is a method with high efficiency, low toxicity an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 刘东晖申志刚周志强王鹏
Owner CHINA AGRI UNIV
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