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Method for simply and quickly detecting residue of fenvalerate pesticide in soil

A technology for fenvalerate and fenvalerate, which is applied in the field of detection of fenvalerate pesticide residues in soil, can solve the problems of high determination cost of fenvalerate, cumbersome processing process and the like, and achieves a high degree of automation , The effect of low detection cost and reliable results

Active Publication Date: 2018-07-27
INST OF ANALYSIS GUANGDONG ACAD OF SCI (CHINA NAT ANALYTICAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the defects of high cost and cumbersome processing process for the determination of fenvalerate at present, and propose a simple and fast method for detecting fenvalerate pesticide residues in soil

Method used

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  • Method for simply and quickly detecting residue of fenvalerate pesticide in soil
  • Method for simply and quickly detecting residue of fenvalerate pesticide in soil

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] 1. Make a linear relationship diagram between the concentration of fenvalerate and the current:

[0027] 1. After the glassy carbon electrode is cleaned, the surface is drip-coated with a multi-walled carbon nanotube (MWNT)-nano-gold (AuNPs) composite suspension, and left to dry at room temperature to make a multi-walled carbon nanotube (MWNT)-gold nanoparticles (AuNPs) composite modified glassy carbon electrodes.

[0028] 2. Dissolve fenvalerate in acetonitrile to make a concentration of 1mmolL -1 For fenvalerate acetonitrile solution, add 0μL, 0.5μL, 10μL, 20μL, 40μL, 60μL 1mmolL to the glass container with 5mL phosphate buffer solution respectively -1 Fenvalerate solution, prepared at concentrations of 0, 0.1, 2.0, 4.0, 8.0 and 12 μmol L -1 fenvalerate electrolyte.

[0029] Take 0μL concentration as 1mmolL -1 Fenvalerate solution (blank) was placed in a glass container containing 5mL PBS (phosphate buffered saline) as CK (0μmol L -1 ).

[0030] Take 0.5μL conce...

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Abstract

The invention provides a method for simply and quickly detecting residue of fenvalerate pesticide in soil, and aims at overcoming the defects of high cost and complicated treatment process in the existing fenvalerate testing method. The method is characterized by comprising the following steps of I, manufacturing of a linear relationship map of fenvalerate concentration and current; a, manufacturing the linear relationship map of fenvalerate concentration and current; b, testing the fenvalerate concentration in a sample. The method has the beneficial effects that a glass carbon electrode modified by multi-wall carbon nanotube-nanogold compound is manufactured as a photoelectrical chemical sensor of fenvalerate for the first time; the method has the following beneficial effects: the property is stable, the result is reliable, the operation is simple and convenient, the automation degree is high, the result is directly displayed, and the professional person is not needed; the operation time is short, the analysis result can be obtained in 3 to 5min, the detection cost is low, the automation degree is high, the operation is simple and convenient, and the sampling amount is small; themethod is especially suitable for detecting the content of fenvalerate in the soil, and the complicated pretreatment process is not needed.

Description

technical field [0001] The invention relates to the technical field of agricultural production, in particular to the detection technology of fenvalerate pesticide residue in soil. Background technique [0002] Fenvalerate is a synthetic pyrethroid pesticide, which is widely used in tea production due to its wide insecticidal spectrum, abundant supply and relatively low price. In my country, fenvalerate is mainly used in the cultivation of cotton, tea, fruit trees and vegetables. However, fenvalerate is a highly toxic substance, with an acute oral LD50 of 451 mg / kg for rats, and higher toxicity for fish and aquatic invertebrates. [0003] Commonly used analysis methods for fenvalerate mainly include high pressure liquid chromatography, gas chromatography connected with electron capture detector and liquid mass spectrometry. Applying these physical and chemical analysis techniques to analyze trace amounts of fenvalerate residues in environmental, biological, and food samples...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 李维嘉潘叙恩王志强许泽群刘敏王李平黄璇莹霍柱健
Owner INST OF ANALYSIS GUANGDONG ACAD OF SCI (CHINA NAT ANALYTICAL
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