Fluorescent CdSe nanometer quantum dot probe for pesticide dimethoate, and application thereof

A fluorescent nanometer and quantum dot technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, to achieve high fluorescence intensity, low detection limit, and simple and convenient detection process

Inactive Publication Date: 2013-01-02
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, there are no relevant reports on the use of quantum dot fluorescent probes for the detection of dimethoate pesticides

Method used

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  • Fluorescent CdSe nanometer quantum dot probe for pesticide dimethoate, and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of fluorescent nanometer CdSe quantum dot probe of dimethoate pesticide:

[0021] (a) in the glove box, take by weighing 0.15g selenium powder and join in the flask that 0.48g tri-n-butylphosphine and 3.3g dioctylamine are housed, make selenium stock solution;

[0022] (b) Get 0.03g of cadmium oxide and 0.23g of stearic acid in the three-mouth Schlenk reaction vessel, adopt Schlenk technology, fill with argon after vacuumizing with a vacuum pump, so repeat six times so that the reaction vessel is full of argon, and then heat to 175°C and keep it warm for 30 minutes to fully dissolve the cadmium oxide. After the reaction, the solution was down to room temperature to obtain a cadmium stock solution;

[0023] (c) Add 3.8g tri-n-octylphosphine oxide and 3.8g hexadecylamine to the prepared cadmium stock solution, adopt Schlenk technology, vacuumize with a vacuum pump and fill with argon, so repeat six times to make the reaction vessel Fill with argon, stir and ...

Embodiment 2

[0025] The application of the fluorescent nano-CdSe quantum dot probe of dimethoate pesticide in the detection of sensitivity of dimethoate pesticide:

[0026] 1. In the process of using the fluorescent nano-CdSe quantum dot probe of dimethoate as a fluorescent probe to detect dimethoate in the standard product of dimethoate, the fluorescent nanoprobe solution diluted 800 times is mixed with the dimethoate solution, The molar ratio of the fluorescent nano-CdSe quantum dot probe solution of dimethoate pesticide to the dimethoate pesticide solution is 1:29, and the fluorescence spectrum a is obtained.

[0027] 2. All the other conditions are the same as step 1, only the fluorescent nanometer CdSe quantum dot probe solution of dimethoate pesticide and the mol ratio of dimethoate pesticide solution are changed into 1: 58, then obtain fluorescence spectrum b;

[0028] 3. All the other conditions are the same as step 1, only the fluorescent nanometer CdSe quantum dot probe solution ...

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Abstract

The invention discloses a fluorescent CdSe nanometer quantum dot probe for pesticide dimethoate, and application of the probe. A preparation method of the fluorescent CdSe nanometer quantum dot probe for pesticide dimethoate comprises the steps of preparing selenium stock solution; preparing cadmium stock solution; and preparing the fluorescent CdSe nanometer quantum dot probe for pesticide dimethoate. The probe has detection limit up to 1.5*10<-7> mol/L for pesticide dimethoate. The preparation method has the advantages of simple operation method, rapid detection, and high sensitivity and selectivity for dimethoate in a mixed sample.

Description

technical field [0001] The invention belongs to the technical field of pesticide detection, and in particular relates to a fluorescent nanometer CdSe quantum dot probe of dimethoate pesticide and an application thereof. Background technique [0002] Dimethoate is a kind of quick-acting broad-spectrum sulfur-one-thiophosphoramide insecticide and acaricide. It has good control effect on mites in Arachnida, Lepidoptera and Homoptera in Insecta. effect. So far, dimethoate pesticides are mainly used to control rice and cotton pests, such as spider mites, scale insects, banana weevils, flower thrips, leaf rollers, and Spodoptera litura. Dimethoate can cause poisoning through the esophagus, skin and respiratory tract. Therefore, the analysis and detection of dimethoate pesticides is particularly important. So far, the detection methods of dimethoate pesticide mainly include high performance liquid chromatography, gas chromatography and immunoassay. However, these methods have di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04B82Y30/00
Inventor 肖琦黄珊崔建国甘春芳苏炜欧建珍
Owner GUANGXI TEACHERS EDUCATION UNIV
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