Fluorescent nano Cd Se quantum dot probe of parathion pesticide and application thereof

A fluorescent nano-parathion technology, applied in the field of pesticide detection, can solve the problems of quantum dot fluorescent probes not being seen, and achieve the effect of simple and convenient detection process, good fluorescence stability and high fluorescence intensity

Inactive Publication Date: 2013-01-02
GUANGXI TEACHERS EDUCATION UNIV
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  • Fluorescent nano Cd Se quantum dot probe of parathion pesticide and application thereof

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Experimental program
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Effect test

Embodiment 1

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

[0021] (a) In the glove box, take 0.08g selenium powder and join in the flask that 0.25g tri-n-butylphosphine and 1.7g dioctylamine are housed, make selenium stock solution;

[0022] (b) Get 0.013g of cadmium oxide and 0.12g of stearic acid in three Schlenk reaction vessels, adopt Schlenk technology, fill with argon after evacuating with a vacuum pump, repeat this six times so that the reaction vessel is full of argon, and then heat to 183°C and keep it warm for 30min 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 2.0g tri-n-octylphosphine oxide and 2.0g hexadecylamine to the prepared cadmium stock solution, use Schlenk technology, vacuumize with a vacuum pump and fill with argon, repeat this six times to make the reaction vessel Filled with argon, stirred and heated to 302°C, then quickly injected the ...

Embodiment 2

[0025] Application of fluorescent nanometer quantum dot probe in detection of parathion pesticide:

[0026] 1. In the process of using fluorescent nano-CdSe quantum dots as fluorescent probes to detect parathion pesticides in parathion pesticide standard products, the fluorescent nanoprobe solution diluted 600 times is mixed with the parathion pesticide solution, wherein parathion The molar ratio of the phosphorous pesticide fluorescent nano-CdSe quantum dot probe solution to the parathion pesticide solution is 1:30, and the fluorescence spectrum a is obtained.

[0027] 2. All the other conditions are the same as step 1, only the mol ratio of the fluorescent nano CdSe quantum dot probe solution of the parathion pesticide and the parathion pesticide solution is changed to 1: 150, then the fluorescence spectrum b is obtained;

[0028] 3. All the other conditions are the same as step 1, only the fluorescent nano CdSe quantum dot probe solution of parathion pesticide and the mol r...

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Abstract

The invention discloses a fluorescent nano Cd Se quantum dot probe of a parathion pesticide and an application thereof. The preparation of the fluorescent nano quantum dot probe of the parathion pesticide includes preparing a selenium stock solution, preparing a cadmium stock solution, and preparing the fluorescent nano Cd Se quantum dot probe of the parathion pesticide by the cadmium stock solution and the selenium stock solution. When the fluorescent nano Cd Se quantum dot probe of the parathion pesticide is utilized as a fluorescent probe to detect the parathion pesticide, the limit of detection for the parathion pesticide can reach to 8.2*10-8mol/L. According to the fluorescent nano Cd Se quantum dot probe of the parathion pesticide and the application thereof, the method is simple in operation, the detection is rapid, the sensitivity is high, the selectivity is good, and during the parathion detection in a mixed sample, the sensitivity and the selective recognition are high.

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 for parathion pesticide and an application thereof. Background technique [0002] Parathion is a broad-spectrum insecticide and acaricide, has strong contact and stomach poisoning effects on pests, and is a cholinesterase inhibitor. There is also a certain fumigation effect in closed places. The insecticidal effect of parathion is closely related to the temperature. When the temperature is above 18°C, the fumigation effect is more obvious. The insecticidal effect increases with temperature above 18°C, but the drug effect period is correspondingly shortened. Parathion has no systemic insecticidal effect, but has strong penetrating power. The liquid medicine applied to the surface of plant leaves can penetrate into the leaves and kill aphids, leafhoppers and mites that feed on the back of leaves. The medicamen...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y40/00G01N21/64C09K11/88
Inventor 马建强肖琦黄珊崔建国苏炜骆芬萍
Owner GUANGXI TEACHERS EDUCATION UNIV
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