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Fluorescent nanometer CdSe quantum dot probe for phorate pesticide and application thereof

A technology of fluorescent nanometer and fluorescent probe, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve unseen problems, achieve low detection limit, high sensitivity, and simple and convenient detection process Effect

Inactive Publication Date: 2014-04-16
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0021] (a) In the glove box, take 0.18g selenium powder and join in the flask that 0.56g tri-n-butylphosphine and 3.8g dioctylamine are housed, make selenium stock solution;

[0022] (b) Get 0.03g cadmium oxide and 0.38g stearic acid in three Schlenk reaction vessels, 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, then heat To 180 DEG C and keep warm for 30min, make the cadmium oxide fully dissolve, after the reaction, the solution is down to room temperature, make the 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 heat to 320°C, then quickly inject the ...

Embodiment 2

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

[0026] 1. In the process of using the fluorescent nano-CdSe quantum dot probe of phorate pesticide as a fluorescent probe to detect phorate pesticide in the phorate pesticide standard product, the fluorescent nanoprobe solution diluted 500 times was mixed with phorate The pesticide solution is mixed so that the molar ratio of the fluorescent nano-CdSe quantum dot probe solution of the phorate pesticide to the phorate 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 molar ratio of the fluorescent nano-CdSe quantum dot probe solution of phorate pesticide and the phorate pesticide solution is changed to 1: 130, then the fluorescence spectrum b is obtained;

[0028] 3. All the other conditions are the same as in step 1, only the mol ratio of th...

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Abstract

The invention discloses a fluorescent nanometer CdSe quantum dot probe for a phorate pesticide and an application thereof. The preparation of the fluorescent nanometer quantum dot probe for a phorate pesticide comprises the following steps: (a) preparing a selenium stock solution; (b) preparing a cadmium stock solution; (c) preparing the fluorescent nanometer CdSe quantum dot probe for a phorate pesticide by the cadmium stock solution and the selenium stock solution. When the fluorescent nanometer CdSe quantum dot probe for a phorate pesticide is used as a fluorescent probe for detecting a phorate pesticide, the detection limit for the phorate pesticide can reach 7.4*10-8 mol / L. The probe of the invention is simple in operation method, rapid in detection, high in sensitivity, and good in selectivity, and has the characteristics of high sensitivity and high selective identification when used for detecting phorate 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 phorate pesticide and an application thereof. Background technique [0002] Phorate is a highly toxic, efficient, and broad-spectrum systemic insecticide and acaricide. It has contact killing, stomach poisoning, and fumigation effects. It is effective for both piercing and chewing mouthparts, such as aphids, Planthoppers, thrips, red spiders, leaf miners, scorpion beetles, weevils, flea beetles, mole crickets, needle beetles, etc. Less effective against Lepidoptera larvae. After phorate enters the plant, it is transformed into more toxic oxides (sulfoxide, sulfone) by the influence of plant metabolism, and the activity of acetylcholinesterase in the nervous tissue of the insects is inhibited after feeding on insects, thus destroying the normal conduction of nerve impulses, leading to poisoning and even de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04B82Y30/00G01N21/64
Inventor 黄珊肖琦马建强崔建国苏炜梁作翠
Owner GUANGXI TEACHERS EDUCATION UNIV