Fluorescent nano-CdSe quantum dot probe of acephate pesticide and application of fluorescent nano-CdSe quantum dot probe

An acephate, fluorescent nanotechnology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve unseen and other problems, achieve low detection limit, high sensitivity and simple detection process handy effect

Inactive Publication Date: 2012-12-26
GUANGXI TEACHERS EDUCATION UNIV
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  • Claims
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Problems solved by technology

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  • Fluorescent nano-CdSe quantum dot probe of acephate pesticide and application of fluorescent nano-CdSe quantum dot probe

Examples

Experimental program
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Effect test

Embodiment 1

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

[0021] (a) In a glove box, weigh 0.12 g of selenium powder and add it to a flask containing 0.38 g of tri-n-butylphosphine and 2.5 g of dioctylamine to prepare a selenium stock solution.

[0022] (b) Get 0.02g of cadmium oxide and 0.25g 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 180°C and keep it warm for 30min to fully dissolve the cadmium oxide. After the reaction, the solution was lowered to room temperature to obtain a cadmium stock solution.

[0023] (c) Add 2.5g tri-n-octylphosphine oxide and 2.5g hexadecylamine to the prepared cadmium stock solution, adopt Schlenk technology, vacuumize with a vacuum pump and fill with argon, repeat this six times to make the reaction vessel Filled with argon, stirred...

Embodiment 2

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

[0026] 1. In the process of using the fluorescent nano-CdSe quantum dot of acephate pesticide as a fluorescent probe to detect acephate pesticide, the fluorescent nano-CdSe probe solution of acephate pesticide diluted 500 times with acephate The phosphorus pesticide solution was mixed so that the molar ratio of the probe to the acephate pesticide was 1:30, and the fluorescence spectrum a was obtained.

[0027] 2. All the other conditions are the same as in step 1, only the mol ratio of the fluorescent nano-CdSe probe of the acephate pesticide to the acephate pesticide is changed to 1: 130, then the fluorescence spectrum b is obtained;

[0028] 3. All the other conditions are the same as step 1, only the fluorescent nano-CdSe probe of the acephate pesticide and the mol ratio of the acephate pesticide are changed to 1: 320, then the fluorescence s...

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Abstract

The invention discloses a fluorescent nano-CdSe quantum dot probe of acephate pesticide and application of the fluorescent nano-CdSe quantum dot probe. The fluorescent nano-CdSe quantum dot probe of acephate pesticide is prepared by the following steps: (a) preparing a selenium stock solution; (b) preparing a cadmium stock solution; and (c) preparing the fluorescent nano-CdSe quantum dot probe of acephate pesticide by using the selenium stock solution and the cadmium stock solution. The limit of detection for acephate pesticide can achieve 9.4*10 <-8>mol/L when the fluorescent nano-CdSe quantum dot probe of acephate pesticide is used as a fluorescent probe to detect acephate pesticide. The method disclosed by the invention has the characteristics of simple operation, rapid detection, high sensitivity and good selectivity, and has the characteristic of high-sensitivity and high-selective identification when detecting acephate in mixed samples.

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 acephate pesticide and an application thereof. Background technique [0002] Acephate is a systemic insecticide, which has stomach poisoning and contact killing effects, and can kill eggs. It has a certain fumigation effect and is a slow-acting insecticide. After spraying, the initial effect is slow, the effect is remarkable in 2-3 days, and the aftereffect is strong. Its basic insecticidal principle is to inhibit insect acetylcholinesterase. It is suitable for vegetables, tea trees, tobacco, fruit trees, cotton, rice, wheat, rapeseed and other crops to prevent and control a variety of chewing, piercing and sucking mouthpart pests and harmful mites. So far, the detection methods of acephate pesticide mainly include high performance liquid chromatography, gas chromatography and immunoassay. However, these...

Claims

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Application Information

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IPC IPC(8): C01B19/04B82Y30/00
Inventor 黄珊肖琦马建强崔建国苏炜罗秋玲
Owner GUANGXI TEACHERS EDUCATION UNIV
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