Method for detecting fenpropathrin pesticides by fluorescent nanometer cadmium selenide (CdSe) quantum dot probe

A fluorescent nanometer and fenpropathrin technology are applied in the fields of fluorescence/phosphorescence, material excitation analysis, etc. to achieve the effects of good selectivity, good fluorescence performance and high fluorescence intensity

Inactive Publication Date: 2014-02-19
GUANGXI TEACHERS EDUCATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the report of using quantum dot CdSe fluorescent probe to detect fenpropathrin pesticide has not been seen yet.

Method used

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  • Method for detecting fenpropathrin pesticides by fluorescent nanometer cadmium selenide (CdSe) quantum dot probe

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of fluorescent nanometer CdSe quantum dot probe:

[0019] Take by weighing 0.04g selenium powder and join in the flask that 0.25g tri-n-butylphosphine and 1.3g dioctylamine are housed, leave standstill 10h, prepare selenium stock solution; Take 0.015g cadmium oxide and 0.14g stearic acid in three In the flask, heat to 165°C under the protection of argon to fully dissolve the cadmium oxide, and prepare the cadmium stock solution; Stir and heat to 305°C, inject the selenium stock solution taken out into the reaction vessel, continue to react at 285°C for 75 seconds, and cool the product to room temperature to prepare fluorescent nano-CdSe quantum dot probes.

Embodiment 2

[0021] A method utilizing fluorescent nanometer CdSe quantum dot probes to detect fenpropathrin pesticides:

[0022] 1. In the process of applying fluorescent nano-CdSe quantum dots to detect fenpropathrin pesticide in the fenpropathrin pesticide standard product, the fluorescent nano-CdSe quantum dot probe solution after dilution of 20 times is mixed with the fenpropathrin pesticide solution, wherein , the molar ratio of the fluorescent nanometer CdSe quantum dot probe solution to the fenpropathrin pesticide solution is 1:0.85, that is, figure 1 Medium Fluorescence Spectrum a.

Embodiment 3

[0024] A method utilizing fluorescent nanometer CdSe quantum dot probes to detect fenpropathrin pesticides:

[0025] All the other conditions are the same as step 1, only the molar ratio of fluorescent nano-CdSe quantum dot probe solution and fenpropathrin pesticide solution is changed to 1: 2.5, then get figure 1 Mid-fluorescence spectrum b.

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Abstract

The invention discloses a method for detecting fenpropathrin pesticides by a fluorescent nanometer cadmium selenide (CdSe) quantum dot probe. The fenpropathrin pesticides in a solution can be rapidly detected as fluorescence of fluorescent nanometer CdSe quantum dots can be quenched by fenpropathrin, a detection limit of the fenpropathrin pesticides can reach 2.5*10<-8>mol/L, and the correlation coefficient is 0.9997. The method disclosed by the invention is simple and convenient, high in sensitivity and high in selectivity, and further has the characteristics of high sensitivity and high selectivity in detecting fenpropathrin in mixed samples.

Description

technical field [0001] The invention belongs to the technical field of fenpropathrin pesticide detection, and in particular relates to a method for detecting fenpropathrin pesticide by using a fluorescent nanometer CdSe quantum dot probe. Background technique [0002] Fenpropathrin is a pyrethroid insecticide and acaricide with moderate toxicity. Fenpropathrin has contact killing, stomach poisoning and certain repelling effects, and has no fumigation and systemic effects. Fenpropathrin is a kind of nerve agent, which acts on the nervous system of insects and can make insects overexcited and even paralyzed and die. The drug has a wide insecticidal spectrum, fast knockdown effect, and long-lasting effect, and has good control effects on many pests and various spider mites. So far, the reported detection methods for fenpropathrin pesticides mainly include chromatography and immunoassay. These two methods are cumbersome to operate and require high costs. Therefore, it is immi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 肖琦黄珊盛家荣苏炜盛凯丘杭娜
Owner GUANGXI TEACHERS EDUCATION UNIV
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