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

A technology of flucyvalerate and fluorescent nanometers, which is applied in the fields of fluorescence/phosphorescence, material excitation analysis, etc., to achieve the effects of high fluorescence intensity, good fluorescence performance and high sensitivity

Active Publication Date: 2014-02-19
江苏广海检验检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are almost no reports on the detection of flucyvalerate pesticides using quantum dot CdSe fluorescent probes

Method used

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  • Method for detecting flucythrinate 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 0.03g selenium powder and join in the flask that 0.22g tri-n-butylphosphine and 1.2g dioctylamine are housed, leave standstill 12h, prepare selenium stock solution; Take 0.012g cadmium oxide and 0.12g stearic acid in three In the flask, heated to 162°C under the protection of argon to fully dissolve the cadmium oxide to prepare a cadmium stock solution; add 1.2g tri-n-octylphosphine oxide and 1.2g hexadecylamine to the prepared cadmium stock solution, Stir and heat to 302°C, inject the selenium stock solution taken out into the reaction container, continue to react at 282°C for 70 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 flucyvalerate pesticides:

[0022] In the process of using fluorescent nano-CdSe quantum dots to detect flucyvalerate pesticide in the flucyvalerate pesticide standard product, the fluorescent nano-CdSe quantum dot probe solution diluted 15 times was mixed with the flucyvalerate pesticide solution, Wherein, the molar ratio of fluorescent nanometer CdSe quantum dot probe solution to flucyvalerate pesticide solution is 1: 0.66, namely obtains figure 1 Medium Fluorescence Spectrum a.

Embodiment 3

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

[0025] All the other conditions are the same as step 1, only the molar ratio of fluorescent nanometer CdSe quantum dot probe solution and flucyvalerate pesticide solution is changed to 1: 3.3, then get figure 1 Mid-fluorescence spectrum b.

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Abstract

The invention discloses a method for detecting flucythrinate pesticides by a fluorescent nanometer cadmium selenide (CdSe) quantum dot probe. The fluorescence intensity of fluorescent nanometer CdSe quantum dots is changed due to the interaction of the fluorescent nanometer CdSe quantum dots and flucythrinate,the flucythrinate pesticides in a solution can be rapidly detected, and a detection limit of the flucythrinate pesticides can reach 5.1*10<-8>mol / L. The method disclosed by the invention is simple and convenient to operate, rapid in detection, and high in selectivity, and has the characteristics of high sensitivity and high selectivity in detecting flucythrinate in mixed samples.

Description

technical field [0001] The invention belongs to the technical field of flucyvalerate pesticide detection, and in particular relates to a method for detecting flucyvalerate pesticide by using a fluorescent nanometer CdSe quantum dot probe. Background technique [0002] Flucyvalerate belongs to the pyrethroid pesticides and is a moderately toxic insecticide. Flucyvalerate is mainly contact and stomach poisoning, without fumigation and systemic effects, it is a broad-spectrum insecticide with broad insecticidal spectrum and rapid efficacy. It can be effectively used in cotton, vegetables, fruit trees and other crops to control Lepidoptera, Homoptera, Diptera, Coleoptera and other pests, and it also has a certain inhibitory effect on spider mites. Flucyvalerate can be mixed with common insecticides and fungicides, and is highly toxic to fish and bees. Up to now, the detection methods of flucyvalerate pesticide mainly include chromatography and immunoassay, but these two method...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 黄珊肖琦盛家荣苏炜盛凯何惠婷
Owner 江苏广海检验检测有限公司
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