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

A fluorescent nanometer and deltamethrin technology, which is applied in fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems of deltamethrin pesticides that have not yet been detected, and achieve strong anti-interference ability, easy operation, and good selectivity Effect

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

At present, there is no report on the detection of deltamethrin pesticide using fluorescent nano-CdSe quantum dot probes

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Preparation of fluorescent nanometer CdSe quantum dot probe:

[0020] Take by weighing 0.07g selenium powder and join in the flask that 0.35g tri-n-butylphosphine and 1.65g dioctylamine are housed, leave standstill 15h, prepare selenium stock solution; Take 0.03g cadmium oxide and 0.18g stearic acid in three In the flask, under the protection of argon, heat to 174°C to fully dissolve the cadmium oxide, and prepare the cadmium stock solution; Stir and heat to 314°C, inject the selenium stock solution taken out into the reaction vessel, continue to react at 294°C for 2 minutes, and cool the product to room temperature to prepare fluorescent nano-CdSe quantum dot probes.

Embodiment 2

[0022] A method utilizing fluorescent nanometer CdSe quantum dot probes to detect deltamethrin pesticides:

[0023] When using fluorescent nano-CdSe quantum dots to detect deltamethrin pesticides in deltamethrin pesticide standard products, mix the fluorescent nano-CdSe quantum dot probes diluted 40 times with the deltamethrin pesticide solution, and control the fluorescent nano-CdSe quantum dots. The molar ratio of point probe to deltamethrin pesticide solution is 1:0.59, that is, figure 1 Medium Fluorescence Spectrum a.

Embodiment 3

[0025] A method utilizing fluorescent nanometer CdSe quantum dot probes to detect deltamethrin pesticides:

[0026] The rest of the conditions are the same as in step 1, only the molar ratio of the fluorescent nano-CdSe quantum dot probe to the deltamethrin pesticide solution is changed to 1: 1.7, then the obtained figure 1 Mid-fluorescence spectrum b.

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Abstract

The invention discloses a method for detecting deltamethrin pesticides by a fluorescent nanometer cadmium selenide (CdSe) quantum dot probe. Given that the deltamethrin can quench fluorescence of the fluorescent nanometer CdSe quantum dot probe, and fluorescence intensity change values of the fluorescent nanometer CdSe quantum dot probe are in good linear relationship with the concentration of deltamethrin, the correlation coefficient is 0.9999, so that the deltamethrin pesticides in a solution can be detected rapidly and sensitively by the fluorescent nanometer CdSe quantum dot probe, and a detection limit of the deltamethrin pesticides can be as low as 1.3*10<-8>mol / L. The method disclosed by the invention is simple and convenient to operate, low in detection limit, high in sensitivity and further high in selectivity, and expected to achieve the highly sensitive detection of deltamethrin in real samples.

Description

technical field [0001] The invention belongs to the technical field of deltamethrin pesticide detection, and in particular relates to a method for detecting deltamethrin pesticide by using fluorescent nanometer CdSe quantum dot probes. Background technique [0002] Deltamethrin belongs to a kind of pyrethroid insecticide, which is currently the most toxic one among pyrethroid insecticides. Its poisonous effect on pests can reach 100 times that of DDT and more than 40 times that of parathion. . Deltamethrin has contact killing and stomach poisoning effects, rapid contact killing and strong knockdown power, but has no fumigation and systemic effects. It has repellent effect on some pests at high concentrations and has a long-lasting effect. Deltamethrin belongs to the category of poisoning, and it can cause irritation symptoms and red papules when it contacts the skin. Acute poisoning can cause headache, dizziness, nausea and loss of appetite, and even muscle fasciculation a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 盛家荣黄珊肖琦苏炜盛凯
Owner GUANGXI TEACHERS EDUCATION UNIV