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A method for detecting cypermethrin pesticides using fluorescent nano-cdse quantum dot probes

A fluorescent nanometer and cypermethrin technology, which is applied in the fields of fluorescence/phosphorescence, material excitation analysis, etc., to achieve the effect of simple operation, high fluorescence stability and good selectivity

Active Publication Date: 2016-04-13
YINGDE GREATCHEM CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, the detection method of cypermethrin pesticide using fluorescent nano-CdSe quantum dot probe has not been reported

Method used

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  • A method for detecting cypermethrin pesticides using fluorescent nano-cdse quantum dot probes

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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 0.06g selenium powder and join in the flask that 0.3g tri-n-butylphosphine and 1.5g dioctylamine are housed, leave standstill 11h, prepare selenium stock solution; Take 0.02g cadmium oxide and 0.16g stearic acid in three In the flask, under the protection of argon, heat to 170°C to fully dissolve the cadmium oxide, and prepare the cadmium stock solution; Stir and heat to 310°C, pour the selenium stock solution taken out into the reaction vessel, continue to react at 290°C for 95 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 cypermethrin pesticides:

[0022] In the process of using fluorescent nano-CdSe quantum dots to detect cypermethrin pesticides in cypermethrin pesticide standard products, the fluorescent nano-CdSe quantum dot probes diluted 30 times were mixed with cypermethrin pesticide solution, and the fluorescent nano-CdSe quantum dot probes were mixed with cypermethrin pesticide solution The molar ratio is 1:0.24, that is, figure 1 Medium Fluorescence Spectrum a.

Embodiment 3

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

[0025] 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 cypermethrin pesticide solution is changed to 1:0.72, then the obtained figure 1 Mid-fluorescence spectrum b. .

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Abstract

The invention discloses a method for detecting cypermethrin pesticides by a fluorescent nanometer cadmium selenide (CdSe) quantum dot probe. According to a phenomenon that fluorescence of fluorescent nanometer CdSe quantum dot probe can be quenched by cypermethrin, the cypermethrin pesticides in a solution can be rapidly and sensitively detected by utilizing the linear relationship of fluorescence quenching, a detection limit of the cypermethrin pesticides can be as low as 2.7*10<-8>mol / L, and the correlation coefficient is 0.9997. The method disclosed by the invention is simple and convenient to operate, high in sensitivity, low in detection limit and high in selectivity. Furthermore,the method is expected to achieve the highly sensitive and selective detection of cypermethrin in real samples.

Description

technical field [0001] The invention belongs to the technical field of detection of cypermethrin pesticides, and in particular relates to a method for detecting cypermethrin pesticides by using fluorescent nanometer CdSe quantum dot probes. Background technique [0002] Cypermethrin belongs to a class of pyrethroid insecticides and is a moderately toxic agent. Cypermethrin insecticides are highly toxic to bees and silkworms and highly toxic to fish. Cypermethrin has a strong stimulating effect on skin and mucous membranes. So far, chromatography and immunoassays are mainly used for the detection of pyrethroid pesticides, but these two methods have the disadvantages of cumbersome operation and high cost. Therefore, it has become a development trend to establish an easy-to-operate and highly sensitive detection method for cypermethrin pesticides. [0003] In recent years, fluorescent nano-CdSe quantum dot probes have gradually attracted extensive attention of researchers. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/64
Inventor 黄珊肖琦盛家荣苏炜盛凯丘杭娜
Owner YINGDE GREATCHEM CHEM
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