Fluorescent CdSe nanometer quantum dot probe for pesticide dimethoate, and application thereof
A fluorescent nanometer and quantum dot technology, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, to achieve high fluorescence intensity, low detection limit, and simple and convenient detection process
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Embodiment 1
[0020] Preparation of fluorescent nanometer CdSe quantum dot probe of dimethoate pesticide:
[0021] (a) in the glove box, take by weighing 0.15g selenium powder and join in the flask that 0.48g tri-n-butylphosphine and 3.3g dioctylamine are housed, make selenium stock solution;
[0022] (b) Get 0.03g of cadmium oxide and 0.23g 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 175°C and keep it warm for 30 minutes to fully dissolve the cadmium oxide. After the reaction, the solution was down to room temperature to obtain a cadmium stock solution;
[0023] (c) Add 3.8g tri-n-octylphosphine oxide and 3.8g hexadecylamine to the prepared cadmium stock solution, adopt Schlenk technology, vacuumize with a vacuum pump and fill with argon, so repeat six times to make the reaction vessel Fill with argon, stir and ...
Embodiment 2
[0025] The application of the fluorescent nano-CdSe quantum dot probe of dimethoate pesticide in the detection of sensitivity of dimethoate pesticide:
[0026] 1. In the process of using the fluorescent nano-CdSe quantum dot probe of dimethoate as a fluorescent probe to detect dimethoate in the standard product of dimethoate, the fluorescent nanoprobe solution diluted 800 times is mixed with the dimethoate solution, The molar ratio of the fluorescent nano-CdSe quantum dot probe solution of dimethoate pesticide to the dimethoate pesticide solution is 1:29, and the fluorescence spectrum a is obtained.
[0027] 2. All the other conditions are the same as step 1, only the fluorescent nanometer CdSe quantum dot probe solution of dimethoate pesticide and the mol ratio of dimethoate pesticide solution are changed into 1: 58, then obtain fluorescence spectrum b;
[0028] 3. All the other conditions are the same as step 1, only the fluorescent nanometer CdSe quantum dot probe solution ...
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