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Preparation method of perovskite quantum dot-molecular imprinted electrochemiluminescence sensor for detecting prometryn and detection application thereof

A technology of molecular imprinting and electrochemistry, which is applied in the direction of chemiluminescence/bioluminescence, electrochemical variables of materials, and analysis by making materials undergo chemical reactions, to achieve low detection limit, wide linear range and good applicability

Active Publication Date: 2021-04-06
NINGBO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no research reports on the preparation method and detection application of the perovskite quantum dot-molecularly imprinted electrochemiluminescence sensor for the detection of promethazin

Method used

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  • Preparation method of perovskite quantum dot-molecular imprinted electrochemiluminescence sensor for detecting prometryn and detection application thereof
  • Preparation method of perovskite quantum dot-molecular imprinted electrochemiluminescence sensor for detecting prometryn and detection application thereof
  • Preparation method of perovskite quantum dot-molecular imprinted electrochemiluminescence sensor for detecting prometryn and detection application thereof

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Effect test

specific Embodiment 1

[0033] 1. Preparation of MIP-ECL sensor

[0034] Place the pretreated glassy carbon electrode in CsPbBr containing 10.0 mg / mL 3 In the QDs (Shanghai Xingzi New Material Technology Development Co., Ltd., 10 mg) solution, the scanning speed was 50 mV / s, and the potential range was 0-1.6 V, and the scanning cycle was scanned 20 times, and the CsPbBr was obtained by electrodeposition. 3 - QDs / GCE, then CsPbBr 3 -QDs / GCE were placed in ethyl acetate solution containing 100.0 mmol / L o-aminophenol (o-AP, functional monomer) and 20.0 mmol / L promethazin (template molecule), at 50 mV / s under dark conditions Scanning rate, potential range 0-1.0V, cycle scanning polymerization 25 circles, to obtain MIP / CsPbBr embedded with promethazine template 3 -QDs / GCE polymeric membrane electrode, MIP / CsPbBr 3 -The QDs / GCE electrode was soaked in 20.0 mL of methanol and acetic acid mixed with a volume ratio of 7:3 for 20 min to remove embedded template molecules, then rinsed with deionized water a...

specific Embodiment 2

[0045] The perovskite quantum dot-molecularly imprinted electrochemiluminescence sensor used for detecting promethazin is used for the method for detecting promethazin, and the specific steps are as follows:

[0046] (1) Sample pretreatment

[0047] Accurately weigh 5.00 g ± 0.01 g fish sample and place it in a centrifuge tube, add 10.0 mL acetonitrile, and vortex for 1 min. Then 5.0 g NaCl and 1.5 g NaCl were added sequentially 2 SO 4 , sonication for 20 min, shaking for 20 min, 5×10 3 centrifuge at g for 10 min, and take the supernatant; take the precipitate and repeat the operation once, combine the two supernatants, and mix the supernatant with 10.0 mL of acetonitrile and n-hexane at a volume ratio of 1:10 to further remove Fat and pigment, vortex 5 min, 5×10 3 centrifuge for 15 min, take the supernatant and blow it with nitrogen at room temperature until nearly dry, add 1.0 mL of acetonitrile to redissolve to obtain the solution to be tested; if it is a seawater sam...

specific Embodiment 3

[0051]Analysis of factors affecting the performance of MIP-ECL sensors: the number of scan cycles, the ratio of template to functional monomer, the ratio of eluent, buffer pH, elution time, response time and the selection of co-reactants all have an important impact on the performance of the sensor , to optimize the above conditions to obtain the best experimental results.

[0052] 1. The influence of the number of scanning circles on the MIP-ECL sensor

[0053] The thickness of the molecularly imprinted polymer film has a great influence on the imprinting effect of template molecules, and the thickness of the polymer film can be adjusted by controlling the number of electropolymerization scanning cycles. The present invention has studied electropolymerization scanning circle number, and the result is as follows Figure 6 shown. In the first scan, an irreversible anodization peak appeared at 0.6 V, and as the number of cycles increased, the anodization peak current value dec...

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Abstract

The invention discloses a preparation method and application of a perovskite quantum dot-molecular imprinted electrochemiluminescence sensor for detecting prometryn. The method is characterized by comprising the following steps: putting a pretreated glassy carbon electrode into a CsPbBr3 QDs solution with the concentration of 10.0 mg / mL, circularly scanning for 20 circles under the conditions that the scanning speed is 50mV / s and the potential range is 0-1.6 V, and carrying out electrodeposition to obtain CsPbBr3-QDs / GCE; putting the perovskite quantum dot into an ethyl acetate solution containing o-aminophenol and prometryn, carrying out cyclic scanning polymerization for 25 circles to obtain an MIP / CsPbBr3-QDs / GCE polymer membrane electrode, and soaking the electrode in a solution formed by mixing methanol and acetic acid according to a volume ratio of 7: 3 so as to obtain the perovskite quantum dot-molecular imprinted electrochemiluminescence sensor for detecting prometryn. The method has the advantages of strong specificity, high sensitivity and high accuracy.

Description

technical field [0001] The invention relates to a detection method of prometon, in particular to a preparation method of a perovskite quantum dot-molecularly imprinted electrochemiluminescent sensor for detecting prometon and its detection application. Background technique [0002] Prometryn is one of the most widely used herbicides in my country, but its chemical properties are stable, difficult to degrade, and its half-life is as long as 13 months. Therefore, the widespread use of proturon leads to its pollution into the water with precipitation and surface water runoff, and it is easy to enter the human body through the food chain, endangering health. In addition, my country is a big country of aquatic products, but because of the extensive use of herbicides, it is easy to cause the net content of propellant in various aquatic products to exceed the standard, which may have a certain impact on the export trade of my country's aquatic products. [0003] So far, there are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/76G01N27/30B82Y40/00B82Y20/00
CPCG01N21/76G01N27/305B82Y40/00B82Y20/00
Inventor 史西志张泽明张蓉蓉徐锦锦孙爱丽陈炯
Owner NINGBO UNIV
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