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Optical fiber sensor for selectively measuring concentration of p-chlorophenol

A technology of optical fiber sensor and p-chlorophenol, which is applied in phase influence characteristic measurement, color/spectral characteristic measurement, instruments, etc., to achieve rapid determination and high selectivity

Pending Publication Date: 2021-02-12
CHONGQING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few studies on molecularly imprinted polymers with selectivity to p-chlorophenol at present, and there are no related products or literature reports on optical fiber sensors based on the selectivity of molecularly imprinted polymers to determine the concentration of p-chlorophenol. The research on the optical fiber sensor for the selective determination of the concentration of p-chlorophenol by polymer is extremely important. This research will promote the selective determination of the concentration of p-chlorophenol and the monitoring and treatment of p-chlorophenol in the water environment

Method used

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  • Optical fiber sensor for selectively measuring concentration of p-chlorophenol
  • Optical fiber sensor for selectively measuring concentration of p-chlorophenol
  • Optical fiber sensor for selectively measuring concentration of p-chlorophenol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1, see figure 1 An optical fiber sensor for selectively measuring the concentration of p-chlorophenol, comprising a sensor housing 2, an input optical fiber 8, several receiving optical fibers 1, a concave reflector 5 and a mounting bracket; the receiving optical fiber 1 is selectively sensitive to p-chlorophenol An optical fiber, the rear section of the optical fiber selectively sensitive to p-chlorophenol is ground into a semicircular arc along the length direction, and the polished surface is coated with a molecularly imprinted polymer gel 3 that is selectively sensitive to p-chlorophenol;

[0018] The sensor housing 2 is cylindrical, the front part of the sensor housing 2 is a solid body, the rear part of the sensor housing 2 is a hollow body, and a liquid inlet slot is opened on the side wall of the hollow body; the solid body The center of the center is provided with an input fiber installation hole along the axial direction, and several receiving fiber in...

Embodiment 2

[0025] Example 2, see figure 2 , the preparation of receiving fiber 1:

[0026] Step A, preparation of molecularly imprinted polymer:

[0027] A1. First, place an appropriate amount of template molecule p-chlorophenol and functional monomer in 20 mL of acetonitrile solution, and mix them evenly by ultrasonication for 30 minutes; functional monomers can be methacrylic acid, acrylamide, methyl methacrylate, etc. The template molecule provides a template for the molecularly imprinted polymer, the functional monomer mainly provides, for example, a hydrogen bond functional group or a reactive substituent for forming a covalent bond with the template molecule, and acetonitrile serves as a solvent for the template molecule and the functional monomer.

[0028] A2, then disperse the crosslinking agent ethylene glycol dimethacrylate and the initiator azobisisobutyronitrile into the mixed solution obtained in step A1 to obtain a mixed solution of template molecules, functional monomers...

Embodiment 3

[0041] Example 3, in order to characterize the response performance of the optical fiber sensor for the selective determination of p-chlorophenol concentration based on molecularly imprinted polymer membranes, the real-time response of the optical fiber sensor to 0-300 mg / L concentration of p-chlorophenol was tested. The experimental results are as follows image 3 shown.

[0042] Depend on image 3 It can be seen that the D-type optical fiber sensor coated with the molecularly imprinted polymer gel film is sensitive to the light intensity of different concentrations of p-chlorophenol solutions. With the increase of the concentration of p-chlorophenol, the relative light intensity of the optical fiber sensor decreases. It is because the molecularly imprinted polymer gel film absorbs p-chlorophenol in water, which leads to the increase of the refractive index of the molecularly imprinted polymer gel film, which increases the transmission of the light transmitted in the optical ...

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Abstract

The invention discloses an optical fiber sensor for selectively measuring the concentration of p-chlorophenol. The optical fiber sensor comprises a sensor shell, an input optical fiber, a plurality ofreceiving optical fibers and a concave reflector; the optical fiber sensor is characterized in that each receiving optical fiber is an optical fiber selectively sensitive to parachlorophenol, the rear section of the optical fiber selectively sensitive to parachlorophenol is ground into a semi-circular arc shape in the length direction, and the ground surface is coated with molecularly imprinted polymer gel selectively sensitive to parachlorophenol; the sensor shell is cylindrical, the front part of the sensor shell is a solid body, the rear part of the sensor shell is a hollow body, and a liquid inlet notch is formed in the side wall of the hollow body; an input optical fiber mounting hole is formed in the center of the solid body in the axial direction, a plurality of receiving optical fiber mounting holes are formed in the outer side of the input optical fiber mounting hole, and the rear end of the input optical fiber enters a hollow body in the rear portion of the sensor shell through the input optical fiber mounting hole. The optical fiber sensor can be widely applied to the fields of environmental protection, chemical engineering, biochemical detection and the like.

Description

technical field [0001] The invention relates to an optical fiber sensor, in particular to an optical fiber sensor for selectively measuring the concentration of p-chlorophenol. Background technique [0002] Phenolic compounds are a very important organic compound in industrial production. They are not only widely used as raw materials in papermaking, printing and dyeing, textile and other industrial production, but also used as pesticides, plant growth regulators and herbicides in agricultural production. play a huge role. As a typical phenolic compound, p-chlorophenol is widely used in industries such as herbicides, fungicides, insecticides and the production of drugs and dyes, so it inevitably exists in the wastewater of many industries. However, p-chlorophenol has adverse effects on the eyes, skin, mucous membranes and upper respiratory tract and negatively affects biological processes. Many countries have made strict regulations on the residues of chlorophenols in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/41G01N21/25G01N21/31
CPCG01N21/41G01N21/255G01N21/31
Inventor 钟年丙刘慧敏赵雅赵明富罗彬彬常海星钟登杰汤斌
Owner CHONGQING UNIV OF TECH