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Method for testing fluorescence signal of oxygen concentration in water by enhancing oxygen sensitive film

An oxygen-sensitive film and fluorescent signal technology, which is applied in the direction of fluorescence/phosphorescence, measuring devices, and material analysis through optical means, can solve the problems of weak and unstable signals, achieve short film-making time, easy operation, and improve accuracy degree and the effect of linear correlation degree

Inactive Publication Date: 2018-06-29
ZHEJIANG UNIV KUNSHAN INNOVATION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When testing dissolved oxygen in water, the reflected signal end of the dissolved oxygen meter is on the same side as the receiving signal end, so the signal received by the pure oxygen sensitive membrane is weak and very unstable

Method used

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  • Method for testing fluorescence signal of oxygen concentration in water by enhancing oxygen sensitive film
  • Method for testing fluorescence signal of oxygen concentration in water by enhancing oxygen sensitive film
  • Method for testing fluorescence signal of oxygen concentration in water by enhancing oxygen sensitive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 4ml of tetraethyl orthosilicate and 3ml of dimethyldimethoxysilane in 10ml of ethanol and stir, slowly add 1ml of deionized water and 0.1ml of hydrochloric acid and stir for 2 hours, weigh 1.5g of barium sulfate Add the above solution and stir for 3h to form a milky white turbid solution. Soak the prepared oxygen-sensitive film (adhesive tape on one side of the substrate) in the turbid solution by dip coating, then take it out, put it in an oven for heat curing (30°C for 2h, 50°C for 2h, 80°C for 4h), and you can get Composite oxygen sensitive membrane.

Embodiment 2

[0030] Dissolve 4ml tetraethyl orthosilicate and 3ml dimethyldimethoxysilane in 10ml ethanol and stir, slowly add 1ml deionized water and 0.1ml hydrochloric acid and stir for 2 hours, weigh 0.4g carbon black The powder was added to the above solution and stirred for 3h to form a black turbid liquid. Soak the prepared oxygen-sensitive film (adhesive tape on one side of the substrate) in the turbid solution by dip coating, then take it out, put it in an oven for heat curing (30°C for 2h, 50°C for 2h, 80°C for 4h), and you can get Composite oxygen sensitive membrane.

Embodiment 3

[0032] Dissolve 4.5ml of tetraethyl orthosilicate and 2.5ml of dimethyldimethoxysilane in 10ml of ethanol and stir, slowly add 1ml of deionized water and 0.1ml of hydrochloric acid and stir for 2 hours, weigh 2.0g Barium sulfate was added to the above solution and stirred for 3 hours to form a milky white turbid solution. Soak the prepared oxygen-sensitive film (adhesive tape on one side of the substrate) in the turbid solution by dip coating, then take it out, put it in an oven for heat curing (30°C for 2h, 50°C for 2h, 80°C for 4h), and you can get Composite oxygen sensitive membrane.

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Abstract

The invention discloses a method for testing a fluorescence signal of oxygen concentration in water by an enhancing oxygen sensitive film. The method comprises the following steps: 1) dissolving polystyrene powder into toluene to form a transparent solution; adding PtTFPP (Platinum Tetrakis(pentafluorophenyl) Porphyrin) into the transparent solution to form an oxygen-sensitive solution; 2) coatinga substrate with the oxygen-sensitive solution and carrying out thermosetting to obtain an oxygen-sensitive film; 3) dissolving ethyl orthosilicate and dimethyldimethoxysilane into ethanol and stirring; after adding water and hydrochloric acid and stirring, adding carbon black or barium sulfate powder to form black or milk white turbid liquid; 4) taking acetic acid as a solvent and dissolving cellulose acetate to form a solution; adding the carbon black or barium sulfate powder to form black or milk white turbid liquid; 5) taking the acetic acid as a solvent and dissolving the cellulose acetate to form a solution; adding water into the solution to obtain a transparent solution; 6) wetting the oxygen-sensitive film prepared by step 2) into the solutions of steps 3), 4) and 5) in a dip-coating manner; taking out the oxygen-sensitive film and carrying out the thermosetting to obtain a composite sensing film.

Description

technical field [0001] The invention relates to a functional material for a sensor, in particular to a method for enhancing the fluorescence signal of oxygen concentration in water by compounding a layer of polymer film or sol-gel film on the oxygen sensitive film. Background technique [0002] Oxygen is the basic substance for the survival of living organisms. The detection of oxygen and dissolved oxygen is of great significance in many fields such as biology, medicine, environment and industrial process. Optical oxygen sensor is a sensing technology gradually developed in the mid-eighties. Most of these sensors are developed based on the principle that the fluorescence or phosphorescence of organic dyes, polycyclic aromatic hydrocarbons and metal complexes can be extinguished by oxygen fragmentation. It does not involve the mass consumption of oxygen, and the equilibration time is very short, so it can work normally at normal temperature and pressure, and it can also wor...

Claims

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Application Information

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IPC IPC(8): G01N21/64
CPCG01N21/643
Inventor 张纪斌严盼平陈玲华
Owner ZHEJIANG UNIV KUNSHAN INNOVATION INST
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