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Preparation method of photochemical composite sensitive film for hydrogen ion recognition

A photochemical, sensitive film technology, applied in material analysis by observing the influence of chemical indicators, and analysis by chemical reaction of materials, etc., can solve problems such as no mature theory or method, achieve low cost, expand sensitive The effect of range, good performance

Inactive Publication Date: 2006-06-21
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to choose indicators with different characteristics to form a recognizer that meets the desired characteristics, there is no mature theory or method at present, only through a large number of experiments and screening

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The steps of the preparation method of the photochemical composite sensitive membrane for hydrogen ion recognition are as follows:

[0013] 1) First, dissolve 55 grams of acrylamide in 20 ml of distilled water at a temperature of 35°C, filter, then cool the filtered liquid to room temperature, and then perform suction filtration. Vacuum drying at ℃ for 20 hours to obtain pure acrylamide;

[0014] 2) Dissolve 10 grams of pure acrylamide, 0.04 grams of ammonium persulfate, 0.15 grams of N, N methylene acrylamide, 0.01 grams of cresol violet, and 0.02 grams of bromophenol blue in 80 milliliters of distilled water, and use Nitrogen deoxygenation and gradually heating to 85 ° C to obtain H+ ion-sensitive polymers based on cresol violet and bromophenol blue;

[0015] 3) Use a high-speed centrifuge to rotate the above polymer to form a photochemical composite sensitive film.

Embodiment 2

[0017] The steps of the preparation method of the photochemical composite sensitive membrane for hydrogen ion recognition are as follows:

[0018] 1) First, dissolve 55 grams of acrylamide in 30 ml of distilled water at a temperature of 45°C, filter it, then cool the filtered liquid to room temperature, and perform suction filtration. Vacuum drying at ℃ for 30 hours to obtain pure acrylamide;

[0019] 2) Dissolve 10 grams of pure acrylamide, 0.05 grams of ammonium persulfate, 0.25 grams of N, N methylene acrylamide, 0.012 grams of cresol violet, and 0.022 grams of bromophenol blue in 85 milliliters of distilled water, and use Nitrogen deoxygenation and gradually heating to 95 ° C to obtain H+ ion-sensitive polymers based on cresol violet and bromophenol blue;

[0020] 3) Use a high-speed centrifuge to rotate the above polymer to form a photochemical composite sensitive film.

Embodiment 3

[0022] A method for preparing a photochemical composite sensitive membrane for hydrogen ion recognition, characterized in that the steps of the method are as follows:

[0023] 1) First, dissolve 55 grams of acrylamide in 25 ml of distilled water at a temperature of 40°C, filter, then cool the filtered liquid to room temperature, and then perform suction filtration. Vacuum drying at ℃ for 25 hours to obtain pure acrylamide;

[0024] 2) Dissolve 10 grams of pure acrylamide, 0.045 grams of ammonium persulfate, 0.20 grams of N, N methylene acrylamide, 0.011 grams of cresol violet, and 0.021 grams of bromophenol blue in 82 milliliters of distilled water, and use Deoxygenate with nitrogen and gradually heat up to 90°C to obtain H+ ion-sensitive polymers based on cresol violet and bromophenol blue;

[0025] 3) Use a high-speed centrifuge to rotate the above polymer to form a photochemical composite sensitive film.

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PUM

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Abstract

The invention discloses a photochemical composite sensitive film preparing method of hydrogen ion identification, which comprises the following steps: 1) dissolving 55 g acrylamide in the 20-30 ml distilled water; cooling the filtered liquid to the indoor temperature; airing the sucked liquid; crystallizing; drying in the vacuum to gain acrylamide; 2) dissolving 10 g pure acrylamide, 0.04-0.05 g ammonium persulphate, 0.15-0.25 g N, N methacrylamide, 0.01-0.012 g methacresol purple, 0.02-0.022 g bromophenol blue in the distilled water; removing oxide through nitrogen and heating gradually to gain the H + ionic sensitive polymer based on methacresol purple and bromophenol blue; 3) rotating the polymer through high speed centrifuger to form photochemical composite sensitive film. The invention can enlarge the sensitive scale of hydrogen ion effectively, which is applied for making the recognizer sensitive part of photochemical sensor.

Description

technical field [0001] The invention relates to the field of chemical analysis and testing, in particular to a method for preparing a photochemical composite sensitive membrane for hydrogen ion recognition. Background technique [0002] The combination of indicator chemistry and fiber optic technology constitutes a photochemical sensor. Compared with traditional electrochemical analysis, photochemical sensors have a series of advantages such as small size, no charge, strong anti-electromagnetic interference, and no pollution. They have broad applications in chemical reactions, environmental monitoring, biomedicine, and agricultural engineering. It has received extensive attention and research because of its application prospect. [0003] However, a prominent problem in the development of photochemical sensors at present is that the measurement range is too small, which is caused by the small sensitivity range of most available indicators to ions. Taking hydrogen ion recogn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 杨翠容范影乐李轶庞全
Owner HANGZHOU DIANZI UNIV
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