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Method for detecting methane by thin film fluorescent

A technology for fluorescence detection and methane, which is applied in the field of thin-film fluorescence spectrum detection, can solve the problems of easy volatilization, low solubility, and difficulty in realizing methane gas detection, etc., and achieve the effects of easy operation, simple production, and overcoming the volatilization of solvents

Inactive Publication Date: 2008-05-21
SHANXI UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

This study shows that Ananban-A has a good complexing ability for methane, but there is only the NMR signal of methane complexed in the solution
Due to the low solubility and volatility of methane in solution, it is difficult to detect methane gas

Method used

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  • Method for detecting methane by thin film fluorescent
  • Method for detecting methane by thin film fluorescent

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1). Weigh 0.0045g (5μmoL) of Cryptophane-A (Cryptophane-A), 50mg of polyvinyl chloride (PVC), and 100mg of dioctyl sebacate (DOS) and dissolve them in 2mL of redistilled tetrahydrofuran solution, Fully dissolved, configured into a colorless and transparent solution;

[0025] (2). Inject 0.2mL of the transparent solution into a high-speed rotating quartz plate with a micro-syringe, swirl for 0.5min to form a thin film, dry for 0.5h, and set aside;

[0026] (3). Seal a small air chamber with a quartz plate coated with a thin film and another blank quartz plate, and then fix it on the support for measuring the fluorescent film to detect its fluorescence intensity at 304nm, and then inject methane gas of unknown concentration with a syringe 100mL, methane will be clathrated by acupan-A, and its fluorescence intensity is detected again as 231nm;

[0027] (4) The fluorescence intensity of Acuban-A decreases after inclusion of methane. According to the experimental data, the...

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Abstract

The present invention discloses a firedamp detecting method by using a film fluorescent light. A main body molecule cryptophane-A, which can send the fluorescent light is prepared into the film with good toughness by using a cyclone technique. The firedamp gas is directed reacted with the element and covered by the cavity of the molecule cryptophane-A. The content of the firedamp is detected according to the change of the fluorescence spectrum before and after covering. With the reaction of the main body molecule cryptophane-A film prepared by the cyclone technique and the firedamp, the problems in the prior art that the solubility of the firedamp in organic solution is low and the organic solvent is easy to be volatilized are solved. The method has selectivity to the firedamp gas and is of low cost, easy to be operated, high response speed and can be used in the detection of the firedamp gas.

Description

technical field [0001] The invention relates to thin-film fluorescence spectrum detection technology, in particular to a method for thin-film fluorescence detection of methane gas. Background technique [0002] Methane is a flammable and explosive gas unique to coal mines, and it is also a major threat to coal mine safety production. For a long time, scientists have developed detection methods and instruments for gas concentration. The principles include: catalytic combustion method, optical interference method, thermal conductivity method and differential optical absorption method. However, there are few reports on the detection of methane concentration by chemical theory and methods. [0003] In 1993, Collet and his collaborators published on pages 1169-1171 of the 32nd volume of Angew that the small Anpan-A has a good complexing ability to methane, in (CDCl 2 ) 2 solution, the temperature is 298K, by 1 HNMR can observe signals of peaks separated from free methane mole...

Claims

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Application Information

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IPC IPC(8): G01N21/64
Inventor 张彩红张建彪双少敏董川
Owner SHANXI UNIV
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