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Ozone gas detecting element

A gas-sensitive, ozone-based technology, applied in measuring devices, instruments, scientific instruments, etc., can solve problems such as inaccurate measurement of ozone concentration, achieve simple and accurate measurement of ozone, and suppress interference

Inactive Publication Date: 2007-02-14
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the measurement method disclosed in Reference Document 4 has the problem of not being able to accurately measure the ozone concentration because the measurement is disturbed by nitrogen dioxide that coexists with ozone in the environment
This problem of nitrogen dioxide gas interfering with measurements is also present in other ozone measurement methods

Method used

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Embodiment Construction

[0063] Best Mode for Carrying Out the Invention

[0064] Embodiments of the present invention will be described below with reference to the accompanying drawings.

[0065] [1]

[0066] First, an example of an arrangement of an ozone gas sensitive element according to an embodiment of the present invention is explained. Figure 1A is a view of an example of an ozone gas analyzer arrangement using sensing element 102 according to an embodiment of the present invention, and Figure 1B is a partial section view. Figure 1A The analyzer shown in includes a light emitting unit 101 , a sensitive element 102 , a light receiving unit 103 , a converter / amplifier 104 , an A / D converter 105 and an output detector 106 . The light emitting unit 101 is, for example, an orange light LED having a light emission wavelength of about 611 nm as a central wavelength. The light receiving unit 103 is, for example, a photodiode, and has light receiving sensitivity at a wavelength of, for example, 19...

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PUM

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Abstract

This invention provides an ozone gas detecting element (102) comprising a porous body (121), which is porous glass with a plurality of micropores (122) having an average pore diameter of 4 mu m, a detecting agent (123) provided within the pore (122), and a selective transmission film (124) which is formed of a plastic film and is provided so as to cover the surface of the porous body (121). The selective transmission film (124) is formed of, for example, an organic polymer prepared using, as a monomer, a compound of a vinyl-containing chain molecule, such as polyacrylonitrile or PMMA and has a thickness of about 0.05 mu m to 1 mu m.

Description

technical field [0001] The invention relates to an ozone gas sensitive element for sensing ozone gas. Background technique [0002] Currently, by NO X Air pollution caused by , SPM (suspended particulate matter) and photochemical oxidants occurs not only in large cities but also in their surrounding areas and is considered to have a serious impact on the environment. Photochemical oxidants mainly contain substances with strong oxidizing properties such as ozone, which are produced by pollutants such as NO emitted from factories, business offices and motor vehicles. X Or hydrocarbons are formed by photochemical reactions after sunlight exposure, and produce photochemical smog. [0003] In Japan, environmental standards are set for these substances, and these substances are measured by general ambient gas measuring stations in many places. For example, although the average value of hourly measurements of photochemical oxidants is 60 ppb or less as an environmental standard,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/00G01N21/78G01N31/22
Inventor 丸尾容子小川重男阪田晴三田中融中村二朗国冈达也
Owner NIPPON TELEGRAPH & TELEPHONE CORP