Formaldehyde detecting material, formaldehyde detector, formaldehyde detecting method and formaldehyde detecting reagent

Abstract

A formaldehyde detector (10) provided with a detecting reagent which develops a color in response to formaldehyde. The detector (10) comprises a detection element (30) having a base material (31) which constitutes an optical waveguide transmitting light via repeated total reflection and a mesoporous layer (32) which serves as the surface of the base material (31), is formed by laminating on at least a part of the light reflecting face and carries the detecting reagent as described above. Furthermore, it has a light emitting material which emits an incident light on the base material (31) and a light receiving material which receives the light outgoing from the base material (31). Furthermore, it has a signal processing section wherein the light signal from the light receiving material is received and a change in the optical properties based on the color development due to the reaction of formaldehyde with the detecting reagent is detected to thereby detect formaldehyde and measure its concentration from the change in the optical properties.

Description

technical field [0001] The invention relates to a formaldehyde detection body, a formaldehyde detection device, a formaldehyde detection method and a formaldehyde detection reagent. In particular, it relates to a formaldehyde detection body, a formaldehyde detection device, a formaldehyde detection method and a formaldehyde detection reagent for detection by utilizing changes in optical characteristics. Background technique [0002] (A method of detection using optical properties) One of the methods to detect formaldehyde so far utilizes infrared light absorption. That is to say, the C=O bond pair wave number of ketones and aldehydes containing formaldehyde is 1765-1645cm -1 Shows strong infrared light absorption characteristics. Ketones and aldehydes can be detected by detecting the degree of absorption in this wavenumber region. [0003] However, when analyzing mixed gases of ketones and aldehydes, since the absorption in this wavenumber region by the C=O bond is comm...

AI Technical Summary

Problems solved by technology

[0007] However, the advantage of the former method using chromatography is that it has good sensitivity and selectivity, and the disadvantage is that the operation is complicated.

Although the latter method using the detection tube is simple, the detection accuracy is low.

The disadvantage of both is that it is not practical

However, because the manufacturing process of these composite optical waveguides is very complicated, and prisms must be used, there is a problem of poor practicality.

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