Title:
検知管
Document Type and Number:
Japanese Patent JP7296106
Kind Code:
B2
Abstract:
To provide a detection tube capable of measuring density of acetaldehyde or ethanol even when a test object gas includes formaldehyde or methanol.SOLUTION: A detection tube 2 is configured so that: reaction particles in which sulfuric acid and chromium oxide are adhered to surfaces of carrier particles are filled in a detection tube body 10 to form a reaction agent 14; chemical change of acetaldehyde in a test object gas passing inside of the reaction agent 14 to acetic acid is caused; then a concentration of acetaldehyde is determined on the basis of a color change length of a detection agent 16 whose color is changed by pH change by the acetic acid. Between the reaction agent 14 and the detection agent 16, there is provided an adsorption agent 15 for causing the acetic acid to pass and adsorbing formic acid, and the formic acid generated from formaldehyde is adsorbed and does not reach the detection agent 16, so that the concentration of acetaldehyde in the test object gas including acetaldehyde and formaldehyde can be measured.SELECTED DRAWING: Figure 1
Inventors:
Shogo Saegusa
Kazumasa Miyazawa
Kazumasa Miyazawa
Application Number:
JP2019116646A
Publication Date:
June 22, 2023
Filing Date:
June 24, 2019
Export Citation:
Assignee:
Komei Rikagaku Corporation
International Classes:
G01N31/22; G01N31/00
Domestic Patent References:
| JP2014092487A | ||||
| JP52026289A | ||||
| JP6324049A | ||||
| JP2009257838A | ||||
| JP2006112992A | ||||
| JP2017173204A |
Other References:
AZUMA Michiyo et al.,“Efficacy of a Detector Tube Method in Formaldehyde Measurement”,INDUSTRIAL HEALTH,2003年,Vol.41, No.4,pp.306-312,DOI: 10.2486/indhealth.41.306
Attorney, Agent or Firm:
Patent Attorney Corporation Amagi International Patent Office
Shigeo Ishijima
Hideki Abe
Shigeo Ishijima
Hideki Abe