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Amperometric enzyme-based gas sensor for formaldehyde : impact of possible interferences

Title data

Achmann, Sabine ; Hämmerle, Martin ; Moos, Ralf:
Amperometric enzyme-based gas sensor for formaldehyde : impact of possible interferences.
In: Sensors. Vol. 8 (February 2008) Issue 3 . - pp. 1351-1365.
ISSN 1424-8220
DOI: https://doi.org/10.3390/s8031351

Official URL: Volltext

Project information

Project title:
Project's official titleProject's id
No informationHa 4424/ 1-1
No informationHa 4424/ 1-3

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

In this work, cross-sensitivities and environmental influences on the sensitivity and the functionality of an enzyme-based amperometric sensor system for the direct detection of formaldehyde from the gas phase are studied. The sensor shows a linear response curve for formaldehyde in the tested range (0 - 15 vppm) with a sensitivity of 1.9 μA/ppm and a detection limit of about 130 ppb. Cross-sensitivities by environmental gases like CO2, CO, NO, H2, and vapors of organic solvents like methanol and ethanol are evaluated as well as temperature and humidity influences on the sensor system. The sensor showed neither significant signal to CO, H2, methanol or ethanol nor to variations in the humidity of the test gas. As expected, temperature variations had the biggest influence on the sensor sensitivity with variations in the sensor signal of up to 10 % of the signal for 5 vppm CH2O in the range of 25 - 30 °C.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Functional Materials > Chair Functional Materials - Univ.-Prof. Dr.-Ing. Ralf Moos
Faculties
Faculties > Faculty of Engineering Science > Chair Functional Materials
Profile Fields > Advanced Fields > Advanced Materials
Research Institutions > Research Centres > Bayreuth Center for Material Science and Engineering - BayMAT
Profile Fields
Profile Fields > Advanced Fields
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 27 Jan 2015 12:57
Last Modified: 06 Apr 2016 09:38
URI: https://eref.uni-bayreuth.de/id/eprint/5988