DC-RESISTOMETRIC UREA SENSITIVE DEVICE UTILIZING A CONDUCTING POLYMERFILM FOR THE GAS-PHASE DETECTION OF AMMONIA

Authors
PALMQVIST E KRIZ CB SVANBERG K KHAYYAMI M KRIZ D
Citation
E. Palmqvist et al., DC-RESISTOMETRIC UREA SENSITIVE DEVICE UTILIZING A CONDUCTING POLYMERFILM FOR THE GAS-PHASE DETECTION OF AMMONIA, Biosensors & bioelectronics, 10(3-4), 1995, pp. 283-287
Citations number
8
Categorie Soggetti
Biothechnology & Applied Migrobiology",Biophysics
Journal title
Biosensors & bioelectronics → ACNP
ISSN journal
09565663
Volume
10
Issue
3-4
Year of publication
1995
Pages
283 - 287
Database
ISI
SICI code
0956-5663(1995)10:3-4<283:DUSDUA>2.0.ZU;2-P
Abstract
The construction of an urea sensitive device based on a conducting pol ymer is described. The conducting polymer (polypyrrole) was exposed on ly to a gas-phase; this led to a significant improvement in its stabil ity. A DC-resistometric measuring principle was used, which required o nly simple measuring equipment. The device responded rapidly to betwee n 0 and 500 mM urea, with resistance changes of between 0 and 400 Ohms . The measurement of the urea content of a sample and subsequent regen eration took 20 min.