Journal article
Dynamic behavior of potentiometric ammonia-sensing probes in samples of high osmolarity
Analytica chimica acta, Vol.158(C), pp.379-382
1984
DOI: 10.1016/S0003-2670(00)84845-X
Abstract
Results are presented for potentiometric ammonia gas-sensors which show that the response times increase significantly with age of the sensor when ammonium picrate is used as internal electrolyte and the samples have greater osmolarities than the internal electrolyte solution. A build-up of ammonium picrate crystals on the inner side of the gas-permeable membrane is responsible for this increasein response time. The use of ammonium chloride as internal electrolyte provides constant response times indepent of sample osmotic strength, and is recommended as a means of ensuring that optimal dynamic response characteristics are maintained.
Details
- Title: Subtitle
- Dynamic behavior of potentiometric ammonia-sensing probes in samples of high osmolarity
- Creators
- Mark A ArnoldGarry A Rechnitz
- Resource Type
- Journal article
- Publication Details
- Analytica chimica acta, Vol.158(C), pp.379-382
- Publisher
- Elsevier B.V
- DOI
- 10.1016/S0003-2670(00)84845-X
- ISSN
- 0003-2670
- eISSN
- 1873-4324
- Language
- English
- Date published
- 1984
- Academic Unit
- Fraternal Order of Eagles Diabetes Research Center; Center for Biocatalysis and Bioprocessing; Chemistry
- Record Identifier
- 9984216614902771
Metrics
2 Record Views