Journal article
Ionophore-based ion optodes without a reference ion: electrogenerated chemiluminescence for potentiometric sensors
The Analyst, Vol.137(21), pp.4988-4994
2012
Abstract
We report here on an electrogenerated chemiluminescence (ECL) readout for potentiometric ion-sensors, thereby offering an optical sensor output without the need for a reference ion (typically the hydrogen ion) that inconveniences ionophore based optical sensor principles. The compartment for ECL generation is physically separated from the sample by a bridge, and no current flows through the sample compartment. Here, three different types of ion selective membranes (Ca2+, Na+ and K+) are read-out individually and sequentially with this methodology. The repeatabilities are found as 0.5 to 1% of integrated light output, which translates into a relative uncertainty in the activity measurement of about 10%. This uncertainty appears to originate primarily at the ECL generating gold electrode, not at the potentiometric sensor. Other analytical figures of merit such as measuring range, sensitivity, optimal applied potential for ECL generation, and ion selectivity are also described.
Details
- Title
- Ionophore-based ion optodes without a reference ion: electrogenerated chemiluminescence for potentiometric sensors
- Authors
- G A Crespo (Author) - University of Geneva, SwitzerlandEric Bakker (Author) - University of Geneva, Switzerland
- Publication details
- The Analyst, Vol.137(21), pp.4988-4994
- Publisher
- Royal Society of Chemistry (R S C) Publications
- Date published
- 2012
- DOI
- 10.1039/c2an35516g
- ISSN
- 0003-2654
- Organisation Unit
- University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99450228302621
- Output Type
- Journal article
Metrics
5 File views/ downloads
317 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Web Of Science research areas
- Chemistry, Analytical