12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Interdigitated electrode array based sensors fo...
View graph of relations

« Back

Interdigitated electrode array based sensors for monitoring of caesium

Research output: Contribution in Book/Report/ProceedingsConference contribution

Published

Publication date2010
Host publicationASME 12th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM09): Volume 2: Facility Decontamination and Decommissioning; Environmental Remediation; Environmental Management/Public Involvement
Place of publicationNEW YORK
PublisherAMER SOC MECHANICAL ENGINEERS
Pages485-494
Number of pages10
ISBN (Print)978-0-7918-4408-3
Original languageEnglish

Abstract

The requirement for on-line and in-situ monitoring of analytes in process and effluent streams and in ground waters has become increasingly more important in recent years. We therefore describe the development of the transduction element for a fully automated online instrument for the detection of caesium. The sensor layer for this instrument employs an Ion Selective Conductimetric microsensor (ISCOM) as the detector. This is based upon a plasticized polymeric membrane incorporating a selective ionophore, overlaying two interdigitated microclectrode arrays. A direct relationship has been observed between the bulk conductance (as determined by the microelectrodes) of the ionophore loaded membrane and the concentration of the primary ions in solution.

Caesium selective ISCOMs were prepared using a ion selective membrane containing the commercially available ionophore Calix[6]arene-hexaacetic acid hexaethyl ester, polyvinylchloride (PVC) and plasticiser Nitrophenylether (NPOE). Methods of ion selective membrane deposition have been investigated in order to obtain a maximal response. The relative levels of membrane components have also been varied in order to further enhance the ISCOM reponse. We also present preliminary data concerning the caesium selectivity 485 with respect to a range of possible interferents, including rubidium.