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The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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A fluorescence energy transfer sensor for metal ions

Holmes, A.S. and Lopez, M.A. and Rolinski, O.J. and Birch, D.J.S. and Darbyshire, M. (1995) A fluorescence energy transfer sensor for metal ions. In: Proceedings of SPIE - The International Society for Optical Engineering. SPIE, pp. 171-181. ISBN 0819417351

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Abstract

There is presently considerable interest world-wide in fabricating sensors based on miniaturized analytical techniques encapsulated in sensing elements with an inbuilt intelligence capable of distinguishing between different analytes. For example, the measurement of metal ion concentration in fluid media is a common requirement when monitoring many types of industrial processes and chemical reactions. In addition there is an increasing requirement for the remote determination of trace elements in water.We report a new type of remote optical sensor of metal ions in solution based on fluorescence lifetime quenching due to dipoledipole energy transfer across a polymer-water interface. Ion selectivity is provided by spectral overlap between the sensor fluorescence and metal ion absorption. The sensor is demonstrated in the detection of cobalt ions in water at levels down to 17 fig.