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Near infrared sensor for detecting copper ions in solution

Rolinski, O.J. and Hatrick, D. and Birch, D.J.S. (1997) Near infrared sensor for detecting copper ions in solution. In: SPIE--The International Society for Optical Engineering, 1997-02-09, San Jose, CA, USA.

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Abstract

We have developed a fluorescence lifetime based energy transfer sensor for detecting copper(II) ions. Rhodamine 800 in Nafion selectively transfers its energy to copper ions when excited at 670 nm. By fitting to the fluorescence decay we can resolve copper concentrations in water down to the level of 10 ppb. Time-correlated single-photon counting is used for detection. Good discrimination against interference by cobalt, nickel and chromium ions is obtained by virtue of the reduced spectral overlap of these ions as compared to copper. Possibilities for an energy transfer sensor for both copper(I) and copper(II) ions are discussed. Application of the theory of resonance energy transfer is investigated for use in sensor matrices using a range of donors and acceptors and the appropriateness of current models discussed.

Item type: Conference or Workshop Item (Paper)
ID code: 18345
Keywords: fluorescence sensors, resonance energy transfer, copper ions, Nafion, Physics
Subjects: Science > Physics
Department: Faculty of Science > Physics
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 24 Mar 2010 20:38
    Last modified: 04 Oct 2012 17:33
    URI: http://strathprints.strath.ac.uk/id/eprint/18345

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