Chemically selective optode membranes and optical detection modes

Ursula E. Spichiger-Keller; Daniel Freiner; Markus Lerchi; Eric Bakker; Rene Dohner; Wilhelm Simon

doi:10.1117/12.143555

30 April 1993 Chemically selective optode membranes and optical detection modes

Ursula E. Spichiger-Keller, Daniel Freiner, Markus Lerchi, Eric Bakker, Rene Dohner, Wilhelm Simon

Proceedings Volume 1796, Chemical, Biochemical, and Environmental Fiber Sensors IV; (1993) https://doi.org/10.1117/12.143555
Event: Fibers '92, 1992, Boston, MA, United States

Abstract

The principle of optodes has been shown to be efficient. Optodes are based on conventional ion-selective liquid membranes coupled with an indicator as an optical transducing agent. Calcium, sodium, potassium, and ammonium were assayed in real samples as well as the biological relevant trace elements zinc and lead in aqueous solutions. However, some kind of drawbacks were observed which can be eliminated by an improved optical measuring technique. A considerable gain in sensitivity of the optical measurements is achieved for clinical analysis of total potassium concentrations in plasma by the evanescent wave technique (ATR). For the sodium optode the analytical error is shifted towards the allowable range. Furthermore, the adsorption of biological sample components at the surface of the PVC- membrane does not influence the optical signal.

Citation Download Citation

Ursula E. Spichiger-Keller, Daniel Freiner, Markus Lerchi, Eric Bakker, Rene Dohner, and Wilhelm Simon "Chemically selective optode membranes and optical detection modes", Proc. SPIE 1796, Chemical, Biochemical, and Environmental Fiber Sensors IV, (30 April 1993); https://doi.org/10.1117/12.143555

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available