Optical quantification of sodium, potassium, and calcium ions in diluted human plasma based on ion-selective liquid membranes

Ursula E. Spichiger-Keller; Kurt Seiler; Kemin Wang; Gaby Suter; Werner E. Morf; Wilhelm Simon

doi:10.1117/12.47131

1 September 1991 Optical quantification of sodium, potassium, and calcium ions in diluted human plasma based on ion-selective liquid membranes

Ursula E. Spichiger-Keller, Kurt Seiler, Kemin Wang, Gaby Suter, Werner E. Morf, Wilhelm Simon

Author Affiliations +

Proceedings Volume 1510, Chemical and Medical Sensors; (1991) https://doi.org/10.1117/12.47131
Event: ECO4 (The Hague '91), 1991, The Hague, Netherlands

Abstract

With the presented ion-selective optode membranes total ion concentrations of sodium, potassium, and calcium are measured reversibly with the same selectivity as in potentiometric systems. The optically sensing membranes combine the well established neutral carriers together with neutral so-called chromoionophores which change their absorption spectra in the VIS region upon complexation of hydrogen ions in the same membrane phase. Membranes are mounted in an optical flow-through cell with a volume of 300 (mu) l. All measurements are referred to a pair of blank-membranes in a reference cell to compensate for interferences induced by the sample. The response time is in the range of seconds. A good correlation to reference methods is achieved.

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Ursula E. Spichiger-Keller, Kurt Seiler, Kemin Wang, Gaby Suter, Werner E. Morf, and Wilhelm Simon "Optical quantification of sodium, potassium, and calcium ions in diluted human plasma based on ion-selective liquid membranes", Proc. SPIE 1510, Chemical and Medical Sensors, (1 September 1991); https://doi.org/10.1117/12.47131

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