Potentiometric test strip

• Published in: Sensors and actuators. B, Chemical Vol. 24; no. 1; pp. 279 - 281
• Main Authors: Dumschat, Christa, Borchardt, Michael, Diekmann, Christoph, Cammann, Karl, Knoll, Meinhard
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 01.03.1995; Amsterdam Elsevier; New York, NY
• Subjects: Analytical chemistry; Chemistry; Electrochemistry; Electrodes: preparations and properties; Exact sciences and technology; General and physical chemistry; General, instrumentation; Ion-selective electrodes; Potassium sensor; Sodium sensor; Test strip; Potassium sensor; Test strip; Sodium sensor; Ion-selective electrodes; Ion selective electrode; Encapsulation; Disposable; Biological fluid; Redox couple; Sodium; Tape; Filter paper; Manufacturing; Potentiometry; Potassium; Reference electrode
• ISSN: 0925-4005; 1873-3077
• DOI: 10.1016/0925-4005(95)85060-0

A potentiometric test strip has been developed. It consists of an indicator electrode and a reference electrode. Both electrodes are prepared on filter paper as a microfibre matrix, encapsulated by the use of heat-sealing film and separated by an insulating plastic film or held at a distance during measurement. The reference electrode is a redox electrode. For the preparation of the ion-selective electrode a standard ion-selective PVC-matrix membrane cocktail is deposited in the microfibre matrix. Potassium- and sodium-sensitive test strips have been prepared and characterized. The electrochemical response of the potentiometric test strips is close to that of macro ion-sensitive electrodes using the same ion-selective membrane material. It should be possible to produce the test strips by mass-production technologies. So in future they may offer a new possibility for a more precise low-cost on-site determination of ions.