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A Photo-Cured Coated Wire Potassium Ion-Selective Electrode for Use in Flow Injection Potentiometry


Alexander, PW and Dimitrakopoulos, T and Hibbert, DB, A Photo-Cured Coated Wire Potassium Ion-Selective Electrode for Use in Flow Injection Potentiometry, Electroanalysis, 9, (11) pp. 813-817. ISSN 1040-0397 (1997) [Refereed Article]

DOI: doi:10.1002/elan.1140091102


A potassium ion selective electrode (ISE) is reported based on the epoxyacrylate polymer prepared from o-nitrophenyl octyl ether as the plasticizer and 2,2′-bis [3,4-(15-crown-5-)-2-nitrophenylcarbamoxymethyl]tetradecane (BME-44) as the ionophore. Several different electrodes were studied by photo-curing different membranes onto a silver wire (0.8mm i.d.), and the response characteristics were evaluated. The membranes prepared exhibited strong adhesion to the metal substrate and showed improved mechanical strength compared to poly(vinyl chloride)-based membranes. The sensor exhibited Nernstian response over a log-linear range of between 0.01 mM and 100mM, and was selective against the common interfering ions. Fast response reaching 90% of steady-state value in 5 s makes this sensor applicable for flow injection potentiometry measurements. The potassium ISE allows for accurate determinations of potassium in various water samples by flow injection potentiometry.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical chemistry
Research Field:Instrumental methods (excl. immunological and bioassay methods)
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the chemical sciences
UTAS Author:Alexander, PW (Professor Peter Alexander)
UTAS Author:Dimitrakopoulos, T (Mr Telis Dimitrakopoulos)
ID Code:12282
Year Published:1997
Web of Science® Times Cited:8
Deposited By:Applied Science
Deposited On:1997-08-01
Last Modified:2011-08-15

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