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A Photo-Cured Calcium Ion-Selective Electrode for Use in Flow Injection Potentiometry that Tolerates High Perchlorate Levels

Citation

Dimitrakopoulos, T and Farrell, JR and Iles, PJ, A Photo-Cured Calcium Ion-Selective Electrode for Use in Flow Injection Potentiometry that Tolerates High Perchlorate Levels, Electroanalysis, 8, (4) pp. 391-395. ISSN 1040-0397 (1996) [Refereed Article]

DOI: doi:10.1002/elan.1140080417

Abstract

An improved photo-cured membrane selective to calcium was developed based on the calcium bis[4-(1,1,3,3-tetramethylbutyl)phenyl] phosphate ionophore and incorporates the lipophilic additive, potassium tetrakis(p-chlorophenyl)borate. The calcium electrode exhibited a hyper-Nernstian response of 31.0 mV change per activity decade and a log-linear range between 1 × 10-5 to 0.1 M in pure calcium chloride solution, in steady-state mode. The calcium electrode was fast responding, reaching 90% of steady-state value in 5 s making it ideal for flow injection measurements. The photo-cured electrode can measure calcium in a high perchlorate background, and was used to determine the total calcium level in full cream milk that was digested by a nitric/perchloric acid mixture. The results obtained were in good agreement with atomic absorption spectroscopy measurements.

Item Details

Item Type:Refereed Article
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Analytical Chemistry not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Dimitrakopoulos, T (Mr Telis Dimitrakopoulos)
ID Code:7684
Year Published:1996
Web of Science® Times Cited:26
Deposited By:Applied Science
Deposited On:1996-08-01
Last Modified:2011-08-19
Downloads:0

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