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Flow-injection potentiometric detection of phosphates using a metallic cobalt wire ion-selective electrode

Citation

Chen, ZL and De Marco, R and Alexander, PW, Flow-injection potentiometric detection of phosphates using a metallic cobalt wire ion-selective electrode, Analytical Communications, 34, (3) pp. 93-95. ISSN 1359-7337 (1997) [Refereed Article]

DOI: doi:10.1039/a700771j

Abstract

Flow-injection potentiometric detection of phosphate has been undertaken using a metallic cobalt wire ion-selective electrode. The electrode response to phosphate was characterised by potential readings of high stability versus a Ag/AgCl reference electrode, and results have shown that the electrode displays high sensitivity and selectivity towards the phosphate ion. The metallic cobalt wire electrode was used for the flow-injection potentiometric detection of phosphate using a 0.04 mol l-1 potassium hydrogen phthalate carrier at pH 5.0. A linear response with a slope of -38.00 ± 0.5 mV decade-1 change in phosphate activity was obtained in the range 1.0 × 10-5-5.0 × 10-3 mol l-1, and the detection limit was 1 × 10-6 mol l-1. The phosphate electrode described in this paper is robust, simple to use, highly selective, inexpensive and highly stable.

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
Author:Alexander, PW (Professor Peter Alexander)
ID Code:12353
Year Published:1997
Web of Science® Times Cited:45
Deposited By:Applied Science
Deposited On:1997-08-01
Last Modified:2011-08-15
Downloads:0

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