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Potentiometric detection of carboxylic acids by flow injection analysis using a tungsten oxide electrode

Citation

Chen, ZL and Alexander, PW, Potentiometric detection of carboxylic acids by flow injection analysis using a tungsten oxide electrode, Analytica Chimica Acta, 332, (2-3) pp. 187-192. ISSN 0003-2670 (1996) [Refereed Article]

DOI: doi:10.1016/0003-2670(96)00258-9

Abstract

Potentiometric flow injection (PFI) analysis of carboxylic acids based on a tungsten oxide electrode is described. The electrode is shown to offer high sensitivity and a stable baseline for the detection of carboxylic acids. The parameters affecting the electrode response such as the concentration of buffer, the pH and flow rate were studied in detail. The electrode exhibited a linear response for propionic acid in the concentration range of 2.5 x 10-4 M-5 x 10-3 M using a 5 x 10-4 M phosphate buffer at pH 6.5 as a carrier. The detection limits were found to be in the range of 1.0 x 10-5 M-5 x 10-5 M with a 20 μl injection.

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:12305
Year Published:1996
Web of Science® Times Cited:12
Deposited By:Applied Science
Deposited On:1997-08-01
Last Modified:2011-08-22
Downloads:0

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