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Proceedings Paper

Measurement of dissolved carbon dioxide using colorimetric polymer films
Author(s): Andrew Mills; Lorraine Wild
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Paper Abstract

The hydrophobic bases tetradodecylammonium hydroxide (TDAOH) and tetrakisdecylammonium hydroxide (TKAOH) are to be used to solubilize the anionic form of m-cresol purple in ethyl cellulose to create a dry colorimetric thin polymer film sensor for CO2 in the gas phase or dissolved in solution. When used in aqueous solution, both TDAOH and TKAOH appear significantly more resistant to interference by protons or other ions at high concentration when compared with tetraoctylammonium hydroxide (TOAOH), the hydrophobic base which has been used for such work in previous studies. The TDAOH films are used as carbon dioxide sensors in aqueous solution at high ionic strength (e.g. 1 mol dm-3) and still appear blue at pH 1 after 1 h.

Paper Details

Date Published: 3 January 1995
PDF: 10 pages
Proc. SPIE 2631, Medical and Fiber Optic Sensors and Delivery Systems, (3 January 1995); doi: 10.1117/12.229172
Show Author Affiliations
Andrew Mills, Univ. of Wales Swansea (United Kingdom)
Lorraine Wild, Univ. of Wales Swansea (United Kingdom)

Published in SPIE Proceedings Vol. 2631:
Medical and Fiber Optic Sensors and Delivery Systems
Nathan I. Croitoru; Mitsunobu Miyagi; Guillermo Orellana; Annamaria Verga Scheggi; Henricus J. C. M. Sterenborg, Editor(s)

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