EQUILIBRIUM STUDIES ON COLORIMETRIC PLASTIC FILM SENSORS FOR CARBON-DIOXIDE


Autoria(s): Mills, Andrew; Chang, Q.; Mcmurray, N.
Data(s)

1992

Resumo

The equilibrium responses of three new colorimetric plastic film sensors for CO2 as a function of % CO2 and temperature are described. The results fit a model in which there is a 1:1 equilibrium reaction between the deprotonated form of the dye (present in the film as an ion pair) and CO2. The 0-50% and 0-90% response and recovery times of each of these films when exposed to an alternating atmosphere of air and 5% CO2 are determined and in two cases are typically less than 3 s. The shelf life of the films is long (many months); however, prolonged use of the films leads to the permanent generation of the protonated form of the dye over a period of 20-100 h. A possible cause of this latter effect is discussed.

Identificador

http://pure.qub.ac.uk/portal/en/publications/equilibrium-studies-on-colorimetric-plastic-film-sensors-for-carbondioxide(fb9bfda5-edcd-468b-b05e-66266f051b5b).html

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Mills , A , Chang , Q & Mcmurray , N 1992 , ' EQUILIBRIUM STUDIES ON COLORIMETRIC PLASTIC FILM SENSORS FOR CARBON-DIOXIDE ' Analytical Chemistry , vol 64 , pp. 1383-1389 .

Tipo

article