Colorimetric and refractometric measurements of carbon dioxide

C. Jesus Gouveia; A. Markovics; J. M. Baptista; B. Kovács; P. A. S. Jorge

doi:10.1117/12.892091

26 July 2011 Colorimetric and refractometric measurements of carbon dioxide

C. Jesus Gouveia, A. Markovics, J. M. Baptista, B. Kovács, P. A. S. Jorge

Proceedings Volume 8001, International Conference on Applications of Optics and Photonics; 80013C (2011) https://doi.org/10.1117/12.892091
Event: International Conference on Applications of Optics and Photonics, 2011, Braga, Portugal

Abstract

In this work, a polymeric sensitive layer based on the acid-base equilibrium of phenol and of its derivative p-nitro-phenol is presented for carbon dioxide measurements. Thin films casted on glass slides were tested, using a LED source (λc at 410 nm) and an Ocean Optics USB4000 spectrometer, in the 0% to 15.25% CO₂ concentrations range, showing a 40% maximum transmittance variation with a 51s response time and a 0.15% resolution. Preliminary results indicate that CO₂also induces refractive index changes in the sensitive layer. Using a fiber based interferometric setup, a CO₂ dependent refractive index change of ~0.045 RIU was observed, in the 0%-90% CO₂ concentration range.

Citation Download Citation

C. Jesus Gouveia, A. Markovics, J. M. Baptista, B. Kovács, and P. A. S. Jorge "Colorimetric and refractometric measurements of carbon dioxide", Proc. SPIE 8001, International Conference on Applications of Optics and Photonics, 80013C (26 July 2011); https://doi.org/10.1117/12.892091

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available