Colorimetric and refractometric measurements of carbon dioxide

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2011

Autores

Gouveia, C (Autor) Outra; Markovics, A (Autor) Outra; Baptista, JM (Autor) Outra; Kovacs, B (Autor) Outra; Jorge, PAS (Autor) FCUP

Ata de Conferência Internacional

Título: International Conference on Applications of Optics and Photonics

International Conference on Applications of Optics and Photonics

Braga, Portugal, 3 a 7 de Maio de 2011

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 1 Citação

Outras Informações

ID Authenticus: P-002-X8C

DOI: 10.1117/12.892091

Abstract (EN): 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 (lambda c 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 CO2 also induces refractive index changes in the sensitive layer. Using a fiber based interferometric setup, a CO2 dependent refractive index change of similar to 0.045 RIU was observed, in the 0%-90% CO2 concentration range.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5