Utilize este identificador para referenciar este registo: http://hdl.handle.net/10348/8995
Título: New developments on fibre optic colorimetrie sensors for dissolved CO2 in aquatic environments
Autor: Coelho, L.
Pereira, Carlos
Mendes, João
Almeida, José Manuel Marques Martins De
Kovacs, B.
Balogh, K.
Borges, Teresa
Jorge, Pedro A. S.
Palavras-chave: Colorimetric sensor
Fibre optic sensor
Sensitive membrane
Dissolved carbon dioxide
Data: 2017
Editora: IEEE
Citação: Coelho, L.; Pereira, Carlos; Mendes, Joao; Martins de Almeida, José Manuel Marques; Kovacs, B.; Balogh, K.; Borges, Teresa; Pedro A. S. Jorge. New developments on fibre optic colorimetrie sensors for dissolved CO<inf>2</inf> in aquatic environments, Trabalho apresentado em OCEANS 2017 - Aberdeen, In OCEANS 2017 - Aberdeen, Aberdeen, United Kingdom, 2017.
Resumo: The detection of dissolved carbon dioxide (dCO2) is made possible through a colorimetric effect that occurs in a sensitive membrane. The reaction with dCO2 changes the pH of the membrane causing a small difference in its colour which results in a characteristic absorbance spectrum band near 435 nm. A sensing platform based on this effect was developed and tested in gaseous and in aqueous environments. It is a combination of a bundle of large core fibre optics (with diameters above 200 µm) with light emission diodes (LEDs) in the visible range of the spectrum, a silicon photodetector and a polymer membrane sensitive to CO2. A variation in the absorption of 3 / %VV was obtained in the range from 0 to 1.6 % of gaseous CO2 with an estimated response time below 60 seconds.
URI: http://hdl.handle.net/10348/8995
Outros identificadores: 978-1-5090-5278-3
Tipo de Documento: Artigo
Aparece nas colecções:DFIS - Artigo de Conferência em Revista Científica Indexada

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