Characterization of a novel dissolved CO2 sensor for utilization in environmental monitoring and aquaculture industry

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2013

Autores

Balogh, K (Autor) Outra; Joao M Jesus (Autor) Outra; Gouveia, C (Autor) Outra; Jorge O Domingues (Autor) Outra; Markovics, A (Autor) Outra; Baptista, JM (Autor) Outra; Kovacs, B (Autor) Outra; Carlos M Pereira (Autor) FCUP; Maria Teresa Borges (Autor) FCUP; Jorge, PAS (Autor) Outra

Ata de Conferência Internacional

Título: 8TH IBEROAMERICAN OPTICS MEETING AND 11TH LATIN AMERICAN MEETING ON OPTICS, LASERS, AND APPLICATIONS

8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications

Porto, PORTUGAL, JUL 22-26, 2013

Indexação

ISI Web of Knowledge - 5 Citações

Scopus - 3 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-006-K3X

DOI: 10.1117/12.2027518

Abstract (EN): A novel optical fiber sensor is presented for measuring dissolved CO2 for water quality monitoring applications, where the optical signal is based either on refractive index changes or on color change. The sensing chemistry is based on the acid-basic equilibrium of 4-nitrophenol, that is converted into the anionic form by addition quaternary ammonium hydroxide. The CO2 sensitive layer was characterized and tested by using simple absorbance/reflectance measurement setups where the sensor was connected to a fiber optic CCD spectrometer. A prototype simulating a real shallow raceway aquaculture system was developed and its hydraulic behavior characterized. A commercially available partial-pressure-NDIR sensor was used as a reference for dissolved CO2 tests with the new optical fiber sensor under development. Preliminary tests allowed verifying the suitability of the new optical sensor for accurately tracking the dissolved carbon dioxide concentration in a suitable operation range. Direct comparison of the new sensor and the reference sensor system allowed to demonstrate the suitability of the new technology but also to identify some fragilities there are presently being addressed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7