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Digitale Medien

Optical sensor for ammonia based on the inner filter effect of fluorescence (1994)

Werner, Tobias ; Klimant, Ingo ; Wolfbeis, Otto S.

Springer

Journal of fluorescence 4 (1994), S. 41-44

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Details

ISSN: 1573-4994

Schlagwort(e): Lipophilic indicator ; optical ammonia sensing ; fluorescent particles ; inner filter effect

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract A new indicator-immobilization technique for the development of a sensor material for monitoring ammonia gas in aqueous solutions in presented. It is based on the change in absorbance intensity of a lipophilized pH indicator homogeneously dissolved in silicone rubber. Exposure to ammonia leads to a deprotonation of the indicator and this increases the absorbance of the base form of the indicator bromophenol blue. The sensor responds over a 17 μg/L to 17 mg/L concentration range, with a detection limit of 12 μg/L.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01876651

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