Multiwavelength detection for drift compensation in fiber optic chemical sensors

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Abstract

This paper describes results using a nonabsorbing wavelength as an internal reference to correct for nonanalyte-related signal changes and long-term drift in an absorbance-based fiber optic sensor. A renewable-reagent sensor developed for seawater pCO2 (CO2 partial pressure) was repetitively calibrated over a 12-day period and the drift in the calibration was studied. The results indicate that although the internal reference significantly improves the long-term performance, it does not fully correct for all sources of drift over the 12-day period.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsRobert A. Lieberman
PublisherPubl by Society of Photo-Optical Instrumentation Engineers
Pages216-223
Number of pages8
ISBN (Print)081941333X
StatePublished - 1994
EventChemical, Biochemical, and Environmental Fiber Sensors V - Boston, MA, USA
Duration: Sep 7 1993Sep 9 1993

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2068
ISSN (Print)0277-786X

Conference

ConferenceChemical, Biochemical, and Environmental Fiber Sensors V
CityBoston, MA, USA
Period09/7/9309/9/93

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