NDLI: Temperature Compensation of Oxygen Sensing Films Utilizing a Dynamic Dual Lifetime Calculation Technique

Content Provider	IEEE Xplore Digital Library
Author	Collier, B.B. McShane, M.J.
Copyright Year	2001
Abstract	With advances to chemical sensing, methods for compensation of errors introduced by interfering analytes are needed. In this paper, a dual lifetime calculation technique was developed to enable simultaneous monitoring of two luminescence decays. Utilizing a windowed time-domain luminescence approach, the response of two luminophores is separated temporally. The ability of the dual dynamic rapid lifetime determination approach to determine the response of two luminophores simultaneously was investigated through mathematical modeling and experimental testing. Modeling results indicated that lifetime predictions will be most accurate when the ratio of the lifetimes from each luminophore is at least three and the ratio of intensities is near unity. In vitro experiments were performed using a porphyrin that is sensitive to both oxygen and temperature, combined with a temperature-sensitive inorganic phosphor used for compensation of the porphyrin response. In static experiments, the dual measurements were found to be highly accurate when compared with single-luminophore measurements-statistically equivalent for the long lifetime emission and an average difference of 2% for the short lifetimes. Real-time testing with dynamic windowing was successful in demonstrating dual lifetime measurements and temperature compensation of the oxygen sensitive dye. When comparing the actual oxygen and temperature values with predictions made using a dual calibration approach, an overall difference of <;1% was obtained. Thus, this method enables rapid, accurate extraction of multiple lifetimes without requiring computationally intense curve fitting, providing a significant advancement toward multianalyte sensing and imaging techniques.
Sponsorship	IEEE Sensors Council
Starting Page	2755
Ending Page	2764
Page Count	10
File Size	1071349
File Format	PDF
ISSN	1530437X
Volume Number	14
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Films Temperature measurement Temperature sensors Testing Biomedical measurement Delays error compensation Rapid lifetime determination luminescence dual sensors
Content Type	Text
Resource Type	Article
Subject	Instrumentation Electrical and Electronic Engineering

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