Fiber optic fluorescence sensor for carbon tetrachloride

Ashutosh Sharma; A. Z. Fasihi

doi:10.1117/12.170673

10 March 1994 Fiber optic fluorescence sensor for carbon tetrachloride

Ashutosh Sharma, A. Z. Fasihi

Proceedings Volume 2068, Chemical, Biochemical, and Environmental Fiber Sensors V; (1994) https://doi.org/10.1117/12.170673
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

A carbon tetrachloride sensor is presented that is based on a novel approach that involves quenching of the fluorescence emission from the second excited state (S_o $IMP S₂ transition) of a dye, congo red, and an air purge mechanism. The Stern-Volmer plot for the sensor response towards carbon tetrachloride in air is linear over the investigated concentration range, 0 - 5 mM, with a K_sv value of 84.85 M^-1. The detection limit was found to be 47 (mu) M CCl₄ in air. It is suggested that the operating fluorescence quenching process is diffusion controlled and collisional in nature. The sensor is fully reversible with an analytical response time < 25 s and recovery time < 2 s. The environmental applications of this sensor that is capable of providing a reference signal, while in-situ, are discussed.

Citation Download Citation

Ashutosh Sharma and A. Z. Fasihi "Fiber optic fluorescence sensor for carbon tetrachloride", Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); https://doi.org/10.1117/12.170673

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