Detecting weak fluorescence turn-on in the presence of Pb2+ heavy metal ion using coaxial fiber optic sensor

Jianjun Ma; Yasser Chiniforooshan; Wenhui Hao; Wojtek J. Bock; Zhi Yuan Wang

doi:10.1117/12.2037100

11 October 2013 Detecting weak fluorescence turn-on in the presence of Pb²⁺ heavy metal ion using coaxial fiber optic sensor

Jianjun Ma, Yasser Chiniforooshan, Wenhui Hao, Wojtek J. Bock, Zhi Yuan Wang

Author Affiliations +

Proceedings Volume 8915, Photonics North 2013; 89151I (2013) https://doi.org/10.1117/12.2037100
Event: Photonics North 2013, 2013, Ottawa, Canada

Abstract

This paper is devoted to examining the ability of a coaxial fiber-optic sensor (FOS) in detecting weak fluorescent light and weak fluorescence “turn-on” in the presence of trace heavy metal ion Pb²⁺. The captured fluorescent signal is detected by the Ocean Optics QE65000 spectrometer. The stock solutions include Pb²⁺ acetate in water (0.01 M) and a small molecule probe in water. The preliminary experiment shows that this FOS offers the Pb²⁺ detection limit (DL) of 1.26×10^-4 mg/mL. The advantages, limitations and further improvements of this coaxial FOS are discussed in comparison with the bench-top instruments in terms of the abilities of signal light capture and stray excitation light suppression.

Citation Download Citation

Jianjun Ma, Yasser Chiniforooshan, Wenhui Hao, Wojtek J. Bock, and Zhi Yuan Wang "Detecting weak fluorescence turn-on in the presence of Pb²⁺ heavy metal ion using coaxial fiber optic sensor", Proc. SPIE 8915, Photonics North 2013, 89151I (11 October 2013); https://doi.org/10.1117/12.2037100

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