Detection of low-concentration heavy metal ions using optical microfiber sensor

Heavy metal pollution in natural water environment is always a concern in both human and ecosystem health. All current systems available in the market for detecting heavy metal ions have common drawbacks such as bulky size, expensive set-up and costly maintenance. This paper presents an optical micr...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2016-12, Vol.237, p.142-149
Main Authors: Ji, Wen Bin, Yap, Stephanie Hui Kit, Panwar, Nishtha, Zhang, Li Ling, Lin, Bo, Yong, Ken Tye, Tjin, Swee Chuan, Ng, Wun Jern, Majid, Maszenan Bin Abdul
Format: Article
Language:English
Subjects:
Actuators
Chelating
Chelating agent
Heavy metal ion
Heavy metals
Interferometric sensor
Maintenance
Microfiber
Microfibers
Non-adiabatic taper
Optical fiber sensor
Pollution abatement
Sensors
Spectra
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Summary:Heavy metal pollution in natural water environment is always a concern in both human and ecosystem health. All current systems available in the market for detecting heavy metal ions have common drawbacks such as bulky size, expensive set-up and costly maintenance. This paper presents an optical microfiber sensor functionalized with chelating agent to detect the existence of specific heavy metal ions of low concentration. To the best of our knowledge, coating of chelating agent on silica microfiber of very small diameter (3.9μm) is the first such report. A clear spectral shift was observed when the sensor was immersed into metal ion solution of concentration 10ppb.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2016.06.053