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Detection of mercury and copper ions using surface plasmon resonance optical sensor.


Citation

Yap, Wing Fen and Mat Yunus , Wan Mahmood and Yusof, Nor Azah (2011) Detection of mercury and copper ions using surface plasmon resonance optical sensor. Sensors and Materials, 23 (6). pp. 325-334. ISSN 0914-4935

Abstract

Mercury and copper ions, Hg2+ and Cu2+, can be detected by measuring surface plasmon resonance signals with a thin chitosan layer deposited on a gold film. An amount of 0.55 ml of chitosan cross-linked glutaraldehyde solution was spin coated onto a glass cover slip at 6000 rev./min for 30 s. Changes in the resonance angle (Δθ) are directly proportional to the concentration of heavy metal ions in solution (0.5–100 ppm). The sensitivities to Hg2+ and Cu2+ are 0.00743 and 0.00654 ppm−1, respectively. The gold/chitosan interface is highly sensitive to Hg2+ and Cu2+ with detection limits as low as 500 ppb.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Publisher: Scientific Publishing Division Myu
Keywords: Surface plasmon resonance; Mercury ion and copper ions Chitosan; Glutaraldehyde.
Depositing User: Nur Farahin Ramli
Date Deposited: 13 Aug 2013 02:31
Last Modified: 27 Oct 2015 04:54
URI: http://psasir.upm.edu.my/id/eprint/25003
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