pp. 325-334
S&M849 Research Paper https://doi.org/10.18494/SAM.2011.723 Published: August 26, 2011 Detection of Mercury and Copper Ions Using Surface Plasmon Resonance Optical Sensor [PDF] Yap Wing Fen, Wan Mahmood Mat Yunus and Nor Azah Yusof (Received August 23, 2010; Accepted November 25, 2010) Keywords: surface plasmon resonance, mercury and copper ions, chitosan, glutaraldehyde
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 (∆θ) 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.
Corresponding author: Yap Wing FenCite this article Yap Wing Fen, Wan Mahmood Mat Yunus and Nor Azah Yusof, Detection of Mercury and Copper Ions Using Surface Plasmon Resonance Optical Sensor, Sens. Mater., Vol. 23, No. 6, 2011, p. 325-334. |