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

• Main Authors: Yap, Wing Fen, Mat Yunus , Wan Mahmood, Yusof, Nor Azah
• Format: Article
• Language: English; English
• Published: Scientific Publishing Division Myu 2011
• Online Access: http://psasir.upm.edu.my/id/eprint/25003/1/Detection%20of%20mercury%20and%20copper%20ions%20using%20surface%20plasmon%20resonance%20optical%20sensor.pdf; http://psasir.upm.edu.my/id/eprint/25003/; http://www.myu-inc.jp/myukk/

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.