Detection of heavy metal ions in drinking water using a high-resolution differential surface plasmon resonance sensor

Erica Forzani; Haiqian Zhang; Wilfred Chen; Nongjian Tao

doi:10.1021/es049234z

Detection of heavy metal ions in drinking water using a high-resolution differential surface plasmon resonance sensor

Erica Forzani, Haiqian Zhang, Wilfred Chen, Nongjian Tao

Research output: Contribution to journal › Article › peer-review

221 Scopus citations

Abstract

We have built a high-resolution differential surface plasmon resonance (SPR) sensor for heavy metal ion detection. The sensor surface is divided into a reference and sensing areas, and the difference in the SPR angles from the two areas is detected with a quadrant cell photodetector as a differential signal. In the presence of metal ions, the differential signal changes due to specific binding of the metal ions onto the sensing area coated with properly selected peptides, which provides an accurate real-time measurement and quantification of the metal ions. Selective detection of Cu²⁺ and Ni²⁺ in the ppt-ppb range was achieved by coating the sensing surface with peptides NH₂-Gly-Gly-His-COOH and NH₂-(His)₆-COOH. Cu²⁺ in drinking water was tested using this sensor.

Original language	English (US)
Pages (from-to)	1257-1262
Number of pages	6
Journal	Environmental Science and Technology
Volume	39
Issue number	5
DOIs	https://doi.org/10.1021/es049234z
State	Published - Mar 1 2005

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry

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title = "Detection of heavy metal ions in drinking water using a high-resolution differential surface plasmon resonance sensor",

abstract = "We have built a high-resolution differential surface plasmon resonance (SPR) sensor for heavy metal ion detection. The sensor surface is divided into a reference and sensing areas, and the difference in the SPR angles from the two areas is detected with a quadrant cell photodetector as a differential signal. In the presence of metal ions, the differential signal changes due to specific binding of the metal ions onto the sensing area coated with properly selected peptides, which provides an accurate real-time measurement and quantification of the metal ions. Selective detection of Cu2+ and Ni2+ in the ppt-ppb range was achieved by coating the sensing surface with peptides NH2-Gly-Gly-His-COOH and NH2-(His)6-COOH. Cu2+ in drinking water was tested using this sensor.",

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AU - Forzani, Erica

AU - Zhang, Haiqian

AU - Chen, Wilfred

AU - Tao, Nongjian

PY - 2005/3/1

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AB - We have built a high-resolution differential surface plasmon resonance (SPR) sensor for heavy metal ion detection. The sensor surface is divided into a reference and sensing areas, and the difference in the SPR angles from the two areas is detected with a quadrant cell photodetector as a differential signal. In the presence of metal ions, the differential signal changes due to specific binding of the metal ions onto the sensing area coated with properly selected peptides, which provides an accurate real-time measurement and quantification of the metal ions. Selective detection of Cu2+ and Ni2+ in the ppt-ppb range was achieved by coating the sensing surface with peptides NH2-Gly-Gly-His-COOH and NH2-(His)6-COOH. Cu2+ in drinking water was tested using this sensor.

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Detection of heavy metal ions in drinking water using a high-resolution differential surface plasmon resonance sensor

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