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

Erica S 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

Environ Sci Technol. 2005 Mar 1;39(5):1257-62. doi: 10.1021/es049234z.

Authors

Erica S Forzani¹, Haiqian Zhang, Wilfred Chen, Nongjian Tao

Affiliation

¹ Department of Electrical Engineering & The Center for Solid State Electronics Research, Arizona State University, Tempe, Arizona 85287, USA.

PMID: 15787364
DOI: 10.1021/es049234z

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.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Environmental Monitoring / methods*
Ions / analysis
Metals, Heavy / analysis*
Sensitivity and Specificity
Surface Plasmon Resonance*
Water Pollutants / analysis*

Substances

Ions
Metals, Heavy
Water Pollutants