B. Gu, J. Tio, Wei Wang
Jun 1, 2004
Citations
2
Influential Citations
51
Citations
Journal
Applied Spectroscopy
Abstract
Perchlorate (ClO4−) has recently emerged as a widespread environmental contaminant found in groundwater and surface water, and there is a great need for rapid detection and monitoring of this contaminant. In this study, we explore the use of surface-enhanced (SERS) and normal Raman spectroscopy for detecting ClO4− at low concentrations. We found that ClO4− is SERS active and, for the first time, were able to detect ClO4− at concentrations as low as 10−6–10−7 M (or 10–100 μg/L) through the application of silver SERS substrates or selective sorbents such as bifunctional anion-exchange resins. The use of selective sorbents greatly enhanced the reproducibility and sensitivity of ClO4− detection by normal Raman spectroscopy. Further exploration and research may allow application of these techniques for in situ, real-time detection and monitoring of ClO4− in environmental samples at even lower concentrations.