Perchlorate Detection at Nanomolar Concentrations by Surface-Enhanced Raman Scattering
- ORNL
Perchlorate (ClO4) has emerged as a widespread environmental contaminant and been detected in various food products and even in human breast milk and urine. This research developed a sensing technique based on surface-enhanced Raman scattering (SERS) for rapid screening and monitoring of this contaminant in groundwater and surface water. The technique was found to be capable of detecting ClO4 at concentrations as low as 10-9 M (or ~0.1 g/L) by using 2-dimethylaminoethanethiol (DMAE) modified gold nanoparticles as a SERS substrate. Quantitative analysis of ClO4 was validated with good reproducibility by using both simulated and contaminated groundwater samples. When coupled with a portable Raman spectrometer, this technique thus has the potential to be used as a in situ, rapid screening tool for perchlorate in the environment.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- Work for Others (WFO); USDOE Laboratory Directed Research and Development (LDRD) Program
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 964320
- Journal Information:
- Applied Spectroscopy, Vol. 63, Issue 1; ISSN 0003-7028
- Country of Publication:
- United States
- Language:
- English
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