Accession Number:

ADA531926

Title:

Perchlorate Detection at Nanomolar Concentrations by Surface-Enhanced Raman Scattering

Descriptive Note:

Journal article

Corporate Author:

OAK RIDGE NATIONAL LAB TN ENVIRONMENTAL SCIENCES DIV

Personal Author(s):

• Gu, Baohua
• Ruan, Chuanmin
• Wang, Wei

Report Date:

2009-01-01

Pagination or Media Count:

6.0

Abstract:

Perchlorate ClO4 has emerged as a widespread environmental contaminant and has 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 lgL by using 2-dimethylaminoethanethiol DMAE modified gold nanoparticles as a SERS substrate. Quantitative analysis of ClO4 was validated with good eproducibility by using both simulated and contaminated groundwater samples. When coupled with a portable Raman spectrometer, this technique has the potential to be used as an in situ, rapid screening tool for perchlorate in the environment.

Descriptors:

• *PERCHLORATES
• *RAMAN SCATTERING
• *CONTAMINANTS
• *FOOD
• RAMAN SPECTROSCOPY
• GROUND WATER
• CONTAMINATION
• URINE
• MAMMARY GLANDS
• TOOLS
• DETECTION
• ENVIRONMENTS
• PORTABLE EQUIPMENT
• SURFACE WATERS

Subject Categories:

• Food, Food Service and Nutrition
• Inorganic Chemistry
• Atomic and Molecular Physics and Spectroscopy
• Environmental Health and Safety

Distribution Statement:

APPROVED FOR PUBLIC RELEASE