Raman spectroscopic detection for perchlorate at low concentrations

被引:49
作者
Gu, BH
Tio, J
Wang, W
Ku, YK
Dai, S
机构
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[2] MIT, Cambridge, MA 02139 USA
关键词
Raman spectroscopy; perchlorate; surface-enhanced Raman scattering; SERS; silver; anion-exchange resin;
D O I
10.1366/000370204872890
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
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 mug/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.
引用
收藏
页码:741 / 744
页数:4
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