Surface-Enhanced Raman Spectroscopy for Trace Arsenic Detection in Contaminated Water


  • The authors would like to thank David Okawa and Prof. Alex Zettl for granting use of their multiple wavelength Renishaw MicroRaman instrument. We would like to thank Allan Smith for helpful discussions and Craig Steinmaus for providing the well-water samples and AFS data. Additionally, we would like to acknowledge the NIEHS Superfund Basic Research Program and the U.S. Department of Energy under Contract No. DE-AC02-05CH11231 for funding.


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Getting to the bottom of groundwater: The development of a reliable, portable, and simple-to-use device for detecting arsenic in groundwater is urgently needed in developing nations such as Bangladesh, where contaminated groundwater is at the root of a public health crisis. Toward this end, a highly sensitive platform utilizing surface-enhanced Raman spectroscopy (SERS, see picture) is used to quantitatively detect arsenate in water down to 1 ppb.