Using the unique spectral characteristics of its proprietary fractal-microcavity composite, LaSys, Inc., will perform the proof-of-concept research required to develop an ultra-sensitive optical detector of low concentration of arsenic in water based on the Raman effect. The Phase I technical objectives are designed to demonstrate that fractal microcavity composite-surface-enhanced Raman scattering spectroscopy is capable of detecting quantitatively arsenic in water at levels that are useful for determining compliance with the upcoming U.S. Environmental Protection Agency maximum contaminant level (MCL) of 10 µg/L. The goal at the end of Phase III is to develop a hand-held, easy-to-use instrument for the field detection of arsenic at or below the January 2006 MCL. This ultra sensitive instrument will provide accurate, precise, and quantitative measurement of arsenic in the 1-200 ppb range in real time via a visual digital readout. This commercial, field-portable device of robust construction will be battery powered and weigh approximately 1 pound and be simple to use in the hands of nontechnical individuals. It will provide significant advantages over currently available colorimetric test kits and chemical sensors and be competitively priced. Supplemental
Keywords: small business, SBIR, arsenic, drinking water, water quality, fractal microcavity composite, Raman device, surface-enhanced Raman scattering spectroscopy, maximum contaminant level, arsenic detection, public health, EPA
