This project is based on a rapid Raman spectroscopy detection platform established by the previous project to achieve the following results. First, the optimal pH values of detecting hexavalent and trivalent chromium in water with surface-enhanced Raman scattering (SERS) were determined; with that, the procedure to quantify both chromium species in mixed solution was established. Second, the influences of different co-existing ions on the SERS detection of hexavalent chromium and cyanide in water were revealed; with that, the quantitative analysis of hexavalent chromium and cyanide with the SERS detection platform in actual effluent water samples from factories was performed. Third, the feasibility of using SERS technique to detect five organophosphorus and five amidoformate pesticides in water was evaluated; the standard spectral database of those pesticides that showed prominent SERS signal was established. Fourth, a portable Raman system was developed for on-site inspection of toxins.

Surface-enhanced Raman scattering, cyanide and hexavalent chromium