Study of Cr^(6+) in Water by Surface Enhanced Raman Scattering

Cr_(6+)in K_(2)Cr_(2)O_(7),(NH_(4))_(2)Cr_(2)O_(7),and K_(2)CrO_(4) aqueous solution showed the same new strong band of 794cm^(-1) in surface enhanced Raman scattering(SERS)by using SERS silver substrates.This new feature could be assigned to a surface complex of silver and Cr^(6+),for instance Ag_(2)CrO_(4).The feature of 794cm^(-1) could be a fingerprint band for detecting pollutant Cr^(6+)in water from SERS by using the SERS active substrate of silver.