THE ISOLATION AND IDENTIFICATION OF DYES IN AQUEOUS-MEDIA BY SOLID-PHASE EXTRACTION-FOURIER TRANSFORM-RAMAN SPECTROSCOPY (SPERS)

The isolation of photographic dyes in aqueous solution by solid phase extraction (SPE) and identification by FT-Raman spectroscopy is report ed. A series of dyes was studied using anion exchange (quaternary amin e) and aminopropyl SPE cartridges and disks, Dye identification was po ssible by comparison of Raman spectra recorded from the SPE cartridges and disks, with a spectral library generated from the corporate refer ence materials. The determination of an unknown dye in an aqueous effl uent stream is described as an application of the technique.