Sample illumination configurations for spatially resolved Raman spectrometry using a charge-coupled device detector.
In this paper two simple configurations for sample illumination using a charge-coupled device (CCD) detector have been shown. The choice of an appropriate sample illumination can be crucial to obtain spatial and spectral information of complex samples. It is demonstrated that simultaneous Raman spectra of a heterogeneous sample of three compounds can be obtained using a vertical sample illumination. Spatially resolved resonant Raman and surface-enhanced resonant Raman spectra of a complex (Ni-PAPH) have been observed with a low integration time. Dividing the CCD in two region; and with horizontal multiline sample illumination (argon-ion laser at 488 nm and HeNe laser at 632.8 nm) spatially resolved fluorescence spectra of a homogeneous mixture of dyes have been obtained. The total image was acquired in only 1 s.
Cabalín
L M
LM
Department of Analytical Chemistry, Faculty of Sciences, University of Málaga, E-29071 Málaga, Spain.
Laserna
J J
JJ