The sample problem has inhibited widespread use of Raman spectroscopy. The main aspects of the sample problem are turbidity, color, and fluorescence. Turbid samples may be successfully run by suitable filtering of exciting light and by using a sharp bandstop filter to remove exciting light from the Raman spectrum. Theoretical analysis shows that a Toronto arc source combined with a conical sample tube will give the highest yield of Raman radiation. The efficiencies of alternative sample shapes and optical designs, including beam-splitting arrangements, may readily be calculated by use of general principles.
Raman Spectrum Raman Spectroscopy Raman Line Sample Problem Exciting Light
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