(Color online) Schematic of the external standard attachment.
External standard attachment with parts list and lens numbers.
(a) Sapphire window spectrum; (b) sapphire window and ethanol spectrum at a concentration of 100% ; (c) ethanol at a concentration of 100% after sapphire subtraction; (d) ethanol at a concentration of 26% after sapphire subtraction.
Sapphire normalized peak area of the Raman band of ethanol vs the ethanol concentration. The solid line is a best fit to the data points for the standard ethanol solutions. The cross points represent measurements performed on commercial alcoholic solutions plotted against the labeled alcohol concentration.
(a) Sapphire window spectrum; (b) sapphire window and benzene; (c) benzene spectrum after sapphire subtraction.
Comparison of literature and measured Raman cross sections for various liquids.
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