Raman Spectrum Studies on Flash Point of Binary Liquid Mixture

In order to explore the quantitative relationships between the flash points and Raman spectrum,ethanol and acetontrile as research object with known concentrations in liquid mixture were analyzed by laser Raman spectrometer for their Raman characteristic peaks and Raman shift.The result indicated that the Raman intensity of object linearly increased with the concentration increasing in liquid mixture,but the flash points decreased.The Raman intensities and cubic polynomial equation have been used and applied for the analysis of liquid samples exactly.The relationship between flash point and Raman intensity is equal to that between flash point and concentrations.The variation of the flash points can be explained from the structure of the molecular with Raman spectrum and this method can also be used in the on-line analysis of the flash points of liquid mixture.