Development of a Handheld System for Liquor Authenticity Detection Based on Laser Spectroscopy Technique

Figure 1

The typical spectrum of liquor is produced by laser (405 nm) excitation, which includes a laser scattering peak, a Raman scattering peak of ethanol, a Raman scattering peak of water, and the fluorescence spectrum of the liquor. By analyzing various peaks of the spectrum, the substance content of liquor can be detected, achieving the goal of authenticity detection of liquor [17]. a.u., arbitrary units; nm, nanometer.