This is an experimental study on separating type with the concentration of Alcohol with a GC (Gas Chromatography) and for caffeine concentration of samples by HPLC technique (High pressure liquid chromatography) so that people can understand and experimental knowledge to use. Alcohol type checking with a GC Retention time will bring the Retention time of Ethanol compared to standard section to find the concentration achieved by creating Standard curve of concentration versus area under a graph Slope and calculate the concentration of Ethanol, which is equal to 0.92 L/mol by technique, HPLC analysis found that caffeine pure and precious time that retention samples are equal, that is, there is caffeine in a sample mix exists then find standard concentration curve showed that concentrations are at mol/L 0.1016.
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