Simple and easy method to identify artificial colors or natural pigment in red wine

Objective:The paper was to identify the artificial colors synthesized from chemicals or natural pigment extracted from red grape skin in red wine. Method:Comparing and characterization the color on test paper about red wine sample were researched. Results:If the color on test paper was red,there were artificial colors in red wine sample. If the color on test paper was blue after 5 minutes in the air at room temperature,there were natural pigment in red wine sample. If the color on test paper was blue at first but that was gradually getting yellow with 5 minutes in the air at room temperature,there were no natural pigment extracted in red wine sample. conclusions:This method was simple and fast,suitable for identifing whether artificial colors or natural pigment was doped in wine.