Rapid Test of Alcoholicity in Alcoholic Beverages by Near Infrared Spectroscopy
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Abstract:
The rapid determination of alcoholicity content in alcoholic beverages by near infrared spectroscopy (NIR) method was studied. The alcoholicity of 100 wine samples was detected by NIR and digital density meter method and the linear measuring range of NIR method was determined. Furthermore, the accuracy of the alcoholicity in other types of alcoholic beverages, such as fermented alcoholic beverages (fruit wine, sake and Chinese rice wine) and distilled spirits (vodka, whisky, brandy, rum and Chinese spirits ) were also investigated by using NIR . The results showed that the actual digital display measuring range was 0~28%vol，and the linear range was 0~20% vol. The alcoholicity in wine samples measured by two different methods showed a good correlation and there was no significant difference through t test (t0.05,4=2.78) and F test (F0.05(2,2)=19.0) at the level of α = 0.05. The alcoholicity in other types of alcoholic beverages determined by the two methods was consistent in evaluation of conformity. NIR method verified in this study is easy and fast to operate and has good repeatability. It is appropriate for determining alcoholicity in wine samples, and other kinds of alcoholic beverages.
