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http://dx.doi.org/10.5307/JBE.2004.29.4.323

Measurement of Alcohol Contents in Alcoholic Beverages Using a Surface Plasmon Resonance Sensor  

조용진 (Korea Food Research Institute, Songnam)
안병학 (Korea Food Research Institute, Songna)
김철진 (Korea Food Research Institute, Songna)
김종태 (Korea Food Research Institute, Songnam)
Publication Information
Journal of Biosystems Engineering / v.29, no.4, 2004 , pp. 323-328 More about this Journal
Abstract
A surface plasmon resonance (SPR) sensing system, which belonged to a family of thin film refractometry-based sensors, was fabricated to measure the alcohol contents in alcoholic beverages. In this study, a SPR owe was obtained by a photodiode array with 128 pixels and transformed into a refractive index which was calculated by means of the first moment of values below a baseline of 0.85. When the sensing system was applied to Soju, Cheonju, Igwaduju and Tacju highly linear relationships between the refractive index by SPR and the contents of alcohol were obtained. That is, the coefficients of determination in their linear models were 0.992, 0.933, 0.918 and 0.954, respectively. Meanwhile, the effect of sample preparations on the accuracy of measurement was analyzed. As for Soju and Tacju, the best calibration equations were obtained when no sample preparation was applied. The best calibration models for measurement of Cheonju and Igwaduju were obtained through the samples filtered by $C_{18}$ disks.
Keywords
Surface plasmon resonance; Measurement of alcohol content; Alcoholic beverage; Sample preparation effect.;
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