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KMID : 0903520040470030300
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2004 Volume.47 No. 3 p.300 ~ p.306
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Discriminant Analysis of Marketed Beverages Using Multi-channel Taste Evaluation System
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Park Kyung-Rim
Park In-Seon
Bae Young-Min
Cho Yong-Jin
Kim Nam-Soo
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Abstract
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Eight cation or anion-responsive polymer membranes were prepared by a casting procedure employing polyvinyl chloride, Bis (2-ethylhexyl)sebacate and each electroactive material in the ratio of 66 : 33 : 1. The resulting membranes were separately installed onto the sensitive area of the ionic electrodes to produce an 8-channel taste sensor array. The taste sensors of the array were connected to a high-input impedance amplifier and the amplified sensor signals were interfaced to a PC via an A/D converter. The taste evaluation system was applied to a discriminant analysis on six groups of marketed beverages like sikhye, sujunggwa, tangerine juice, ume juice, ionic drink and green tea. When the signal data from the sensor array were analyzed by principal component analysis after normalization, the 1st, 2nd and 3rd principal component explained most of the total data variance. The six groups of the analyzed beverages were discriminated well in the three dimensional principal component space. The half of the five groups of the analyzed beverages was also discriminated in the two dimensional principal component plane.
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KEYWORD
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polymer membranes, taste evaluation system, marketed beverages, principal component analysis
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