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Analysis of Aroma Pattern of Gastrodiae Rhizoma by the Drying Conditions  

Lee, Boo-Yong (Korea Food Research Institute)
Yang, Young-Min (Korea Food Research Institute)
Han, Chan-Kyu (Korea Food Research Institute)
Publication Information
Korean Journal of Food Science and Technology / v.34, no.1, 2002 , pp. 13-17 More about this Journal
Abstract
The study was to analyze aroma patterns of Gastrodiae Rhizoma by the electronic nose with conducing polymer 32 sensors. Response by the electronic nose was analyzed by the principal component analysis (PCA). Sensory evaluation for the organoleptic characteristics of Gastrodiae Rhizoma was also performed. Raw Gastrodiae Rhizoma was very intensive in overall odor and taste. Hot air-dried $60^{\circ}C$ Gastrodiae Rhizoma was relatively weak in overall odor and taste. Intensity of aroma in the electronic nose was the highest in $60^{\circ}C$ hot air-dried Gastrodiae Rhizoma. As quality factor (QF) calcuated from PCA map of normalized pattern data by thirty two sensors showed less than 2, and so aroma pattern among raw, freezed-dried, and hot-air dried Gastrodiae Rhizoma had no difference. When PCA was performed for normalized pattern data by the selected sensitive ten sensors, QF value between raw and $60^{\circ}C$ hot air-dried Gastrodiae Rhizoma was 2.366. Thus aroma pattern of raw and $60^{\circ}C$ hot air-dried Gastrodiae Rhizoma was discriminated in electronic nose.
Keywords
Gastrodiae Rhizoma; electronic nose; sensory evaluation; aroma pattern;
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