중국산 건생강으로부터 올레오레진을 추출하고자 극초단파를 이용하여 몇 가지 기초실험을 실시하였다. 극초단파(2,450 MHz, 50 W) 추출에서 원료의 입자크기는 60 mesh 내외, 시료와 용매의 비는 1:10 (g/mL) 범위가 적당한 것으로 나타났다. 에탄올 가용성 고형분은 에탄올농도가 낮을수록 증가하였으나 추출물의 전자공여능은 에탄올 25%에서 가장 높게 나타났고, 추출물의 총페놀 함량은 에탄올 농도 50% 이상에서 급속히 증가되었다. 건

Some fundamental conditions were investigated in microwave-assited extraction (MAE) for oleoresin from Chinese dried ginger. The fifty watts of microwave energy(2,450 MHz), 60 mesh in particle size and 1:10 (g/mL) ratio of sample to solvent were the optimum conditions. Lower yield of soluble oleoresins was obtained at higher concentrations of ethanol. Radical scavenging ability was highest in extracts by using 25% of ethanol. Total phenolics in extracts were remarkably increased at above 50% of ethanol concentration. Overall yield of oleoresin components increased in proportional to extraction time up to 7 min. Based on the above results, it is indicated that ethanol concentration is a critical parameter in MAE.

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