방향성 약초인 산국을 열풍건조기를 이용하여 각각 4O, 50, $60^{circ}C$ 에서 수분함량 $23{pm}1%$ 에 도달할 때까지 건조하였다. 건조시간은 8.5-69시간이 소요되었으며, 소요된 건조시간의 log값은 건조 온도와 높은 역 상관관계를 나타내었다. 건조온도 상승에 따라 산국의 색도 L 값과 b 값은 감소하였고, a 값은 증가하는 경향을 보였다. 산국의 휘발성분 함량의 총합을 $60^{circ}C$ 건조조건의 것을 100% 로 하였을 때 $50^{circ}C$ 건조에서는 98.4%, $40^{circ}C$ 건조에서는 85.4%로 건조 온도가 낮을수록 낮은 휘발성분이 검출되었다. 모든 건조조건의 산국에서 가장 많이 검출된 휘발성분은 germacrene D이었으며, 가장 높은 함량은 $60^{circ}C$ 건조에서 33.9%이었고, 같은 조건에서 camphor는 23.1%가 검출되었다.
This study examined the effect of drying temperature on the qualitative properties of Chrysanthemum boreale M. flowers. The flower samples were dried in a hot air dryer at $40^{circ}C$, $50^{circ}C$, and $60^{circ}C$, respectively, to attain a $23{pm}1%$ moisture content. The time required to reach the target moisture content was 8.5-69 hr, and there was a very high negative correlation between log (spending time) and temperature. The Hunter color L- and b-values of the flowers were decreased with increasing drying temperature, whereas the a-value was increased. The volatile compounds contained in the dried flowers were determined by a solid-phase microextraction method. Twelve primary volatile compounds were detected and then quantified based on the GC chromatograms of the samples. The total contents of volatile compounds were increased with increasing drying temperature, and germacrene D and camphor were the main compounds in all samples.
