Effect of Hot-air Drying Temperature on Volatile Compounds in Chrysanthemum borole M. Flowers

摘要

This study examined the effect of drying temperature on the qualitative properties of Chrysanthemum bor閍le M. flowers The flower samples were dried in a hot air dryer at 40 deg C, 50 deg C, and 60 deg C, respectively, to attain a 23+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 lvalues 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 chromatogramsof 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.