STUDY ON DRYING PROCESS OF CHINESE YAM

Liu Xiao, Luo Shiyong, Xu Wencai, Liu Shoujie, Zhang Yuyao, Huang Wei, Ma size

ABSTRACT: In this study, the drying process of iron yam (produced in Henan Province, Thick skin) was studied by hot-air, vacuum, hot-air and vacuum combined drying method respectively. According to the appearance color, rehydration rate and drying rate of the dried yam pills, the study obtained the drying conditions of iron yam: drying the fresh yam pill at 60℃until the surface is dried and then dried in a vacuum oven at 45℃until the moisture content of the yam reaches the requirements of the Pharmacopoeia. This process under the conditions of dry iron yam pills have a good color and storage effect.

Keywords: Iron yam pills, Drying process, appearance color