Volatile Discrimination of Irradiated and Fumigated White Ginseng Powders at Different Storage Times and Temperatures Using the Electronic Nose

摘要

The pattern of volatile emissions from white ginseng powders (WGP) that were treated with selected preservatives was investigated during 5-months of storage (at -10 and 25°C) by an electronic nose system equipped with 12 metal-oxide sensors. WGP weretreated with gamma radiation at 5 kGy, commercial methyl bromide (MeBr), and phosphine fumigations. Electronic nose differentiated the volatile patterns of the WGP with each different preservative treatment. In addition, each volatile pattern was affected by both storage time (1, 2 and 5 months) and temperature (-10 and 25°C). After 5-months of storage, the least change of volatile patterns was observed from WGP fumigated with phosphine at -10°C. The result also showed that volatile changes in WGP were much more affected by storage time than by storage temperature.