Aroma Analysis by the Electronic Nose on Red Ginseng Powder Treated with Gamma Radiation, Methyl Bromide and Phosphine

An electronic nose was applied to analyze the aroma patterns of powdered red ginseng that had been treated with different preservative methods, such as gamma radiation at 5kGy, commercial methyl bromide (MeBr) and phosphine fumigations. Aroma patterns of phosphine or MeBr, fumigated samples were well separated according to storage temperature and period. However, 5kGy-irradiated samples (stored for 1 and 2 months) were hardly discriminated by the different storage temperatures ( and ). After 5 months at , non-treated and phosphine fumigated samples showed similar aroma patterns.