Ozone treatment was applied to ginseng powder for the improving hygienic quality of ginseng powder. A bacterial strain was isolated form ginseng powder contaminated. The strain designated as GT4, was identified as Escherichia coli species by IMVIC test method. Ozone inhibited strongly total bacteria and coliforms in ginseng powder(initial concentration 10³/g) at 0.35 ppm. High ozone concentration reduced death time of the total bacteria in ginseng powder. However, ozone treatment caused significant degradation in saponins of ginseng powder. Ozone treatment also caused a increase in Hunter's color L value and decrease in a and b values of ginseng powder.

• 곽이성(한국인삼연초연구원) | Yi Seong Kwak
• 노길봉(한국인삼연초연구원) | Kil Bong, No
• 장진규(한국인삼연초연구원) | Jin Kyu Chang
• 최강주(한국인삼연초연구원) | Kang Ju Choi