Effects of Drying Temperature on the Saponin and Free Sugar Contents of Platycodon grandiflorum Radix
2014
Lee, B.J., Gyeongnam National University of Science and Technology, Jinju, Republic of Korea | Cho, Y.S., Gyeongnam National University of Science and Technology, Jinju, Republic of Korea
This study was conducted to provide basic information on the effects of drying temperatures (45, 65, and 85¡�) on saponins and free sugar contents of a 5-year-old Platycodon grandiflorum Radix. Platycodin D levels decreased with increase in drying temperature (956, 334, and 197 mg% at 45, 65, and 85¡�, respectively). Polygalacin D levels were the highest at 45oC (577 mg%), while platycodin D3 and deapioplatycodin D were high at 65¡� (304 and 272 mg%, respectively). Sucrose levels were 3,825 mg% at 85¡� and 1,226 mg% at 45¡�, and decreased when the drying temperature was decreased. The sucrose content showed significant negative correlation with saponin levels in dried P. grandiflorum (?0.987**, p0.01). These results suggested that drying P. grandiflorum at low temperatures is more economically viable.
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