Effect of Drying Methods on the Saponin and Mineral Contents of Platycodon grandiflorum Radix

도라지 뿌리의 건조방법에 따른 무기 성분 및 사포닌 함량의 변화

Lee, Byung-Jin;Jeon, Seung-Ho;Lee, Shin-Woo;Chun, Hyun-Sik;Cho, Young-Son

  • Received : 2014.05.16
  • Accepted : 2014.08.05
  • Published : 2014.10.31


This study was conducted to provide basic information about the drying methods (daylight, hot-air, and freeze drying) used for Platycodon grandiflorum radix. We investigated the mineral, free sugar, and saponin contents of dried P. grandiflorum. The potassium and calcium contents of hot-air-dried samples were the highest (22.6 and 9.2 mg%, respectively), when compared to those of daylight- or freeze-dried samples. Glucose and sucrose contents were the highest in freeze-dried samples (1,552 and 145.0 mg%, respectively), while fructose content was the highest in hot-air-dried samples (611.9 mg%). Platycodin D content was the highest in hot-air-dried samples (622.0 mg%); however platycodin D3, polygalacin D, and deapioplatycodin D contents were the highest in daylight-dried plant (113.5, 756.6, and 109.2 mg%, respectively). Glucose content was highly negatively correlated (p<0.01) with platycodin D, platycodin D3, and deapioplatycodin D (-0.924, -0.957, -0.861, p<0.01, respectively). These results suggest that the drying method affects the saponin content of P. grandiflorum and daylight and hot-air drying methods are more suitable and beneficial than freeze-drying.


drying methods;free sugar;Platycodon grandiflorum;saponin


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