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KMID : 0380620140460050636
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Korean Journal of Food Science and Technology
2014 Volume.46 No. 5 p.636 ~ p.640
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Effect of Drying Methods on the Saponin and Mineral Contents of Platycodon grandiflorum Radix
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Lee Byung-Jin
Jeon Seung-Ho
Lee Shin-Woo
Chun Hyun-Sik
Cho Young-Son
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Abstract
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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.
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KEYWORD
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drying methods, free sugar, Platycodon grandiflorum, saponin
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