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KMID : 1134820140430111749
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Journal of the Korean Society of Food Science and Nutrition
2014 Volume.43 No. 11 p.1749 ~ p.1756
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Optimization of Extraction Conditions for Useful Components from Sweet Potato Leaves
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Li Meishan
Jang Gwi-Yeong
Lee Sang-Hoon
Kim Sung-Tae
Lee Ji-Hyun
Hwang Se-Gu
Sin Hyun-Man
Kim Hong-Sig
Kang Tae-Soo
Jeong Heon-Sang
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Abstract
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This study was performed to establish extraction conditions for useful components from sweet potato leaves. Extraction conditions were heating temperature (40∼60°C), ratio of solvent to sample (10∼30 mL/g), and ethanol concentrations (50∼90%). The maximum lutein content was 381.88 μg/g under the following conditions: 81.23% ethanol concentration, 46.75°C temperature, and 25.78 mL/g ratio of solvent. The maximum total polyphenol content was 58.44 mg GAE/g under 67.0%, 53.90°C, and 29.10 mL/g, whereas maximum total chlorophyll content was 769.14 mg/100 g under 93.10%, 69.90°C, and 25.98 mL/g, respectively. The highest antioxidant activity of electron-donating ability (IC50) was 0.582 mg/mL under 64.56%, 54.63°C, and 19.57 mL/g, whereas total antioxidant activity was 32.54 mg AA eq/g under 64.42%, 44.51°C, and 26.01 mL/g, respectively. Under these conditions, experimental data matched well with the predicted data. Consequently, the present study was carried out to simulate and optimize sweet potato leaves for useful component extraction.
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KEYWORD
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sweet potato leaves, optimization, lutein, polyphenol, antioxidant activity
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