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KMID : 1134820150440121923
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Journal of the Korean Society of Food Science and Nutrition
2015 Volume.44 No. 12 p.1923 ~ p.1926
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Optimum Extraction of Tricin and Tricin 4'-O-(threo-β-guaiacylglyceryl) Ether (TTGE) from Rice Hull (Oryza sativa L.)
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Yoon Na-ra
Lee Sang-Hoon
Jang Gwi-Yeong
Lee Yoon-Jeong
Li Meishan
Kim Min-Young
Lee Jun-Soo
Jeong Heon-Sang
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Abstract
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This study was conducted to evaluate the effects of extraction conditions on tricin and tricin 4'-O-(threo-β-guaiacylglyceryl) ether (TTGE) extracted from rice hull (Oryza sativa L.). Extraction conditions were an ethanol concentration of extraction solvent of 50～90%, extraction time of 0.5～48 h, and ultrasonic-assisted and agitated extraction as extraction methods. The total tricin and TTGE contents of rice hull were 82.20 μg/g and 53.12 μg/g, respectively. Recovery of tricin and TTGE increased to 76.11% and 71.42% with increasing ethanol concentration until 70% and then decreased above 80%, respectively. In ultrasonic-assisted extraction, highest recovery of tricin was 83.30% after 2 h of extraction and TTGE was 71.80% after 1 h of extraction. In agitated extraction, highest recovery of tricin was 92.34% after 48 h and TTGE was 76.89% after 24 h of extraction. Therefore, optimum extraction conditions for tricin and TTGE of rice hull were 70% ethanol concentration and ultrasonic-assisted extraction for 1 h.
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KEYWORD
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rice hull, tricin, tricin 4'-O-(threo-β-guaiacylglyceryl) ether, extraction condition
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