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Extraction Conditions for Rhododendron mucronulatum Pollen  

Park, Nan-Young (Keimyung Foodex Co. Ltd.)
Jeong, Yong-Jin (Department of Food Science and Technology, Keimyung University)
Woo, Sang-Chul (Department of Fire Safety Management, Daegu Health College)
Publication Information
Food Science and Preservation / v.14, no.1, 2007 , pp. 73-77 More about this Journal
Abstract
The physiochemical properties of Rhododendron mucronulatum pollens were examined after the use of various extraction conditions. The levels of phenolic compounds and electron donating abilities (DPPH) were better after 80% (v/v) ethanol extraction than after water extraction. The content of phenolic compounds and the DPPH were high when the solvent ratio was 20X. The content of phenolic compounds was highest at $45^{\circ}C$ (347.60 mg/100 g). The DPPH was highest, at 67.93%, when extraction was performed at $25^{\circ}C$. An extraction time of 6 hr yielded the highest content of phenolic compounds (312.63 mg/100 g). The DPPH did not vary with extraction time. Both the levels of phenolic compounds and DPPH values rose when extractions were performed twice. In summary, a solvent ratio of 20X, an extraction temperature of $25-45^{\circ}C$, double extraction and an extraction time of 6 hare optimal for extraction, with maximal DPPH and phenolic content, of Jindalrae pollens.
Keywords
Jindalrae pollen; total phenol; electron donating ability;
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Times Cited By KSCI : 5  (Citation Analysis)
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