• Title/Summary/Keyword: Jindalrae pollen

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Extraction Conditions for Rhododendron mucronulatum Pollen (추출조건에 따른 진달래 화분의 이화학적 특성)

  • Park, Nan-Young;Jeong, Yong-Jin;Woo, Sang-Chul
    • Food Science and Preservation
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    • v.14 no.1
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    • pp.73-77
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    • 2007
  • 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.