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Prevention of Epimerization and Quantitative Determination of Amygdalin in Armeniacae Semen with Schizandrae Fructus Solution  

Joo, Woo-Sang (Department of Oriental Pharmaceutical Sciences, Kyung Hee University)
Jeong, Ji-Seon (Department of Oriental Pharmaceutical Sciences, Kyung Hee University)
Kim, Hyo-Geun (Department of Oriental Pharmaceutical Sciences, Kyung Hee University)
Lee, Yong-Moon (College of Pharmacy, Chungbuk National University)
Lee, Je-Hyun (Department of Korean Medicine, Dongguk University)
Hong, Seon-Pyo (Department of Oriental Pharmaceutical Sciences, Kyung Hee University)
Publication Information
Archives of Pharmacal Research / v.29, no.12, 2006 , pp. 1096-1101 More about this Journal
Abstract
Armeniacae Semen not only contains amygdalin, but emulsin also, which is an enzyme that hydrolyzes amygdalin. The extraction yield of amygdalin from Armeniacae Semen was low, due to the presence of emulsin, when extracted with water. When Schizandrae Fructus solution was used as the extractant; however, amygdalin was almost completely extracted, regardless of the cutting size, due to the absence of the influence of emulsin. In addition, when the crude powder or small piece forms were used with Schizandrae Fructus solution, on epimerization of the D-amygdalin into neoamygdalin occurred. D-amygdalin and its conversion product, neoamygdalin, were quantitatively analyzed by reverse-phase, high-performance liquid chromatography (HPLC), with an optimized eluent of 10 mM sodium phosphate buffer (pH 2.3), containing 11.5% acetonitrile. The concentration and detector response were linearly correlated over the range 0.05 to 2 mM. The detection limits for both D-amygdalin and neoamygdalin were approximately $5\;{\mu}M$ for the amount injected.
Keywords
Armeniacae Semen powder; Schizandrae Fructus solution; D-Amygdalin; Neoamygdalin; Epimerization inhibition; Conversion ratio; Ma-whang-tang;
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