水提取和半仿生提取盒果藤中7种微量元素的形态分析比较

摘要

目的:研究水提取和半仿生提取后盒果藤中与抗白癜风有关的元素提取率及存在形态.方法:分别采用水提法和半仿生提取法.用微孔滤膜分离盒果藤提取液中的可溶态与悬浮态元素;大孔树脂分离可溶态中有机态和无机态微量元素;火焰原子吸收光谱法测定盒果藤中铜、锌、铁、钙、镁、锰、锶7种元素的含量并进行形态分析.结果:水提后,盒果藤中7种微量元素的提取率为40.47%~72.49%;悬浮颗粒比例为3.69%~8.78%;锶元素可溶态中有机态/无机态比例为104.36%,铜、锌、铁、钙、镁、锰可溶态中有机态/无机态比例为3.94%~48.39%.半仿生提取后,除锰元素外,盒果藤中微量元素提取率均高于水提法,铜、锌、铁、钙、镁、锶的提取率为77.69%~90.19%;各元素悬浮颗粒比例为0.39%~8.57%;可溶态中有机态/无机态比例为72.74%~180.79%.结论:盒果藤中铜、锌、铁、钙、镁、锰、锶等元素较易溶出,且溶出后主要以无机态形式存在.半仿生提取后,除锰元素外,其他元素溶出率均显著上升,且溶出后微量元素的有机态比例显著提高,微量元素的溶出和有效利用率均高于水提法.%OBJECTIVE:To study the extraction rate and speciation of antivitiligo-related elements in Opercalina turperthum by water extraction and semi-bionic extraction. METHODS:Water extraction and semi-bionic extraction were respectively used. Wa-ter-soluble state and suspension state in extract of O. turperthum were separated by microporous filtering film;organic and inorgan-ic trace elements in water-soluble state were separated by macroporous resin. The contents of Cu,Zn,Fe,Ca,Mg,Mn and Sr were detected by flame atomic adsorption spectrophotometry,and speciation analysis was conducted. RESULTS:After water extrac-tion,extraction rates of 7 trace elements were 40.47%-72.49%;ratio of suspended particles was 3.69%-8.78%;ratio of organic state/inorganic state was 104.36% in water-soluble state of Sr and 3.94%-48.39% in water-soluble state of Cu,Zn,Fe,Ca,Mg, Mn. After semi-bionic extraction,except for Mn,extraction rates of trace elements were higher than water extraction,extraction rates of Cu,Zn,Fe,Ca,Mg,Sr were 77.69%-90.19%;ratio of suspended particles was 0.39%-8.57%;the ratio of organic state/inorganic state was 72.74%-180.79% in water-soluble state of elements. CONCLUSIONS:Cu,Zn,Fe,Ca,Mg,Mn and Sr in O. turperthum are dissolved easily,mainly existing in the form of inorganic state. After semi-bionic extraction,except for Mn,the dis-solution rate of other elements and the proportion of organic trace elements after dissolution increase significantly. Both dissolution and effective utilization rate of trace elements by semi-bionic extraction are higher than water extraction.