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膜分離純化制備中藥提取液膜分離制備中藥浸膏分離純化黃芪/丹參/潘紅花提取液分離純化靈芝/枸杞/魚腥草等膜分離過濾除雜黃連與金銀花膜分離技術在中藥制藥過程中的應用

中藥提取過程除雜在中藥提取過程中，采用膜分離技術除雜，可除去中藥中的一些大分子雜質，提高有效成分純度，增強藥物療效。

對黃連解毒湯模擬體系的超濾膜過程進行了研究，以了解黃連解毒湯復方中小分子藥效物質和共性高分子物質的超濾行為及相互影響，探討中藥水提液超濾過程污染機制; 結果表明，截留分子質量為 5kDa 的聚砜超濾膜對黃連解毒湯模擬溶液和復方溶液中藥效物質小檗堿和梔子苷的透過率在 90% 以上，淀粉、果膠、蛋白質三種高分子物質的截留率為 100% ，能滿足中藥提純、精制的要求。

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將膜分離技術用于金銀花綠原酸提取液的分離，先通過微濾膜 ( 聚偏氟乙烯膜) 截留去除綠原酸提取液中的不溶性固體顆粒及少量大分子物質，再用超濾膜 ( 聚砜膜) 截留去除蛋白質、多糖、鞣質及膠體物質等雜質，最后通過反滲透膜 ( 醋酸纖維素酯膜) 濃縮料液及除去少量小分子物質; 最終綠原酸收率可達67. 75% ，產品純度可達 13.21% ，該技術完全可用于大規(guī)模初步分離綠原酸。

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膜分離優(yōu)勢：

1、膜分離通常是常溫操作，特別適用于中藥中熱敏性物質的分離和濃縮;

2、分離效率高，能有效去除雜質，降低了有效成分損失;

3、工藝簡單，可分級分離，易于連續(xù)化和自動化操作，可有效縮短生產周期;

4、分離選擇性高，能有效去除細菌和熱源;

5、能有效回收溶劑，節(jié)約了資源，減少了環(huán)境污染;

6、選擇范圍廣，適用性強。

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