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【多选题】
除去鞣质的方法有( )A.
加热后冷藏法
B.
加石灰、铅盐或明胶等沉淀鞣质
C.
在鞣质乙醇溶液中加氢氧化钠至pH9～10，鞣质成钠盐析出
D.
用明胶或铅盐使其沉淀
E.
聚酰胺吸附法
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