F2水液丙酮沉淀纯化后，上c 18反相柱反复纯化。
F2 water purification liquid acetone precipitation, the RP-C18 column repeated purification.
纯化阶段，硅胶柱色谱及制备型薄层色谱处理提取物，正己烷沉淀结晶。
In purifying phase, the extracts were disposed by silica gel column chromatography and preparation lamella chromatography, then crystaled by N-Hexane.
以上几种降氟剂根据水质不同可单独使用，也可钙、镁两种降氟剂混合使用。使用方法有煮沸法，接触沉淀法、滤柱过滤法来处理高氟水，其水氟含量可达到正常饮用标准。
High fluorine water can be treated by boiling method, contact precipitation method or column filter method, the content of fluorine for processed water can meet normal drinking standard.
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