After column chromatographic separation, re-crystallization treatment and supercritical fluid precipitation treatment, the purity of lutein is improved.
粗提物经柱层析分离，重结晶，再经过超临界流体沉淀处理后，可提高叶黄素的纯度。
The distribution of typhoon precipitation presents the positive ad negative change as the gravity wave column wise under the influence of terrain.
台风降水受地形影响呈现出类重力波列式的正负相间的变化分布。
Settling column of fluidized bed and its applications in precipitation of high quality coarse diuranate are described.
介绍了流化床沉淀塔在沉淀优质粗粒重铀酸盐工业生产中的应用结果。
F2 water purification liquid acetone precipitation, the RP-C18 column repeated purification.
F2水液丙酮沉淀纯化后，上c 18反相柱反复纯化。
Combining the ion precipitation with column chromatography to prepare tea polyphenol was studied.
研究了离子沉淀法和大孔吸附树脂层析法结合制备茶多酚的工艺。
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.
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.
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。
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