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。
First, the separation of L-Valine on a single chromatographic column was investigated.
本文首先研究了缬氨酸在单根色谱柱上的分离情况。
Several factors affecting the column performances in the preparation procedure were investigated and the chromatographic separation conditions were optimized.
考察了柱制备过程中影响柱性能的主要因素，优化了色谱分离条件。
The effect of the chromatographic conditions such as composition of the eluent, flow rate and column temperature on the separation was studied.
研究了色谱条件如洗脱剂组成、流速和柱温对分离的影响。
Objective to solve the problems on efficiency in chromatographic separation and life of chromatographic column in assay method of acetic acid.
前言：目的解决培养液中有机酸代谢产物-乙酸检测方法中存在的色谱分离效果差和色谱柱使用寿命短的问题。
OBJECTIVE: to establish a pre column chiral derivatization reversed phase high performance liquid chromatographic method for the separation of ketoprofen enantiomers.
目的：建立柱前手性衍生化反相高效液相色谱法分离酮洛芬对映体的方法。
Its chromatographic characteristics including column efficiency, operating temperature range, thermal stability, polarity and selectivity were studied, and its separation mechanism was discussed.
用其涂渍的弹性石英管柱柱效较高，使用温度范围较宽，热稳定性和选择性较好。研究了固定液对样品的分离机理。
Its chromatographic characteristics including column efficiency, operating temperature range, thermal stability, polarity and selectivity were studied, and its separation mechanism was discussed.
用其涂渍的弹性石英管柱柱效较高，使用温度范围较宽，热稳定性和选择性较好。研究了固定液对样品的分离机理。
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