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。

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Using two column process, the light composition was separated from pre column, the refinary methanol was separated from main column. The purity of the product reached 99.8%.

采用双塔流程，轻组分由预塔分离，从主塔分离出的精甲醇产品纯度达998％。

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The method involved solid-phase extraction of insulin from plasma and pre-column derivatization of insulin with fluorescamine.

该方法涉及从血浆中固相提取胰岛素，以及用荧光胺对胰岛素进行柱前衍生。

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Moreover, modern car assembly relies heavily on pre-assembly of parts such as entire dash boards with the stereo, the instrument panel and the steering column already built in.

BBC: NEWS | Business | GM Europe still faces major challenges