对预柱吸附法捕集鲜花头香的条件进行了讨论。
The conditions of trapping of fragrance volatiles have also been discussed.
当含水溶剂通过预柱在线净化后，根据空白梯度色谱图可测试有机溶剂的纯度。
When the aqueous solvent (solvent a) is cleaned up in terms of an on-line precolumn, the purity of the organic solvent (solvent b) can be tested according to the chromatogram of the blank gradient.
洗脱物经预柱脱盐和浓缩后进入毛细管反相柱进行反相分离，分离后的肽段直接进入质谱仪离子源进行一级和二级质谱的分析。
Following desalinisation the eluted peptides were further purified by reversed-phase capillary column(150 mm 75 m) and online analysed by the coupled tandem mass spectrometry.
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