Agilent Technologies Inc., 2850 Centerville Rd., Wilmington, DE 19808, USA.
J Chromatogr A. 2010 Mar 12;1217(11):1830-7. doi: 10.1016/j.chroma.2010.01.027. Epub 2010 Jan 18.
Flow modulation of methane-doped carrier gas is used to visualize the second dimension hold-up time in GC x GC continuously throughout the run. This provides an internal reference of hold-up time and presents a straightforward means of examining retention in each dimension of GC x GC. Retention factors on similar and dissimilar column pairs are examined. Stationary phase bleed is shown to be retained by the second dimension column.
采用甲烷掺杂载气的流量调制，在整个运行过程中实现 GC×GC 中二维保留时间的可视化。这提供了保留时间的内部参考，并提供了一种简单的方法来检查 GC×GC 中每个维度的保留情况。检查了相似和不同柱对的保留因子。结果表明，固定相流失被第二维柱保留。
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