Issaq H J, Fox S D, Muschik G M
Program Resources, Inc., NCI-FCRF, Frederick, Maryland 21701.
J Chromatogr Sci. 1989 Apr;27(4):172-5. doi: 10.1093/chromsci/27.4.172.
The separation of coeluting congeners of Aroclor 1242, 1254, and 1260 on a DB-1 (low polarity) capillary gas chromatographic (GC) column is achieved when cuts of those peaks are transferred onto a smectic liquid crystalline column, which is commercially available. This procedure requires the use of a gas chromatograph equipped with two independent ovens for optimizing the temperature conditions of each column. Excellent base line separations are achieved on multicuts, up to six, of the same injection. This unique multidimensional/multimodal capillary GC system, in which the two separation modes of vapor pressure and molecule geometry are employed, is a powerful analytical technique for the separation of complex organic mixtures.
当将Aroclor 1242、1254和1260共洗脱同系物的色谱峰馏分转移到市售的近晶型液晶柱上时，可在DB - 1（低极性）毛细管气相色谱（GC）柱上实现它们的分离。此方法需要使用配备两个独立柱箱的气相色谱仪，以优化每根色谱柱的温度条件。对于同一进样的多达六个馏分，均可实现出色的基线分离。这种独特的多维/多模式毛细管GC系统采用了蒸气压和分子几何结构这两种分离模式，是分离复杂有机混合物的强大分析技术。
