从七十年代起多维气相色谱法在国外得到迅速发展。目前国外常用的多维系统有(1)毛细管柱—毛细管柱系统(CCS);(2)毛细管柱—冷阱—毛细管柱系统(CTCS);(3)填充柱—填充柱系统(PPS);(4)填充柱—冷阱—毛细管柱系统(PTCS)。因为在一般情况下,填充柱流出峰的半宽比毛细管柱宽,采用直接连接法会大大损失毛细管柱的柱效,所以国外至今还没有填充柱与毛细管柱直接连接的多维柱 Multidimensional gas chromatography has developed rapidly abroad since the 1970s. At present, multidimensional systems commonly used in foreign countries are: (1) capillary column-capillary column system (CCS); (2) capillary column-cold trap- capillary column system 4) Packed Column - Cold Trap - Capillary Column System (PTCS). Because under normal circumstances, the width of the packed column outflow peak width than the capillary column, using the direct connection method will greatly lose the capillary column efficiency, so far there is no foreign column and capillary column directly connected to the multi-dimensional column