THEORETICAL INVESTIGATION ON THE NEW-TYPE 2-DIMENSIONAL PACKED-CAPILLARY COLUMN GC-SYSTEM .2.

The rules that the column conditions affect column efficiency are inve stigated by chromatographic dynamics in this paper. It is further prov ed that the higher precolumn temperature and the faster precolumn carr ier gas is beneficial to the column efficiency of the system of long c apillary with small packed column. Considering the main column conditi ons:and split ratio, it was also proved theoretically and experimental ly that the proper main column temperature, carrier gas speed and the larger split ratio is profitable to improving the column efficiency in two-dimensional GC system.