AN APPROACH TO THE THEORY OF LINEAR DENSI TY PROGRAMMING IN SUPERCRITICAL-FLUID CHROMATOGRAPHY

In the analysis of complex mixtures by supercritical fluid chromatogra phy density programming is usually needed. The retention characteristi cs under linear density programming was investigated in this paper. Ba sed on the capillary column model, the retention value and height equi valent to a theoretical plate equation have been derived as follows. [ GRAPHICS] where [GRAPHICS] where [GRAPHICS] The derived equation of re tention value has been verified by experimental results using capillar y and micro-packed columns at different operating conditions.