The Application of an Expanded Multidimensional GC System to Complex Fragrance Evaluations

Abstract

A comprehensive multidimensional GC system is described which can greatly simplify the tasks of separation and odor evaluation for complex fragrance blends. Two dual-column switching systems based on the Deans (1) pressure balance technique are shown operating in tandem, making possible a unique double heart-cutting capability. This arrangement permits optimum separations to be realized through the normal two-column heart-cut operations prior to a second heart-cut, sending isolated peaks or fractions from the effluent of column 2 to a sniffing port for fragrance evaluation. The applications of other ancillary devices such as a sniffing port, fraction collector, and cold trap are also described.