Unified chromatograph for gas chromatography, supercritical fluid chromatography and micro-liquid chromatography

Abstract

A unified chromatograph with a single-valve switching system, which allows single separation mode and sequential analyses, is described. High-resolution GC, supercritical fluid chromatography (SFC), and micro-LC analyses for a variety of samples, on either open tubular or packed capillary columns, are demonstrated. Sequential GC–SFC analyses for samples of a pesticide-contaminated vegetable oil and a household wax show the separation power of the unified chromatograph for samples with a wide range of volatilities. This paper illustrates the potential usefulness of unified chromatography in practical analysis and the possibility of the unification and minimization of chromatographic instruments.