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Abstract. The combination of a microcolumn liquid chromatograph with a gas chromatograph is described. The new interface is based on the principle of pneumatic regulation of the effluent flow from the microcolumn chromatograph. In the course of operation, the analyte does not contact the metal components of the apparatus.

A possibility is demonstrated of the use of the flame ionization detector (FID) and the alkali metal flame ionization detector (AFID) in capillary liquid chromatography. The minimum detectable mass flow rates for the FID and the AFID were ≈10-12 and ≈10-13 g s-1, respectively. The detection time constant is about 1 s allows for operation with columns of inner diameters of 10-60 μm and lengths above 1 m. The suggested design of the detector is described. The burner allows the total effluent from the column to enter the detector. The temperature of the end of the capillary column in the burner is controllable.