Improved Flow-Through Gc/Ir Lightpipe
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
A typical gas chromatograph (GC) infrared (IR) analytical system is schematically shown in Fig. l. A sample and carrier gas are introducedinto an injector l and passed through a GC column 2 where the sample is separated into its constituents. The output or GC effluent from column 2 is passed into a lightpipe 3 and to such additional detectors or waste, as desired. IR energy is passed through lightpipe 3 and directed onto an IR detector 4 for analysis of the GC effluent as it flows through the lightpipe. Shown in Figs. 2 and 3 are two different ways for reducing the internal pressure in the lightpipe to thereby reduce the effects of peak broadening of gases flowing through the lightpipe.