Light Pipe for GC IR Spectrometer
Original Publication Date: 1981-Oct-01
Included in the Prior Art Database: 2005-Feb-12
A gas chromatograph (GC) may be connected in an infrared (IR) spectrometer so that the effluent from the GC is analyzed by the spectrometer. To do this, it is common to use a light pipe through which both the gas effluent and infrared energy are passed. Shown in the drawing is a light pipe which helps prevent energy losses from an edge thereof, allows a longer, narrower bore to be used with resultant greater sensitivity, and decreases the dead volume of gas in the tube while minimizing swirling.