Suppose an organic compound has a higher heat conductivity than the carrier gas. How would its GC signal appear on a chromatogram run on an instrument with
(a) a thermal conductivity detector?
(b) a flame ionization detector?

Question

Quizplus · Accepted Answer

The Answer is (a) The signal will appear as a dip from the baseline instead of a peak rising from the baseline because the sample arm becomes cooler (instead of hotter) relative to the feference arm in the Wheatstone bridge.
(b) The signal will appear as a normal peak because a flame ionizaiton detector is not affected by thermal conductivity.

Suppose an Organic Compound Has a Higher Heat Conductivity Than