4 Installing Capillary Columns and Setting Analytical Flow Lines
4.4 Capillary TCD Analysis
57
GC-2014
TCD signals do not necessarily have a plus peak because they are determined by relationship of heat
conduction between a substance to be analyzed and carrier gas. However, the data processing unit
normally calculates the area of a plus peak. When a minus peak is detected, “signal polarity” needs to
be inverted into a plus peak.
“Signal polarity” can be changed using the time program during analysis. (For detailed descriptions
about setting the time program, refer to “16.3 Time Program.”)
NOTE
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