How do I interpret a graph for gas chromatography?
A gas chromatogram, by defintion, is a plot of a RESPONSE against the RETENTION TIME. Chemical substances as gases are retained on the liquid column (stationary phase) with a flow gas being the carrier (mobile phase) through the column. At the end of the column is some means of detection…it might be a thermal conductivity sensor with somewhat nonspecifically senses the component gases which separate by a cooling of an electrically conductive element in the detection electrical circuitry, or it might be a flame combustion or ionization system that burns the component as it elutes, and the burning is sensed as well by an electrically conductive loop in the detection circuitry. There are many other types of detection as well. The peak height or alternatively the peak area is used to quantitate the amount of substance. Before you analyze your unknown sample, you must inject the GC with pure quantities of known amounts of the substances that you believe are in your unknown sample. For ins
