Gas Chromatography (GC): The Separation and Analysis of Heptane, Tetrahydrofuran,
11 March 2008
The primary objective of this experiment is to separate the components of a mixture,
which are heptane, tetrahydrofuran, and 1-propanol, using a gas chromatograph. A gas
chromatograph is used when the mobile phase is a gas, in this case, helium.
There are two injection ports on a gas chromatograph (A and B), which are determined to
be polar and nonpolar respectively. Once a compound is ejected into the injection port, a carrier
gas, which is the mobile phase, or helium, carries it to the stationary phase, or in this case, the
column. This process aids in the separation of the compound.
If the column is polar, the nonpolar compounds will come out first. For example, if the
column is polar, heptane will exit fist, followed by tetrahydrofuran, then 1-propanol. If the
column is nonpolar, then the opposite effect would occur. However, in this experiment, the polar
compounds exit first, meaning the column is nonpolar.