A gas chromatographer vaporizes a sample and then passes it through a column. The rate at which the molecules will pass through the column depends on their attraction to it. For example, in a non-polar column, larger molecules will be more strongly attracted and hence will take longer to make their way through the column than smaller ones. This allows us to see how many different substances are contained in a sample, their relative abundances, and some information regarding their chemical nature.
Hewlett Packard HP-5890 with HP7673 autosampler and flame ionization detector
Gow Mac GC with thermal conductivity detectors
Page last modified May 11, 2011