absorbance of a particular peak in the spectrum, or integrating the total IR
absorbance over a range, an infrared chromatogrammay be generated, showing
how each component relates to the IR sensitivity.Example
A sample of the herb basil was extracted with a solvent. The extract was then
injected into the GC, which had a 50 m capillary column with a methyl silicone
coating maintained at 40°C. The chromatogram showed 7 major peaks and over
20 minor peaks. Each major peak gave a good IR spectrum, and these were
identified as eucalyptol, estragol, eugenol, and linalool, plus various terpenes
and cinnamates. Many of the minor components were also identified.F4 – Gas chromatography-infrared spectrometry 301