standard guaiacol has been indicated in both cases with a labelled
arrow. There is little, if any, indication of a definite peak due to
guaiacol that can be seen in the TIC chromatogram. Various EIC
chromatograms can be pulled out of the TIC data matrix. EIC
chromatograms often have greatly improved selectivity if an
uncommon characteristic mass is selected. The greatest chromatographic
selectivity was observed in the EIC chromatogram using
only m/z 124. Selectivity using only m/z 124 is achieved primarily