Chemical lonization mass spectrometry of wax esters

Chemical ionization (CI) mass spectra of long‐chain saturated, monenoic and dienoic wax ester analogues, using isobutane and methane as reagent gases, are reported and compared. Because less fragmentation occurs, CI spectra are simpler than the electron impact spectra. The quasi molecular ion (M+1) is the base peak in the spectra. Saturated, monenoic and dienoic wax ester mixtures have been analyzed by this technique.