Fig. 3. (a) Experimental spectrum (A) obtained by GC–(EI)TOF MS for the peak at 32.22 min. Theoretical mass spectra (B)–(C) of the two candidates proposed for the unknown
compound given in (A). (b) Low and high energy spectra from the chromatographic peak obtained by GC–(APCI)QTOF MS for the unknown compound detected by GC–(EI)TOF
MS.