All FM GC × LP GC–qMS applications were performed on a system consisting of two independent Shimadzu GC2010 gas
chromatography (GC1 and GC2), and a QP-2010 Ultra quadrupole mass spectrometer (Shimadzu, Kyoto, Japan). The two GC ovens were linked through a heated transfer line. The primary GC was equipped with an AOC-20i auto-injector and a split-splitless injector (310 ◦C)