Figure 5
From: Release of organic nitrogen compounds from Kerogen via catalytic hydropyrolysis
Partial mass chromatograms representing the C2-alkylbenzoquinolines (m/z 207) in polar non-hydrocarbon fractions isolated by C18 NEC SPE of the hydropyrolysate samples (a) KC3 and (b) KC4 (see Table 1) and (c) Miller oil. Key: S = shielded isomer(s).