supported by the Young Talent Fund of University Association for Science and Technoloqy in Shaanxi, China (No. 20160222);The PetroChina Innovation Foundation (No. 2016D-5007-0404);the Natural Science Basic Research Plan in Shaanxi Province of China (No. 2017JQ2034)
The nitrogen-containing compounds in Changqing crude oil, its atmospheric residue(AR), and vacuum reside(VR) were characterized by negative and positive ion electrospray ionization(ESI) Fourier transform ion cyclotron...