主题：【已应助】5篇英文文献，谢谢！

麻烦查找一下这5篇文献，谢谢！其中前两篇是网上刚出来的，还没有期卷号。

【序号】：1
【作者】：Andras Gaspar, Elio Zellermann, Sami Lababidi, Jennifer Reece, and Wolfgang Schrader
【题名】： Impact of different ionization methods on the molecular assignments of asphaltenes by FT-ICR Mass Spectrometry
【期刊】： Anal. Chem.
【年、卷、期、起止页码】： Just Accepted Manuscript
【全文链接】：http://pubs.acs.org/doi/abs/10.1021/ac300133p

【序号】：2
【作者】：Andras Gaspar, Elio Zellermann, Sami Lababidi, Jennifer Reece, and Wolfgang Schrader
【题名】：Characterization of SARA heavy crude oil fractions by Atmospheric Pressure Laser Ionization (APLI) FT-ICR Mass Spectrometry
【期刊】：Energy Fuels
【年、卷、期、起止页码】：  Just Accepted Manuscript
【全文链接】：http://pubs.acs.org/doi/abs/10.1021/ef3001407

【序号】：3
【作者】：Yunju Cho†, Jeong-Geol Na‡, Nam-Sun Nho‡, SungHong Kim*§, and Sunghwan Kim*†
【题名】： Application of Saturates, Aromatics, Resins, and Asphaltenes Crude Oil Fractionation for Detailed Chemical Characterization of Heavy Crude Oils by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry Equipped with Atmospheric Pressure Photoionization
【期刊】： Energy Fuels
【年、卷、期、起止页码】：2012, 26 (5), pp 2558–2565
【全文链接】：http://pubs.acs.org/doi/abs/10.1021/ef201312m

【序号】：4
【作者】：Vladislav V. Lobodin†, Alan G. Marshall*†‡, and Chang Samuel Hsu*§
【题名】： Compositional Space Boundaries for Organic Compounds
【期刊】： Anal. Chem.
【年、卷、期、起止页码】：2012, 84 (7), pp 3410–3416
【全文链接】：http://pubs.acs.org/doi/abs/10.1021/ac300244f

【序号】：5
【作者】：Feng Xian†, Christopher L. Hendrickson*†‡, and Alan G. Marshall*†‡
【题名】：High Resolution Mass Spectrometry
【期刊】： Anal. Chem.
【年、卷、期、起止页码】：2012, 84 (2), pp 708–719
【全文链接】：http://pubs.acs.org/doi/abs/10.1021/ac203191t