Anal Chem 2020 10 11;92(19):13211-13220. Epub 2020 Sep 11.
Center for Biomedical Mass Spectrometry, Boston University School of Medicine, 670 Albany Street, Room 508, Boston, Massachusetts 02118, United States.
Ion mobility-mass spectrometry (IM-MS) has become a powerful tool for glycan structural characterization due to its ability to separate isomers and provide collision cross section (CCS) values that facilitate structural assignment. However, IM-based isomer analysis may be complicated by the presence of multiple gas-phase conformations of a single structure that not only increases difficulty in isomer separation but can also introduce the possibility for misinterpretation of conformers as isomers. Here, the ion mobility behavior of several sets of isomeric glycans, analyzed as their permethylated derivatives, in both nonreduced and reduced forms, was investigated by gated-trapped ion mobility spectrometry (G-TIMS). Read More