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Title: Broadband ion mobility deconvolution for rapid analysis of complex mixtures
High resolving power ion mobility (IM) allows for accurate characterization of complex mixtures in high-throughput IM mass spectrometry (IM-MS) experiments. We previously demonstrated that pure component IM-MS data can be extracted from IM unresolved post-IM/collision-induced dissociation (CID) MS data using automated ion mobility deconvolution (AIMD) software [Matthew Brantley, Behrooz Zekavat, Brett Harper, Rachel Mason, and Touradj Solouki, J. Am. Soc. Mass Spectrom. , 2014, 25 , 1810–1819]. In our previous reports, we utilized a quadrupole ion filter for m / z -isolation of IM unresolved monoisotopic species prior to post-IM/CID MS. Here, we utilize a broadband IM-MS deconvolution strategy to remove the m / z -isolation requirement for successful deconvolution of IM unresolved peaks. Broadband data collection has throughput and multiplexing advantages; hence, elimination of the ion isolation step reduces experimental run times and thus expands the applicability of AIMD to high-throughput bottom-up proteomics. We demonstrate broadband IM-MS deconvolution of two separate and unrelated pairs of IM unresolved isomers ( viz. , a pair of isomeric hexapeptides and a pair of isomeric trisaccharides) in a simulated complex mixture. Moreover, we show that broadband IM-MS deconvolution improves high-throughput bottom-up characterization of a proteolytic digest of rat brain tissue. To our knowledge, this manuscript is the first to report successful deconvolution of pure component IM and MS data from an IM-assisted data-independent analysis (DIA) or HDMS E dataset.  more » « less
Award ID(s):
1709526
PAR ID:
10061084
Author(s) / Creator(s):
; ; ; ;
Date Published:
Journal Name:
The Analyst
Volume:
143
Issue:
11
ISSN:
0003-2654
Page Range / eLocation ID:
2574 to 2586
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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