Enhancements in travelling wave ion mobility resolution

Rapid Communications in Mass Spectrometry - Tập 25 Số 11 - Trang 1559-1566 - 2011
Kevin Giles1, Jonathan P. Williams1, Iain D. G. Campuzano2,1
1Waters Corporation, MS Technologies Centre, Floats Road, Manchester, M23 9LZ UK
2I. Campuzano, Amgen Inc., Department of Molecular Structure, Thousand Oaks, CA 91320 USA.

Tóm tắt

The use of ion mobility separation to determine the collision cross‐section of a gas‐phase ion can provide valuable structural information. The introduction of travelling‐wave ion mobility within a quadrupole/time‐of‐flight mass spectrometer has afforded routine collision cross‐section measurements to be performed on a range of ionic species differing in gas‐phase size/structure and molecular weight at physiologically relevant concentrations. Herein we discuss the technical advances in the second‐generation travelling‐wave ion mobility separator, which result in up to a four‐fold increase in mobility resolution. This improvement is demonstrated using two reverse peptides (mw 490 Da), small ruthenium‐containing anticancer drugs (mw 427 Da), a cisplatin‐modified protein (mw 8776 Da) and the noncovalent tetradecameric chaperone complex GroEL (mw 802 kDa). What is also shown are that the collision cross‐sections determined using the second‐generation mobility separator correlate well with the previous generation and theoretically derived values. Copyright © 2011 John Wiley & Sons, Ltd.

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Rapid Communications in Mass Spectrometry

Tập 25 Số 11

1559-1566

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