High-mass cluster ions of ionic liquids in positive-ion and negative-ion DART-MS and their application for wide-range mass calibrations

Eight ionic liquids (ILs) are subjected to both positive-ion and negative-ion direct analyses in real time (DART) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS). First, their ability to deliver evenly distributed cluster ion series covering a wide m / z range is explored....

Full description

Saved in:
Bibliographic Details
Published in:Analytical and bioanalytical chemistry 2014-05, Vol.406 (12), p.2853-2862
Main Author: Gross, Jürgen H.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Biochemistry
Calibration
Characterization and Evaluation of Materials
Chemical properties
Chemistry
Chemistry and Materials Science
Clusters
Clusters (Chemistry)
Cyclotron resonance
Food Science
Fourier transforms
Identification and classification
Ionic liquids
Laboratory Medicine
Mass spectrometry
Mathematical analysis
Methods
Monitoring/Environmental Analysis
Polarity
Research Paper
Scientific imaging
Silicones
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Eight ionic liquids (ILs) are subjected to both positive-ion and negative-ion direct analyses in real time (DART) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS). First, their ability to deliver evenly distributed cluster ion series covering a wide m / z range is explored. Then, one of the ILs exhibiting particularly useful cluster ion series in either ion polarity is applied for mass calibration. Using 1-butyl-3-methylimidazolium tricyanomethide delivers positive cluster ions suitable for mass calibration in the m / z 100–4,000 range and covers the m / z 100–2,000 range in negative-ion DART-MS. The corresponding mass reference lists are provided for either polarity. Furthermore, based on 1-butyl-3-methylimidazolium tricyanomethide, a high-mass record of m / z  > 5,000 for positive-ion DART-MS is presented. The mass calibration procedure is finally validated by application to established standard compounds such as polydimethylsiloxanes, perfluorononanoic acid, and Ultramark 1621, a mixture of hexakis (fluoroalkoxy) phosphazenes. Further proof is presented by consistent exact mass differences between adjacent cluster ions. Figure Direct analysis in real time mass spectrometry (DART-MS) can deliver ionic liquid cluster ions reaching well beyond m/z 5,000. These positive and negative cluster ions may well serve for wide-range mass calibration in DART-MS
ISSN:1618-2642
1618-2650
DOI:10.1007/s00216-014-7720-0