TY - JOUR A1 - Trimpin, S. A1 - Lee, C. A1 - Weidner, Steffen A1 - El-Baba, T. A1 - Lutomski, C. A1 - Inutan, E. A1 - Foley, C. A1 - Ni, C.-K. A1 - McEwen, C. T1 - Unprecedented Ionization Processes in Mass SpectrometryProvide Missing Link between ESI and MALDI T2 - ChemPhysChem N2 - In the field of mass spectrometry,producing intact, highly-charged protein ions from surfaces is a conundrum with significant potential payoff in application areas ranging from bio-medical to clinical research. Here, we report on the ability to form intact, highly-charged protein ions on high vacuum time-of-flight mass spectrometers in the linear and reflectron modes achievable using experimental conditions that allow effective matrix removal from both the sample surfaces and from the charged clusters formed by the laser Ablation event. The charge states are the highest reported on high vacuum mass spectrometers, yet they remain at only around athird of the highest charge obtained using laser ablation with a suitable matrix at atmospheric pressure. Other than physical instrument modifications, the key to forming abundant and stable highly-charged ions appears to be the volatility of the matrix used. Cumulative results suggest mechanistic links between the ionization process reported here and traditional ionization methods of electrospray ionization and matrix-assisted laser desorp-tion/ionization. PB - Wiley-VCH KW - MALDI KW - Electrospray KW - Mass spectrometry KW - Ionization PY - 2018 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/44404 AN - OPUS4-44404 SN - 1439-4235 SN - 1439-7641 VL - 19 IS - 5 SP - 581 EP - 589 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany