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  • Title: High-resolution field desorption/ionization fourier transform ion cyclotron resonance mass analysis of nonpolar molecules.
    Author: Schaub TM, Hendrickson CL, Qian K, Quinn JP, Marshall AG.
    Journal: Anal Chem; 2003 May 01; 75(9):2172-6. PubMed ID: 12720358.
    Abstract:
    We report the first field desorption ionization broadband high-resolution (m/Deltam(50%) approximately 65 000) mass spectra. We have interfaced a field ionization/field desorption source to a home-built 9.4-T FT-ICR mass spectrometer. The instrumental configuration employs convenient sample introduction (in-source liquid injection) and external ion accumulation. We demonstrate the utility of this configuration by generating high-resolution positive-ion mass spectra of C(60) and a midboiling crude oil distillate. The latter contains species not accessible by common soft-ionization methods, for example, low-voltage electron ionization, electrospray ionization, and matrix-assisted laser desorption/ionization. The present work demonstrates significant advantages of FI/FD FT-ICR MS for analysis of nonpolar molecules in complex mixtures.
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