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Californium-252 plasma desorption mass spectroscopy.

R D Macfarlane, D F Torgerson

    Science (New York, N.Y.)
    |March 5, 1976
    PubMed
    Summary
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    252Cf-PDMS mass spectrometry effectively analyzes diverse molecules like peptides and natural products, providing structural insights non-destructively. This technique offers high sensitivity and mass resolution for identifying compounds.

    Area of Science:

    • Analytical Chemistry
    • Biochemistry
    • Physical Chemistry

    Background:

    • Mass spectrometry is crucial for molecular analysis.
    • Existing techniques may have limitations in sensitivity, sample destruction, or mass range.

    Purpose of the Study:

    • To demonstrate the capability of Californium-252 Plasma Desorption Mass Spectrometry (252Cf-PDMS) for analyzing various organic molecules.
    • To evaluate the sensitivity, mass range, and non-destructive nature of the 252Cf-PDMS technique.

    Main Methods:

    • Utilizing 252Cf-PDMS to generate mass spectra.
    • Analyzing a range of compounds including amino acids, peptides, nucleotides, and natural products.
    • Operating in both positive and negative ion modes.

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    Main Results:

    • Successfully produced quasi-molecular ions for a wide array of compounds.
    • Observed quasi-molecular ions in both positive and negative ion modes for many samples.
    • Demonstrated a non-destructive analysis method with sample recovery.
    • Obtained fragmentation patterns providing structural information.
    • Achieved nanogram-level sensitivity, with potential for picogram detection.
    • Provided mass resolution sufficient for elemental identification up to mass 500.
    • Indicated potential to extend the measurable mass range to over 3000 Da.

    Conclusions:

    • 252Cf-PDMS is a versatile and powerful technique for analyzing diverse biomolecules and natural products.
    • The method offers significant advantages in terms of non-destructiveness, sensitivity, and structural information retrieval.
    • Further advancements in time-of-flight techniques could extend the mass range capabilities of 252Cf-PDMS.