Qualitative and Quantitative Distinction of ortho-, meta-, and para-Fluorotoluene by Means of Chirped Femtosecond Laser Ionization

Qualitative and Quantitative Distinction of ortho-, meta-, and para-Fluorotoluene by Means of Chirped Femtosecond Laser Ionization

Femtosecond-laser ionization mass spectrometry (fs-LIMS) is demonstrated to be a powerful analytical method providing access to the qualitative distinction of structural isomers of ortho-, meta-, and para-fluorotoluene. The key point of the approach presented is a systematic variation of the spectra...

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Bibliographic Details
Published in:Analytical chemistry (Washington) Vol. 92; no. 7; pp. 5492 - 5499
Main Authors: Schäfer, Viola, Weitzel, Karl-Michael
Format: Journal Article
Language:English
Published: United States American Chemical Society 07-04-2020
Subjects:
Chemistry
Femtosecond pulsed lasers
Fluorotoluene
Fragmentation
Ionization
Ions
Isomers
Lasers
Mass spectra
Mass spectrometry
Mass spectroscopy
Mathematical analysis
Qualitative analysis
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Summary:Femtosecond-laser ionization mass spectrometry (fs-LIMS) is demonstrated to be a powerful analytical method providing access to the qualitative distinction of structural isomers of ortho-, meta-, and para-fluorotoluene. The key point of the approach presented is a systematic variation of the spectral phase of the fs-laser pulses, which characteristically affects the fragmentation pattern observed in the mass spectra. Variation of the linear chirp parameter is also helpful for rationalizing the fragmentation mechanism. Ultimately two ternary mixtures of the three title isomers are quantitatively analyzed in situ with an accuracy of 5% for the molar fractions.
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ISSN:0003-2700
1520-6882
DOI:10.1021/acs.analchem.0c00234