Atmospheric Pressure Laser Ionization Mass Spectrometry with Tunable UV Wavelength Utilizing an Optical Parametric Oscillator

IF 6.7 1区化学 Q1 CHEMISTRY, ANALYTICAL

Analytical Chemistry Pub Date : 2024-12-23 DOI:10.1021/acs.analchem.4c05040

Fabian Etscheidt, Christopher P. Rüger, Carolin Schwarz, Ole Tiemann, Anika Neumann, Helly J. Hansen, Thorsten Streibel, Sven Ehlert, Ralf Zimmermann

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Abstract

To our knowledge, this study presents the first implementation of wavelength-resolved resonance-enhanced multiphoton ionization (REMPI) spectroscopy under atmospheric pressure ionization conditions using a high-resolution mass spectrometric system. Atmospheric pressure laser ionization MS spectroscopic measurements were conducted on over 70 different polycyclic aromatic hydrocarbons (PAHs) and hetero-PAHs (N, S, and O) in standard solutions, as well as three complex PAH-containing samples. The results demonstrate the successful transfer of REMPI spectroscopy from vacuum to atmospheric pressure conditions, maintaining spectral integrity without significant band broadening. The obtained spectral data add an orthogonal dimension to mass spectrometry, providing structural insights into aromatic core motifs and enabling isomeric differentiation. This differentiation is further enhanced by linear regression algorithms, which allow for the semiquantitative analysis of isomer mixtures. Comparison between standard spectra and complex sample spectra reveals high correlation values for certain peaks, strongly indicating the presence of specific PAHs and distinguishing between phenanthrene and anthracene in fossil- and biobased samples.

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来源期刊

Analytical Chemistry 化学-分析化学

CiteScore

12.10

自引率

12.20%

发文量

1949

审稿时长

1.4 months

期刊介绍： Analytical Chemistry, a peer-reviewed research journal, focuses on disseminating new and original knowledge across all branches of analytical chemistry. Fundamental articles may explore general principles of chemical measurement science and need not directly address existing or potential analytical methodology. They can be entirely theoretical or report experimental results. Contributions may cover various phases of analytical operations, including sampling, bioanalysis, electrochemistry, mass spectrometry, microscale and nanoscale systems, environmental analysis, separations, spectroscopy, chemical reactions and selectivity, instrumentation, imaging, surface analysis, and data processing. Papers discussing known analytical methods should present a significant, original application of the method, a notable improvement, or results on an important analyte.