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Solvent and flow rate effects on the observed compositional profiles and the relative intensities of radical and protonated species in atmospheric pressure photoionization mass spectrometry

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Thomas, Mary J., Chan, Ho Yi Holly, Palacio Lozano, Diana Catalina and Barrow, Mark P. (2022) Solvent and flow rate effects on the observed compositional profiles and the relative intensities of radical and protonated species in atmospheric pressure photoionization mass spectrometry. Analytical Chemistry, 94 (12). pp. 4954-4960. doi:10.1021/acs.analchem.1c03463 ISSN 1520-6882.

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Official URL: https://doi.org/10.1021/acs.analchem.1c03463

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Abstract

Sample preparation and instrument parameters have regularly been demonstrated to impact upon the observed results in atmospheric pressure photoionization, mass spectrometry (MS), and analytical techniques in general but may be overlooked when such methods are applied to the characterization of real-world samples. An initial investigation into different solvent systems demonstrated that the inclusion of ethyl acetate inverted the ratio of relative intensities of radical and protonated species (R/P). Design of experiments was performed and indicated that the injection flow rate is also a significant factor. The impact of the solvent system and flow rate on signal intensity, the observed compositional profile, and R/P of selected molecular groups is demonstrated further. An inversion of R/P is observed at higher flow rates in solvent systems commonly used in petroleomics studies, effecting a loss of molecular speciation. The findings presented reiterate the critical importance in considering experimental parameters when interpreting the results of analytical procedures.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
T Technology > TP Chemical technology
Divisions: Faculty of Science, Engineering and Medicine > Science > Chemistry
SWORD Depositor: Library Publications Router
Library of Congress Subject Headings (LCSH): Photoionization , Mass spectrometry -- Technique, Petroleum -- Analysis, Solvents , Solvents -- Fluid dynamics
Journal or Publication Title: Analytical Chemistry
Publisher: American Chemical Society (ACS)
ISSN: 1520-6882
Official Date: March 2022
Dates:
DateEvent
March 2022Published
14 March 2022Available
28 January 2022Accepted
Volume: 94
Number: 12
Page Range: pp. 4954-4960
DOI: 10.1021/acs.analchem.1c03463
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 1 April 2022
Date of first compliant Open Access: 1 April 2022
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/L015307/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
275910721/FP44842-039-2015Newton Fundhttp://dx.doi.org/10.13039/100010897
FP44842-039-2015Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)http://dx.doi.org/10.13039/100007637

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