Ultraviolet Photodissociation and Collision Induced Dissociation for Qualitative/Quantitative Analysis of Low Molecular Weight Compounds by Liquid Chromatography-Mass Spectrometry

20 September 2023, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Collision induced dissociation (CID) is the most wildly used fragmentation technique for qualitative and quantitative determination of low molecular weight compounds (LMWC). Ultraviolet photodissociation (UVPD) has been mainly investigated for the analysis of peptides and lipids while only in a limited way for LMWC. A triple quadrupole linear ion trap instrument has been modified to allow ultraviolet photodissociation (UVPD) in the end of the q2 region enabling various workflows with and without data dependent acquisition (DDA) combining CID and UVPD in the same LC-MS analysis. The performance of UVPD, with a 266 nm laser, is compared to CID for a mix of 90 molecules from different classes of LMWC including peptides, pesticides, pharmaceuticals, metabolites, and drugs of abuse. These two activation methods offer complementary fragments as well as common fragments with similar sensitivities for most analytes investigated. The versatility of UVPD and CID is also demonstrated for quantitative analysis in human plasma of bosentan and its desmethyl metabolite, used as model analytes. Different background signals are observed for both fragmentation methods as well as unique fragments which opens the possibility to develop selective quantitative assay with improved sample throughput, in particular for analytes present in different matrices

Keywords

Ultraviolet photodissociation
collision induced dissociation
LC-MS/MS
qualitative analysis
quantitative analysis
low molecular weight compounds

Supplementary materials

Title
Description
Actions
Title
Supporting Information
Description
List of compounds analyzed Product Ion spectra of UVPD and CID
Actions

Comments

Comments are not moderated before they are posted, but they can be removed by the site moderators if they are found to be in contravention of our Commenting Policy [opens in a new tab] - please read this policy before you post. Comments should be used for scholarly discussion of the content in question. You can find more information about how to use the commenting feature here [opens in a new tab] .
This site is protected by reCAPTCHA and the Google Privacy Policy [opens in a new tab] and Terms of Service [opens in a new tab] apply.