Journal Article

A General Unknown Screening Procedure for Drugs and Toxic Compounds in Serum using Liquid Chromatography-Electrospray-Single Quadrupole Mass Spectrometry

N. Venisse, P. Marquet, E. Duchoslav, J.L. Dupuy and G. Lachâtre

in Journal of Analytical Toxicology

Volume 27, issue 1, pages 7-14
Published in print January 2003 | ISSN: 0146-4760
Published online January 2003 | e-ISSN: 1945-2403 | DOI: http://dx.doi.org/10.1093/jat/27.1.7
A General Unknown Screening Procedure for Drugs and Toxic Compounds in Serum using Liquid Chromatography-Electrospray-Single Quadrupole Mass Spectrometry

More Like This

Show all results sharing these subjects:

  • Medical Toxicology
  • Toxicology (Non-medical)

GO

Show Summary Details

Preview

A complete general unknown screening procedure was developed using liquid chromatography-mass spectrometry (LC-MS), a coupling that can increase the range of compounds amenable to MS. Sample preparation was by solid-phase extraction on a mixed-mode support in parallel with serum deproteination in order to recover the most hydrophilic compounds. Chromatography employed a reversed-phase narrow-bore column (150 × 1-mm i.d.) and a 50-min gradient elution at low flow-rate (50 µL/min), compatible with the electrospray source used without splitting nor heating. The single quadrupole LC-MS instrument used was operated in the 100 to 1100 u mass range in both the positive and negative modes, with two different, alternated collision-induced dissociation voltages in the source, in order to obtain the molecular or pseudo-molecular ions as well as fragments for the compounds analyzed. The addition of spectra obtained at low and high fragmentation voltages gave reconstructed spectra for each polarity, representing library entries. Finally, a program was created in order to detect the peaks of interest in the chromatographic noise using a very efficient signal processing algorithm, compute their relative retention time with respect to the internal standard (glafenine), draw their reconstructed spectra, search them in the libraries, and edit a report.

Journal Article.  0 words. 

Subjects: Medical Toxicology ; Toxicology (Non-medical)

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.