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Original Articles

Identification of unknown compounds from quadrupole GC-MS data using Cerno Bioscience MassWorks™

Pages 74-98 | Published online: 24 Apr 2014
 

Abstract

The MassWorksTM software package has been evaluated, in a forensic context, for use in conjunction with quadrupole GC-EI-MS data to identify unknown compounds. Methods were developed using this software to obtain the chemical formula for both molecular and fragment ions for three different dye molecules. These methods were then applied in a single-blind experiment to identify four unknown compounds. Mass accuracies well within 30 mDa were typical, and molecular formula candidate lists were developed without a reliance on complicated rule sets or manual formula assessments.

Résumé

Le logiciel MassWorks™ a été évalué, dans un contexte de science judiciaire, pour l’utiliser avec des données d’un GC-EI-MS avec quadrupôle afin d’identifier des composés inconnus. Des méthodes ont été développées avec ce logiciel afin d’obtenir la formule chimique de molécules et de fragments d’ions de trois différentes teintures. Ces méthodes ont ensuite été utilisées lors d’une expérience à l’aveugle pour identifier quatre composés inconnus. Des masses précises à moins de 30 mDa des substances de référence étaient typiques, et des listes candidates de formules moléculaires ont été développées sans avoir recours à des règles compliquées ou à des évaluations manuelles de formules.

Acknowledgement

The author would like to acknowledge the generous technical and editorial support offered throughout this study by Gene Basara and Mark Sandercock.

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