One drop chemical derivatization--DESI-MS analysis for metabolite structure identification

Journal of Mass Spectrometry : JMS
Arnaud LubinFilip Cuyckens

Abstract

Structural elucidation of metabolites is an important part during the discovery and development process of new pharmaceutical drugs. Liquid Chromatography (LC) in combination with Mass Spectrometry (MS) is usually the technique of choice for structural identification but cannot always provide precise structural identification of the studied metabolite (e.g. site of hydroxylation and site of glucuronidation). In order to identify those metabolites, different approaches are used combined with MS data including nuclear magnetic resonance, hydrogen/deuterium exchange and chemical derivatization followed by LC-MS. Those techniques are often time-consuming and/or require extra sample pre-treatment. In this paper, a fast and easy to set up tool using desorption electrospray ionization-MS for metabolite identification is presented. In the developed method, analytes in solution are simply dried on a glass plate with printed Teflon spots and then a single drop of derivatization mixture is added. Once the spot is dried, the derivatized compound is analyzed. Six classic chemical derivatizations were adjusted to work as a one drop reaction and applied on a list of compounds with relevant functional groups. Subsequently, two successive react...Continue Reading

References

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Citations

Jun 1, 2018·Journal of Analytical Methods in Chemistry·Federica BianchiMaria Careri
Jan 21, 2017·Analytical Chemistry·Patricia M PeacockSarah Trimpin

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