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Taking advantage of the electrochemical aspects of electrospray ionization (ESI) sources in positive ionization mode mass spectrometry (MS), aqueous copper complexes are electrogenerated using sacrificial copper electrodes. When using 8-hydroxyquinoline or batho-cuproine, two chelating agents for Cu2+ and Cu+ ions, respectively, the electrodissolution of copper leads to the formation of the respective complexes that are then analyzed by MS. This electrochemical generation of copper(I) complexes offers a direct route to synthesize Cu+ complexes in aqueous solutions.
Andrea Baccarini, Imad El Haddad, Mihnea Surdu, Houssni Lamkaddam
Anders Meibom, Stéphane Laurent Escrig, Florent Olivier Vivien Plane, Lukas Baumgartner, Thomas Bovay