Marta Managò, , , Chiara Salvitti, , , Anna Troiani, , , Alessia Di Noi, , , Andreina Ricci, , and , Federico Pepi*,
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Effect of pH on the Kinetics of Cysteine-to-Cystine Conversion in Thin Films Formed by ESI Microdroplet Deposition
The oxidation of cysteine to cystine was investigated in aqueous thin films generated by the deposition of electrospray ionization (ESI) microdroplets. The confined volume of the thin film promotes the reaction, resulting in up to 80% conversion of cysteine to cystine at a thin film temperature of 40 °C. The pH of the solution is a critical parameter, influencing both the yield and the kinetics of the reaction. Strong reaction acceleration factors in thin film with respect to the bulk were measured.
期刊介绍:
The Journal of the American Society for Mass Spectrometry presents research papers covering all aspects of mass spectrometry, incorporating coverage of fields of scientific inquiry in which mass spectrometry can play a role.
Comprehensive in scope, the journal publishes papers on both fundamentals and applications of mass spectrometry. Fundamental subjects include instrumentation principles, design, and demonstration, structures and chemical properties of gas-phase ions, studies of thermodynamic properties, ion spectroscopy, chemical kinetics, mechanisms of ionization, theories of ion fragmentation, cluster ions, and potential energy surfaces. In addition to full papers, the journal offers Communications, Application Notes, and Accounts and Perspectives