Abstract by Elaura Gustafson
Chemistry and Biochemistry
Electrospray ionization: mimicking Martian dust for charge detection mass spectrometry
Charge detection mass spectrometry (CDMS) is a single-ion technique where the m/z and charge are measured simultaneously as charged particles pass a sensing electrode array. A linear detector array for CDMS is being developed for analysis of atmospheric Martian dust. Atmospheric dust grains on Mars likely carry a large electrical charge, so an electrospray ionization source is used to mimic this charge. Electrospray ionization (ESI) is a soft ionization technique that is useful to produce charged particles for CDMS. In ESI charged particles are transferred from solution to the gas phase. For adequate charge and mass measurements in CDMS electrosprayed particles need to be completely desolvated and retain as many charges as possible. This presentation will discuss the implementation of an ESI source on a home-built CDMS instrument, the challenges and solutions in acquiring useable data for the given application.