Analytische Chemie
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Charge separation in liquid droplets within a strong electric field leads to opposite directed progeny droplet jets. That phenomenon is called field induced droplet ionization (FIDI). The jets contain charged molecules, which enables a mass spectrometric analysis. Acoustic levitation of droplets has matured to a powerful tool for containerless sample handling in micro fluidic systems in order to suppress agglomeration and classic contamination pathways. Herein we present the combination of both: FIDI assisted By Ultra-Sound (FIDIBUS). Compared to FIDI, it felicitates a steady observation of a single droplet during its jet formation. Furthermore, it allows for using different shaped electrodes and a multiple droplet interrogation.