Ultra-soft Desorption Assisted Mass Spectrometry using Picosecond Infrared Laser for the Detection of Ions in the Liquid Surface
To identify the species in liquid sur-face using mass spectrometry,we must eliminate or reduce interfer-ences during the vaporization or des-orption of the species from the liq-uid surface.It is much more chal-lenging to isolate the ionic,larger species from the liquid surface,be-cause of the frangible structures and the higher solvation energies of those species.Here we demonstrate a new mass spectrometry in which the ionic species at the liquid surface can be desorbed with ultra-soft infrared picosecond laser pulses while the liquid surface is not breached.This laser des-orption assisted mass spectrometry is not only a powerful tool to detect the fragile species but also promising to investigate vibrational energy transfer dynamics in the liquid surface.
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