Patent ID: 7189977

Claim:
An electrospray mass spectrometer fitted with an electrospray ion source, said ion source comprising a structure supporting a nebulization nozzle, a sampling orifice, a heated desolvation chamber and a control knob supporting a support rod, said nebulizing nozzle having an axis and said sampling orifice having an axis, the axis of the nebulization nozzle intersecting the axis of the sampling orifice, said electrospray ion source further comprising a movable desolvation chamber having a direction-changing channel and being supported from said support rod such that the movable desolvation chamber can be moved off the axis of the nebulization nozzle in an electrospray ionization mode and set on the axis of the nebulization nozzle in a cold-spray ionization mode wherein liquid droplets are introduced from an opening from the nebulization nozzle and pass through the direction-changing channel such that sample ions are discharged from an exit opposite to the sampling orifice.