Design and Performance of a Dual-Polarity Instrument for Ion Soft Landing.A new apparatus for ion soft landing research was developed and is reported in this contribution.  The instrument includes a dual polarity high-flux electrospray ionization (ESI) interface, a tandem electrodynamic ion funnel system, a collisional flatapole, a quadrupole mass filter, and a focusing lens. 
ESI
The instrument includes a dual polarity high-flux electrospray ionization (ESI) interface, a tandem electrodynamic ion funnel system, a collisional flatapole, a quadrupole mass filter, and a focusing lens. 
tandem electrodynamic ion funnel system
The instrument includes a dual polarity high-flux electrospray ionization (ESI) interface, a tandem electrodynamic ion funnel system, a collisional flatapole, a quadrupole mass filter, and a focusing lens. 
collisional flatapole
The instrument includes a dual polarity high-flux electrospray ionization (ESI) interface, a tandem electrodynamic ion funnel system, a collisional flatapole, a quadrupole mass filter, and a focusing lens. 
quadrupole mass filter
The instrument includes a dual polarity high-flux electrospray ionization (ESI) interface, a tandem electrodynamic ion funnel system, a collisional flatapole, a quadrupole mass filter, and a focusing lens. 
focusing lens