Figure 15From: Resolution enhancement of field asymmetric waveform ion mobility spectrometry (FAIMS) by ion focusing Spectrum of acetone under different RF focus voltage frequencies when peak-to-peak asymmetric waveform RF voltage is 850 V: (A) no focus (B) 20 kHz 60 Vpp (C) 30 kHz 60 Vpp (D) 40 kHz 60 Vpp (E) 50 kHz 60 Vpp. Back to article page