Figure 12From: Resolution enhancement of field asymmetric waveform ion mobility spectrometry (FAIMS) by ion focusing Spectrum of acetone under different RF focus voltages when peak-to-peak asymmetric waveform RF voltage is 850 V: (A) no focus (B) 25 kHz 12 Vpp (C) 25 kHz 30 Vpp (D) 25 kHz 49 Vpp (E) 25 kHz 60 Vpp. Back to article page