ABSTRACT

The remarkable flexibility of FAIMS capabilities highlighted in this book makes one wondering what further approaches to manipulation and identification of ions based on their nonlinear transport in gases may be devised. One technique already demonstrated in experiment (5.1) is a largely indiscriminate guidance and trapping (rather than separation) of ions by FAIMS mechanism, occurring in exceptionally curved gaps where focusing by inhomogeneous field becomes extreme. Thus far, that is the only known means to focus ions at ambient conditions where traditional MS approaches useful at reduced pressure fail.