{HEAD ~ Ions} within {TAIL ~ a window} of m/z of interest are extracted via a quadrupole mass filter 24 and passed to a linear trap 30 
within
{ HEAD ~ Ions } within { TAIL ~ a window } of m / z of interest are extracted via a quadrupole mass filter 24 and passed to a linear trap 30
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH