Prior to exposure, {TAIL ~ the sorbent} contains one or more sorbates that will desorb during {HEAD ~ exposure} 
Prior to exposure , { TAIL ~ the sorbent } contains one or more sorbates that will desorb during { HEAD ~ exposure }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD