This construction also allows {HEAD ~ the use} of {TAIL ~ filters} to remove particulates before the sample reaches the chromatographic medium 
of
This construction also allows { HEAD ~ the use } of { TAIL ~ filters } to remove particulates before the sample reaches the chromatographic medium
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH