More particularly, it relates to a procedure and materials for the preconcentration of analytes in {HEAD ~ order} to facilitate {TAIL ~ the analytic process} 
to facilitate
More particularly , it relates to a procedure and materials for the preconcentration of analytes in { HEAD ~ order } to facilitate { TAIL ~ the analytic process }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL