{HEAD ~ The ability} to rapidly detect {TAIL ~ a trace amount} of lead species on site is very desirable 
to rapidly detect
{ HEAD ~ The ability } to rapidly detect { TAIL ~ a trace amount } of lead species on site is very desirable
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH