The sensor 3, wherein the detection head further comprises {HEAD ~ second laser means} for heating {TAIL ~ the sample} to volatilize the sample 
for heating
The sensor 3 , wherein the detection head further comprises { HEAD ~ second laser means } for heating { TAIL ~ the sample } to volatilize the sample
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH