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