A diffusive sampler comprises {HEAD ~ a housing} with an opening and containing a sorbent, preferably having {TAIL ~ a barrier} between the sorbent and the opening to prevent convection currents but still allowing the exchange of the analyte and the sorbate by diffusion, and at least one sorbate carried by the sorbent 
having
A diffusive sampler comprises { HEAD ~ a housing } with an opening and containing a sorbent , preferably having { TAIL ~ a barrier } between the sorbent and the opening to prevent convection currents but still allowing the exchange of the analyte and the sorbate by diffusion , and at least one sorbate carried by the sorbent
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH