简介:Volatile (vapor-phase) organic air toxics or Hazardous Air Pollutants (HAPs)
are monitored in many industrial and urban environments as a measure of air
quality. They range in volatility from methyl chloride to hexachl简介:Volatile (vapor-phase) organic air toxics or Hazardous Air Pollutants (HAPs)
are monitored in many industrial and urban environments as a measure of air
quality. They range in volatility from methyl chloride to hexachlorobutadiene and
trichlorobenzenes, and include polar as well as nonpolar compounds. Several
national and international standard methods have been developed for air toxics
and related applications including US EPA Method TO-17 (Determination of volatile
organic compounds in ambient air using active sampling onto sorbent tubes).
In response to increasing demand for ambient air toxics measurement, cryogen?free
thermal desorber (TD) technologies have been developed, presenting an automated,
method?compliant analytical platform for both tubes and canisters (for US EPA
Method TO-15, see TDTS 81). The latest systems typically feature innovations such
as repeat analysis for tubes, together with internal standard addition options for
both canister and tube operation.详细>