监测环境空气中“空气有毒物”的EPATO-17方法

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.