||Assessing the Performance of Ambient Air Samplers for Volatile Organic Compounds.
Crist, H. L. ;
||Environmental Monitoring Systems Lab., Research Triangle Park, NC. Quality Assurance Div.
Performance evaluation ;
Gas analysis ;
Air pollution ;
Volatile organic compounds ;
Air samplers ;
Air pollution monitors ;
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Performance audit results of two different ambient air monitoring projects for volatile organic compounds (VOC's) are presented. An NBS traceable gas cylinder containing several VOC's in dry nitrogen at parts per billion (ppb) concentration levels was used at the field sampling site to evaluate performance of the sampling and analytical systems. Both Tenax cartridges and evacuated stainless steel canisters (6 litre) were used to sample the air. Sample media exposed to the audit gas were returned to the laboratory for analysis.