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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 methylchloride to hexachlorobutadiene & trichlorobenzenes and include some polar as well as apolar compounds. Several national and international standard methods have been developed for air toxics and related air monitoring applications.
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