With the addition of Benzene in petrol, in place of a lead compound, Benzene and its derivatives are now an integral part of vehicular pollution and have become a matter of concern. Unfortunately a majority of these compounds are highly toxic and many have been reported to be carcinogenic. Organic compounds are also reported to be pre-cursers for Ozone formation and play a role in secondary formation of oxidants. As such air pollution monitoring networks are now beginning intensive efforts for monitoring of specific organic compounds such as Benzene, Toluene & Xylene and often a mixture of Total Non Methane Hydrocarbons.
The APM 856 Organic Vapour Sampler meets all important requirements for field measurements of gaseous organic pollutants in ambient air. It collects samples of organic compounds by adsorbing them on an activated charcoal column. The organics are then desorbed and analyzed via a gas chromatograph to estimate the actual concentration in ambient air.
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