On-line monitoring method of persistent organic pollutants in gas phase

摘要

There are many persistent organic pollutants (POPs) in organic halogenated compounds. Especially in polychlorinated biphenyls (PCBs), pollution of the surrounding environment must be strictly prevented, giving a strong imperative for the development of real-time measurement technology for PCBs concentration monitoring. In this report, laser Ionization/dynamic trapping/time of flight mass spectrometry was carried out on gaseous PCBs. A detecting sensitivity of 0.01 mg/m{sup}3N, equivalent to 1/10 of the limit specified by regulatory requirements, was achieved.