A new passive sampling system for monitoring SO2 in the atmosphere

✍ Scribed by Hongmao Tang; Bernie Brassard; Ray Brassard; Eric Peake

• Publisher: John Wiley and Sons
• Year: 1997
• Weight: 125 KB
• Volume: 1
• Category: Article
• ISSN: 1086-900X
• DOI: 10.1002/(sici)1520-6521(1997)1:5<307::aid-fact6>3.0.co;2-q

✦ Synopsis

A new all-season passive sampling system for monitoring SO 2 in the atmosphere has been developed in the laboratory and validated in the field. The unique features for this new system include a newly designed passive sampler and a rain shelter, which allows the passive sampler to be installed in the field facing downwards. An equation associated with meteorological parameters is used to calculate the passive sampling rates. This system has been extensively tested in the lab (temperature from Ϫ37 to 32 ؇C, relative humidity from 20 to 95%, and wind speed from 0.5 to ) and validated 150 cm/s in the field in all seasons' climates. The accuracy of the SO 2 concentrations in the atmosphere obtained with the use of the new passive sampling system was higher than 85% compared to those obtained with the use of continuous SO 2 analyzers. Based on 1-month exposure, the new passive sampling system can monitor SO 2 concentrations in the atmosphere ranging from 0.1 to 120 ppb.