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- W2525097187 abstract "In 1993 a follow-up study was conducted to the 1991 trials by the National Park Service of passive samplers for integrated measurement of ozone. A preliminary factorial design study was used to verify consistency between samplers and between analysis laboratories. It was found that the significant differences in measured ozone were being introduced by the polypropylene rain shields that were used in the 1991 trials. PVC plastic rainshields were used subsequently. For the main part of the 1993 study, five sites in two different national parks were used to compare passive sampler ozone measurements to average hourly exposures determined with UV-photometric ozone analyzers. Passive sampler measurements agreed well for each site and were within {+-}10% accuracy for each measurement period. The overall collection factor varied somewhat by site (21.565 {+-} 1.59 cm{sup 3}/min), generally met the criteria established prior to the study and appear to be suitable for field use to measure ambient ozone when used as part of a well designed ozone measurement program." @default.
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- W2525097187 date "1994-12-31" @default.
- W2525097187 modified "2023-09-27" @default.
- W2525097187 title "Evaluation of passive samplers for field measurements of ambient ozone in the national parks" @default.
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