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Nitrogen dioxide (NO2) occupational exposure assessment on Rio de Janeiro's city traffic wards

In order to assess level of human exposure to nitrogen dioxide, 22 traffic police from the city of Rio de Janeiro were monitored during their working hours for 3 consecutive days. Samples were taken by using a passive sampler (badge) and analyzed spectrophotometrically after reacting with sulphanilic acid followed by coupling with N-naphtilethylenediamine dihydrochloride. Results ranged from 13.3 to 193.6 mg/m³. According to the literature, these levels are not associated with any acute damage to human health but care should be taken to avoid long-term problems.

Nitrogen Dioxide; Environmental Exposure; Occupational Exposure; Passive Sampling


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