『Abstract
This work describes the evolution of NO2
and O3 levels from January to December of
2007, covering the four seasonal periods in the urban air of Ciudad
Real in the central-southern Spain. The measurements were carried
out by means of passive samplers (Radiello samplers). Eleven samples
were collected weekly, placed at different monitoring site locations.
The data indicate that the mean levels obtained during this period
for O3 and NO2 were
38.5±3.5 and 20.8±3.8 μg/m3, respectively. These measurements
were compared with other studies in Ciudad Real. Meteorological
conditions (temperature, pressure, humidity relative, wind speed
and direction) were also investigated.
Keywords: Passive sampling; NO2 and O3 levels; Urban and rural areas』
1. Introduction
2. Materials and methods. Experimental section
2.1. Area of study
2.2. Description of passive sampler employed
2.3. Extraction and analysis of the samples
2.3.1. Analysis of NO2 (R&P-Co 2001)
2.3.2. Analysis of O3 (R&P-Co 2001)
3. Results and discussion
3.1. Seasonal trend in levels of ozone and NO2
3.2. Relationship with climatologic variables
3.3. Average sampling values
3.4. Comparison of the obtained results with limit and threshold
environmental levels values
3.5. Comparison with the levels measured by DOAS in the 2000/2001
marketing year
4. Conclusions
Acknowledgments
References