Comparison of Active and Passive Measurement of Ozone in Zagreb Air

Pehnec, Gordana; Vadjić, Vladimira; Hršak, Janko

doi:10.1007/s00128-002-0197-0

Cited by 6 publications

(12 citation statements)

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“…Passive samplers did not meet the demands for precision and detection limit required by 24-h averages (Pehnec et al, 2003). Table III shows the results for the period July 19-August 20.…”

Section: Resultsmentioning

confidence: 99%

“…Methods of active and passive sampling based on nitrite ion as a reagent (Koutrakis et al, 1993;Smith and Zhou, 1997) were used for getting 24-h averages and 7-day averages. Both methods were tested and calibrated according to the automatic device (Pehnec et al, 2003). All three types of samplers were used simultaneously for comparison at measurement site in the northern part of Zagreb.…”

Section: Methodsmentioning

confidence: 99%

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Measurements of Ozone Concentrations in Zagreb

Pehnec

Vadjić

Hršak

2005

Environ Monit Assess

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Ozone concentrations were measured in Zagreb at four sites from May 1999 to April 2001 in order to categorize the air quality with respect to ozone. In the summer of 2000, the ozone measurements were also extended to four sites in the suburbs of Zagreb. Methods of active and passive sampling with nitrite ion as a reagent were used. In the northern part of the town ozone was analyzed by an automatic device. Automatic device measurements in the years 1999 and 2000 showed that hourly averages of ozone concentrations did not exceed the Croatian recommended value of the 98th percentile (180 micro/g m(-3)). Over the two-year period, 24-h averages occasionally exceed 110 microg m(-3) in city center and in the northern part of the town. Regardless of these isolated examples, ozone was well within acceptable concentrations. Ozone concentrations measured in summer 2000 were higher in the suburbs of Zagreb than in the city. The 98th percentile values higher than 110 microg m(-3) were recorded at three sites.

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“…Passive samplers did not meet the demands for precision and detection limit required by 24-h averages (Pehnec et al, 2003). Table III shows the results for the period July 19-August 20.…”

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Measurements of Ozone Concentrations in Zagreb

Pehnec

Vadjić

Hršak

2005

Environ Monit Assess

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“…The average recovery of the sampler was 95% (standard deviation, 5%), accuracy was below 10%, and detection limit was 2.0 ppb. The passive sampler for ozone was also modified Pehnec's method (Pehnec and Hršak 2003) and consisted of three rings and a wind screen. Nitrate is formed from the reaction of nitrite ion and ozone.…”

Section: Methodsmentioning

confidence: 99%

“…The nitrate ion was analyzed using a ion chromatograph. Anions were separated on an analytical column and a guard column, with 3.5 mM Na 2 CO 3 /1.0 mM NaHCO 3 mixture as an eluent, and their concentrations were monitored using a conductivity detector (Pehnec and Hršak 2003;Zhou and Smith 1997). The ozone concentration was calculated from the nitrate concentration.…”

Section: Methodsmentioning

confidence: 99%

Indoor Air Distribution of Nitrogen Dioxide and Ozone in Urban Hospitals

Chen

Chuang

Lin

2009

Bull Environ Contam Toxicol

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“…Ozone concentrations were determined using the method first described by Koutrakis et al 32 that was modified into an active sampling method by Pehnec et al 33 Samples were collected every hour by sucking the air in glass impingers. The impingers were filled with the absorption solution containing NaNO 2 .…”

Section: Air Pollution Measurements and Meteorological Measurementsmentioning

confidence: 99%

Effect of Summer Ozone Concentrations on the Lung Function of Walkers in the Medvednica Mountain Nature Park, Croatia

Pehnec

Jazbec²,

Vađić

et al. 2011

Archives of Environmental & Occupational Health

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The study examines the influence of naturally elevated ozone concentrations and some meteorological variables on the lung function of untrained volunteers walking in an unpolluted mountain area. Forty male participants between 18 and 70 years (smokers and nonsmokers) walked at the top of Medvednica Mountain near Zagreb, Croatia, at approximately 1000 m above sea level (a.s.l.) and engaged in other recreational activities for at least 1 hour. Forced vital capacity (FVC) and forced expiratory volume in 1 second (FEV(1)) of the participants were measured at arrival and before they left the mountain. Regression analysis showed a statistically significant influence of environmental variables on lung function tests. However, all variables together explained less than 35% variability of FVC and 41% variability of FEV(1). The results suggest that short-term exposure to ozone may affect lung function tests, but no more than temperature and humidity. FEV(1) was found to be more sensitive to ozone than FVC. Smoking habit also had an important role in subject's sensitivity to ozone.

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Comparison of Active and Passive Measurement of Ozone in Zagreb Air

Cited by 6 publications

References 0 publications

Measurements of Ozone Concentrations in Zagreb

Measurements of Ozone Concentrations in Zagreb

Indoor Air Distribution of Nitrogen Dioxide and Ozone in Urban Hospitals

Effect of Summer Ozone Concentrations on the Lung Function of Walkers in the Medvednica Mountain Nature Park, Croatia

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