Diffusive Sampling — A Review

Harper, Martin; Purnell, C. J.

doi:10.1202/0002-8894(1987)048<0214:dsar>2.0.co;2

Cited by 12 publications

(22 citation statements)

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“…Many authors have reported the effect of WSP to the sampling rates. Harper and Purnell [17] reported that a minimum WSP of 5-10 cm/s was required. Lewis et al [18] noticed a continuous increase of sampling rate from WSP of 0 to 100 cm/s.…”

Section: Effect Of Face Velocity (Wind Speed)mentioning

confidence: 99%

A New All-Season Passive Sampling System for Monitoring H₂S in Air

Tang

Sandeluk

Lin

et al. 2002

The Scientific World JOURNAL

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A new Maxxam All-Season Passive Sampling system for monitoring H2S in air has been developed. This passive sampling system employs the same approaches as the Maxxam All-Season Passive Sampling Systems for monitoring SO2, NO2, and O3 reported previously. This system has been extensively tested in the lab (temperature from -20 to 20°C, relative humidity from 30 to 84%, and wind speed from 0.5 to 150 cm/s) and validated in field studies. Comparing measurements obtained with the use of the new passive sampling system with equivalent measurement with the use of an active filter pack H2S sampler yielded an accuracy of greater than 85%. The new H2S passive sampling system can be used to measure ambient H2S concentrations ranging from 0.02 to 7 ppb based on a 1-month exposure period. There is no significant interference found from other sulfur compounds in air. This system has been used in many air monitoring projects.

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Section: Effect Of Face Velocity (Wind Speed)mentioning

confidence: 99%

A New All-Season Passive Sampling System for Monitoring H₂S in Air

Tang

Sandeluk

Lin

et al. 2002

The Scientific World JOURNAL

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“…These features make this kind of sampler suitable not only to monitor individual exposure, but also for application to environmental atmosphere, including remote areas, where generally there is no available electric power and other techniques cannot be used. 10,[26][27][28][29][30] On the other hand, these samplers show some disadvantages, as they do not provide instantaneous concentrations, are not commercially available for several atmospheric compounds, do not allow sampling rate to vary -thus hindering concentration or dilution during sampling -, and do not have suitable sensitivity when exposed for short periods. 28,29 However accuracy of passive samplers have been tested in comparison with active methods, and usually good agreement has been derived for average concentrations in measured periods.…”

Section: Introductionmentioning

confidence: 99%

Laboratory validation of a passive sampler for SO2 atmospheric monitoring

Cruz

Campos

Novaes

et al. 2005

J. Braz. Chem. Soc.

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“…However, statistical approaches have been proposed to estimate AOT40 values from passive sampling (Gerosa et al in press). Characteristics, advantages and disadvantages of passive samplers are discussed in several reviews (Harper & Purnell 1987;Krupa & Legge 2000). In the framework of the National Integrated Programme for Forest Ecosystem Monitoring (CONECOFOR), concentrations of O 3 and NO 2 were measured at 20 forest sites.…”

Section: Introductionmentioning

confidence: 99%

Ozone and nitrogen dioxide measurements in the framework of the National Integrated Programme for the Control of Forest Ecosystems (CONECOFOR)

Buffoni¹

2002

J Limnol

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Ozone (O3) concentrations were monitored using passive (diffusive) samplers at 20 permanent monitoring plots of the National Integrated Programme for Forest Ecosystem Monitoring (CONECOFOR) during late spring and summer from 1996 to 2000. Nitrogen dioxide (NO2) concentrations were measured at the same sites with passive samplers during the same months in 1999 and 2000. Measurement devices were placed at a short distance from the forest plots in areas with freely circulating air. The exposure period for O3 passive samplers was 1 week; NO2 samplers were exposed for 7 days in 1999 and 14 days in 2000. Mean O3 concentrations recorded by the passive samplers for the monitoring periods in individual years vary from 75.2 to 125.8 μg m-3, showing considerable differences between individual years and the geographical locations of the monitoring sites. Generally speaking O3 concentration levels are higher at the plots located in Central and Southern Italy. The highest mean weekly concentrations were recorded in Sicily with a maximum of 171 μg m-3. No correlation can be found between O3 levels and elevation if all the plots are considered, while a significant increase of O3 levels with elevation can be observed in the six plots located in the Alpine region. The correlation analysis of 5-year mean concentration data and plot latitude show a moderately close relationship. Mean weekly concentrations often exceed 65 μg m-3 as 24 h mean, one of the short term thresholds proposed for the protection of vegetation. Exceedances are recorded in all monitoring periods. At the permanent monitoring observation plot in Sicily this threshold was exceeded in all the years of the study. Mean weekly or fortnightly NO2 concentration levels are generally very low, with the exception of some plots influenced by nearby emissions or transport phenomena. NO2 probably exceeds the critical level for the protection of forest ecosystems at one plot only. No correlation was observed between NO2 and O3 concentration data

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Diffusive Sampling — A Review

Cited by 12 publications

References 0 publications

A New All-Season Passive Sampling System for Monitoring H₂S in Air

A New All-Season Passive Sampling System for Monitoring H₂S in Air

Laboratory validation of a passive sampler for SO2 atmospheric monitoring

Ozone and nitrogen dioxide measurements in the framework of the National Integrated Programme for the Control of Forest Ecosystems (CONECOFOR)

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Diffusive Sampling — A Review

Cited by 12 publications

References 0 publications

A New All-Season Passive Sampling System for Monitoring H2S in Air

A New All-Season Passive Sampling System for Monitoring H2S in Air

Laboratory validation of a passive sampler for SO2 atmospheric monitoring

Ozone and nitrogen dioxide measurements in the framework of the National Integrated Programme for the Control of Forest Ecosystems (CONECOFOR)

Contact Info

Product

Resources

About

A New All-Season Passive Sampling System for Monitoring H₂S in Air

A New All-Season Passive Sampling System for Monitoring H₂S in Air