Uptake rate behavior of tube-type passive samplers for volatile organic compounds under controlled atmospheric conditions

Walgraeve, Christophe; Demeestere, Kristof; Dewulf, Jo; Huffel, Katrijn Van; Langenhove, Herman Van

doi:10.1016/j.atmosenv.2011.06.069

Cited by 31 publications

(11 citation statements)

References 44 publications

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“…Thus, the 7-day passive sampling efficiency can be calculated using the following empirical equation: Then the UR eff is calculated for a VOC by Equation (2). Equation (11) suggests that more volatile chemicals will have large loss during long-term passive sampling, which agreed with the literature [28,40,45].…”

Section: Effective Uptake Rates For Long-term Environmental Samplingsupporting

confidence: 79%

“…They also bypassed complex calculations involving other physicochemical properties, chemical-adsorbent interaction and adsorption isotherm. For example, terpenes, aromatics, acetates and alkanes displayed different UR change patterns with respect to exposure time [40]. The efficiency of passive samplers is strongly influenced by adsorption isotherms, such as Langmuir, Freundlich and Dubinin-Radushkevich isotherms [48].…”

Section: Discussionmentioning

confidence: 99%

“…This is particularly true when much lower UR eff values have been observed for more volatile compounds and on weak sorbents like Tenax during long-term sampling periods [40,41]. Similar to Equation (4), we propose that 7d-α be expressed as a linear function of BP:…”

Section: Modeling Long-term Effective Uptake Ratesmentioning

confidence: 99%

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Diffusive Uptake Rates of Volatile Organic Compounds on Standard ATD Tubes for Environmental and Workplace Applications

Jia

2017

Environments

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Passive sampling for airborne volatile organic compounds (VOCs) has gained popularity; however, diffusive uptake rates (URs) have been experimentally determined for only a small subset of VOCs. This study aims to develop empirical models that can interpolate effective URs (UR eff ) for a wide range of VOCs. The modelling was based on the standard automated thermal desorption (ATD) tubes packed with Tenax TA and targeted the sampling efficiency (α), defined as the ratio between the ideal UR (UR ideal ) and UR eff . Available experimentally determined URs were compiled from literature. Method detection limits were determined on a thermal desorption-gas chromatography/mass spectrometry (TD-GC/MS) system. The 8-h UR eff can be modeled with retention volumes or boiling points (BPs) and the biases were within ±20%. The α for 7-day UR eff can be estimated by the model: α = 0.3626 Ln(BP) − 1.2324. The 8-h and 7-day UR eff values were then compiled for 75 VOCs commonly encountered in the environmental and occupational settings. The TD analytical method showed high precision, linearity and sensitivity, suitable for measuring indoor and outdoor VOCs. The approach and data presented here are anticipated to ease passive monitoring of VOCs for the general users.

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Section: Effective Uptake Rates For Long-term Environmental Samplingsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

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Diffusive Uptake Rates of Volatile Organic Compounds on Standard ATD Tubes for Environmental and Workplace Applications

Jia

2017

Environments

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“…The ranking of sites according to VOC concentration corresponds well with the traffic volume, and other anthropogenic activities at respective sites. The values of BTEX at all the categories were lower than the values reported by Meena et al The lower values may be because of the diffusion based passive sampling methodology used for the adsorption of gases [42] [43]. However these values can be used for dose based study on human health (Epidemiological studies) [44].…”

Section: Residential Corridormentioning

confidence: 71%

Seasonal and Spatial Variation of BTEX in Ambient Air of Delhi

Singh¹,

Gaur²,

Shukla³

2016

JEP

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The present study aims to provide an indication of ambient levels of BTEX in the immediate vicinity of petrol filling stations in Delhi & other road side corridors of Delhi. In this study spatial and seasonal variation of BTEX has been measured at different locations in Delhi. For the measurement of VOCs, passive based diffusion methodology was adopted for the adsorption of BTEX over the activated charcoal. Four categories of sampling sites were chosen (residential, traffic junctions, road side corridors and petrol pumps). The result confirms that the aromatic concentrations in the ambient air of gas stations are appreciably higher than the average values in locations with high vehicular flux. The mean concentration of BTEX at all the locations was 0.622μg/m 3 , 0.361 μg/m 3 , 1.037 μg/m 3 and 0.122 μg/m 3. The average concentration of benzene was highest at petrol pump 3.5 μg/m 3 however at all other sampling sites it was in the range of 0.294 to 0.712 μg/m 3. The mean concentration value shows that the xylene concentration dominates more in Delhi as compared to benzene. The total average BTEX concentration at road side corridors was 0.594 μg•m −3 , at residential corridors was 0.262 μg•m −3 , at intersections it was 0.649 μg•m −3 and at petrol filling stations it was 1.457 μg•m −3. The concentration was in the order of petrol filling stations > intersections > road side corridors > residence. These data show the predominance of diesel driven vehicles in Delhi since xylene mainly comes from diesel exhausts. The influential VOC species in case of diesel engine exhaust are benzene, ethylbenzene, xylenes, propane, n-decane and undecane and in case of gasoline vehicle exhaust influential species are benzene, ethylbenzene, 1,2,4-methylbenzene, 1,3,5-methylbenzene, n-hexane and 2-methylhexane. So xylene is mainly coming from diesel exhaust since gasoline vehicle exhaust doesn't show this species.

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“…2011a and2011b;Gonzalez-Flesca and Frezier, 2005;Yılmaz Civan et.al. 2012;ASTM D 6196-03;Kumar and Viden, 2007) so it is necessary to experimentally determine uptake rates under application relevant conditions.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Passive Uptake Rates for Volatile Organic Compounds on Commercial Thermal Desorption Tubes and the Effect of Ozone on Sampling

Maddalena¹

2013

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Uptake rate behavior of tube-type passive samplers for volatile organic compounds under controlled atmospheric conditions

Cited by 31 publications

References 44 publications

Diffusive Uptake Rates of Volatile Organic Compounds on Standard ATD Tubes for Environmental and Workplace Applications

Diffusive Uptake Rates of Volatile Organic Compounds on Standard ATD Tubes for Environmental and Workplace Applications

Seasonal and Spatial Variation of BTEX in Ambient Air of Delhi

Measurement of Passive Uptake Rates for Volatile Organic Compounds on Commercial Thermal Desorption Tubes and the Effect of Ozone on Sampling

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