Adsorbent materials commonly used in air analysis for adsorptive enrichment and thermal desorption of volatile organic compounds

Dettmer, Katja; Engewald, W.

doi:10.1007/s00216-002-1352-5

Cited by 249 publications

(180 citation statements)

References 74 publications

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“…Unfortunately, CMS are required for the quantitative adsorption of compounds that are more volatile than pentane and high polarity low-molecular-weight compounds [24,25]. The evaluation of a multibed trap without the presence of a CMS showed that some of the main components in breath samples (e.g., acetone, methanol, ethanol) cannot be adequately adsorbed when only graphitized carbons are present in the sorbent tube.…”

Section: Microtrap Evaluationmentioning

confidence: 99%

Capillary thermal desorption unit for near real-time analysis of VOCs at sub-trace levels. Application to the analysis of environmental air contamination and breath samples

Alonso¹,

Castellanos²,

Martín³

et al. 2009

Journal of Chromatography B

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Please cite this article as: M. Alonso, M. Castellanos, J. Martín, J.M. Sanchez, Capillary thermal desorption unit for near real-time analysis of VOCs at sub-trace levels. Application to the analysis of environmental air contamination and breath samples, Journal of Chromatography B (2008Chromatography B ( ), doi:10.1016Chromatography B ( /j.jchromb.2009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Page 1 of 32 A c c e p t e d M a n u s c r i p t 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

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Section: Microtrap Evaluationmentioning

confidence: 99%

Capillary thermal desorption unit for near real-time analysis of VOCs at sub-trace levels. Application to the analysis of environmental air contamination and breath samples

Alonso¹,

Castellanos²,

Martín³

et al. 2009

Journal of Chromatography B

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“…The multisorbent configuration is not necessary, as the later sorbent layers do not contact compounds. Tenax TA is the most common sorbent due to its high thermal stability, low inherent artifacts and degradation, hydrophobicity and accommodation for wide volatility [29,30]. It also allows efficient desorption and displays optimal GC performance when used as a chromatographic stationary phase.…”

Section: Standard Atd Tubesmentioning

confidence: 99%

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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“…This problem can be resolved by the application of multibed adsorption tubes, packed in order of increasing sorbent strength to cover diverse analytes over a broad range of volatility and polarity [15,16]. Although limited under ambient conditions, a comprehensive review of different adsorbents available for the adsorptive enrichment and thermal desorption in ambient air analysis has been studied by Dettmer and Engewald [17].…”

Section: Selection Of Sorbents For Ctmentioning

confidence: 99%

“…Carboxen 1000 (60/80 mesh, CMS with SSA l1200 m 2 /g) is one of the strongest adsorbents for collecting light VOCs (C 2 -C 5 ) [7]. The CT (III) was prepared with Tenax TA (60/80 mesh, porous organic polymers with SSA l35 m 2 /g) suitable for the collection of heavy VOCs (C 7 -C 26 ) [17]. In fact, Tenax TA has been recommended by the ECA-IAQ working group for the determination of total VOC concentration [11].…”

Section: Selection Of Sorbents For Ctmentioning

confidence: 99%

The effect of cold trap adsorbents on the gas chromatographic analysis of ambient VOCs under Peltier cooling conditions

Pal

Kim²

2008

J of Separation Science

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Original PaperThe effect of cold trap adsorbents on the gas chromatographic analysis of ambient VOCs under Peltier cooling conditionsIn this work, the relative analytical performance of the GC-based detection method was investigated with a major focus on cold trap (CT) adsorbent materials against four aromatic volatile organic compounds (VOCs) (e. g., benzene, toluene, xylene, and styrene). A series of calibration experiments were hence conducted under cryofocusing conditions formed by the Peltier cooling system in a thermal desorber (TD) unit. During the course of this study, comparative calibration datasets were acquired for each of the three CT types: (i) CT (I) = Carbopack B + Carbopack C, (ii) CT (II) = Carbopack B + Carboxen 1000, and (iii) CT (III) = Tenax TA. All calibration datasets were obtained under subambient temperature ( -108C) conditions controlled by the Peltier cooling system. The reliability of the calibration data was also assessed in an ancillary experiment with the aid of the modified injection through a thermal desorber (MITD) method. The results demonstrated that the GC detection properties of different VOCs were not altered significantly between different CT applications under Peltier conditions, although relative sensitivity could be distinguished moderately depending on the CT type.

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Adsorbent materials commonly used in air analysis for adsorptive enrichment and thermal desorption of volatile organic compounds

Cited by 249 publications

References 74 publications

Capillary thermal desorption unit for near real-time analysis of VOCs at sub-trace levels. Application to the analysis of environmental air contamination and breath samples

Capillary thermal desorption unit for near real-time analysis of VOCs at sub-trace levels. Application to the analysis of environmental air contamination and breath samples

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

The effect of cold trap adsorbents on the gas chromatographic analysis of ambient VOCs under Peltier cooling conditions

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