Breakthrough characteristics of volatile organic compounds in the −10 to +170°C temperature range on Tenax TA determined by microtrap technology

Kroupa, Antonı́n; Dewulf, Jo; Langenhove, Herman Van; Víden, I.

doi:10.1016/j.chroma.2004.03.035

Cited by 27 publications

(21 citation statements)

References 32 publications

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“…Furthermore, the sorbent temperature could be set at −10°C during the extraction process thereby improving the breakthrough volume and increasing the extraction efciency for low-molecular-weight volatiles. 32,38) e average RSD value of all volatiles was 7% for DHS and 12% for HS-SPME. In addition, the average RSD for alcohols was 10% for DHS and 15% for HS-SPME.…”

Section: Comparison Of Headspace Micro Extraction Methodsmentioning

confidence: 99%

“…Furthermore, the sorbent temperature could be set at −10°C during the extraction process thereby improving the breakthrough point and increasing the extraction e ciency for low-molecularweight volatiles. 32) erefore, an e cient volatile pro ling system using DHS and high-pressure injection was developed. By applying these methods, sample losses from the split mode were reduced and various volatiles such as alcohols and low-molecular-weight volatiles could be detected.…”

Section: Comparison Of Headspace Micro Extraction Methodsmentioning

confidence: 99%

“…In addition, it is able to trap the sorbent with improved extraction e ciency for trace volatiles by combining techniques including cooling the sorbent and adding some salt to produce a salting out e ect. 31,32) e combination of these techniques would be expected to improve the sample volume loaded on the column and the sensitivity for the individual volatile components.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Component Profiling of Trace Volatiles in Blood by Gas Chromatography/Mass Spectrometry with Dynamic Headspace Extraction

et al. 2015

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A dynamic headspace extraction method (DHS) with high-pressure injection is described. is dynamic extraction method has superior sensitivity to solid phase micro extraction, SPME and is capable of extracting the entire gas phase by purging the headspace of a vial. Optimization of the DHS parameters resulted in a highly sensitive volatile pro ling system with the ability to detect various volatile components including alcohols at nanogram levels. e average LOD for a standard volatile mixture was 0.50 ng mL, and the average LOD for alcohols was 0.66 ng mL −1. is method was used for the analysis of volatile components from biological samples and compared with acute and chronic in ammation models. e method permitted the identi cation of volatiles with the same pro le pattern as in vitro oxidized lipid-derived volatiles. In addition, the concentration of alcohols and aldehydes from the acute in ammation model samples were signi cantly higher than that for the chronic in ammation model samples. e di erent pro les between these samples could also be identi ed by this method. Finally, it was possible to analyze alcohols and lowmolecular-weight volatiles that are di cult to analyze by SPME in high sensitivity and to show volatile proling based on multi-volatile simultaneous analysis.Please cite this article as: Mass Spectrom (Tokyo) 2015; 4(1): A0034

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Section: Comparison Of Headspace Micro Extraction Methodsmentioning

confidence: 99%

Section: Comparison Of Headspace Micro Extraction Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multi-Component Profiling of Trace Volatiles in Blood by Gas Chromatography/Mass Spectrometry with Dynamic Headspace Extraction

et al. 2015

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“…), amount of sorbent, sampling speed etc. (Cal, Rood, & Larson, 1996; Y. C. Chiang, P. C. Chiang, & Huang, 2001;Harper, 2000;Kroupa, Dewulf, Langenhove, & Viden, 2004). There are some criteria points that are suggested to be taken into account during the selection of sorbents: (1) breakthrough of the analytes has to be avoided.…”

Section: Sorbent Samplingmentioning

confidence: 99%

Volatile Organic Compounds: Sampling Methods and Their Worldwide Profile in Ambient Air

Kumar

Víden

2006

Environ Monit Assess

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The atmosphere is a particularly difficult analytical system because of the very low levels of substances to be analysed, sharp variations in pollutant levels with time and location, differences in wind, temperature and humidity. This makes the selection of an efficient sampling technique for air analysis a key step to reliable results. Generally, methods for volatile organic compounds sampling include collection of the whole air or preconcentration of samples on adsorbents. All the methods vary from each other according to the sampling technique, type of sorbent, method of extraction and identification technique. In this review paper we discuss various important aspects for sampling of volatile organic compounds by the widely used and advanced sampling methods. Characteristics of various adsorbents used for VOCs sampling are also described. Furthermore, this paper makes an effort to comprehensively review the concentration levels of volatile organic compounds along with the methodology used for analysis, in major cities of the world.

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“…In this study, the optimal adsorbent mass and adsorption temperature were determined on the basis of a Van't Hoff type equation, 29 that is, the logarithm of the breakthrough volume is inversely proportional to the reciprocal of the trapping temperature. Experimental breakthrough volume results are shown in Table 2.…”

Section: Optimization Of Adsorbent Mass and Trap Temperaturementioning

confidence: 99%

A cryogen-free refrigerating preconcentration device for the measurement of C2 to C4 hydrocarbons in ambient air

Peng

Wang

Shen

et al. 2011

Analyst

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A cryogen-free refrigerating preconcentration device for the enrichment of trace amounts of highly volatile organic compounds in the atmosphere prior to analysis has been designed and evaluated. The device consists of a microtrap housed in an insulated box, which is cooled by a conventional refrigeration unit. Experimental parameters, including adsorbent mass, trapping temperature, and thermal desorption temperature, were optimized. The on-line coupling of the device to a GC allows sufficient enrichment and separation of C2 to C4 hydrocarbons in less than 40 min without a second cryotrap. The target compounds analysis showed good linearity (correlation coefficients >0.99) and repeatability (relative standard deviation <5%). Detection limits for the 10 volatile organic compounds ranged from 14 ppt to 52 ppt, under the conditions of a 500 mL sampling volume and À10 C trapping temperature. Real air sample measurements were conducted at an urban site, and five VOCs including ethane, ethene, propane, propene and 1-butene were detected and quantified.

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Breakthrough characteristics of volatile organic compounds in the −10 to +170°C temperature range on Tenax TA determined by microtrap technology

Cited by 27 publications

References 32 publications

Multi-Component Profiling of Trace Volatiles in Blood by Gas Chromatography/Mass Spectrometry with Dynamic Headspace Extraction

Multi-Component Profiling of Trace Volatiles in Blood by Gas Chromatography/Mass Spectrometry with Dynamic Headspace Extraction

Volatile Organic Compounds: Sampling Methods and Their Worldwide Profile in Ambient Air

A cryogen-free refrigerating preconcentration device for the measurement of C2 to C4 hydrocarbons in ambient air

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