Automatic on-line monitoring of atmospheric volatile organic compounds: Gas chromatography–mass spectrometry and gas chromatography–flame ionization detection as complementary systems

Blas, Maite de; Navazo, Marino; Alonso, Lucio; Durana, Nieves; Iza, J.

doi:10.1016/j.scitotenv.2011.08.072

Cited by 43 publications

(20 citation statements)

References 36 publications

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“…The method of cryofocusing-thermodesorption is a common technique 5266 F. Obersteiner et al: A versatile, refrigerant-and cryogen-free cryofocusing-thermodesorption unit for that purpose (e.g. Aragón et al, 2000;Demeestere et al, 2007;Dettmer and Engewald, 2003;Eyer et al, 2016;Hou et al, 2006). In principal, an ambient air sample from either a sample flask or continuous flow for online measurement is preconcentrated on adsorptive material at a specific adsorption temperature, T A .…”

Section: Introductionmentioning

confidence: 99%

A versatile, refrigerant- and cryogen-free cryofocusing–thermodesorption unit for preconcentration of traces gases in air

Obersteiner

Bönisch²,

Keber

et al. 2016

Atmos. Meas. Tech.

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We present a compact and versatile cryofocusingthermodesorption unit, which we developed for quantitative analysis of halogenated trace gases in ambient air. Possible applications include aircraft-based in situ measurements, in situ monitoring and laboratory operation for the analysis of flask samples. Analytes are trapped on adsorptive material cooled by a Stirling cooler to low temperatures (e.g. −80 • C) and subsequently desorbed by rapid heating of the adsorptive material (e.g. +200 • C). The set-up involves neither the exchange of adsorption tubes nor any further condensation or refocusing steps. No moving parts are used that would require vacuum insulation. This allows for a simple and robust design. Reliable operation is ensured by the Stirling cooler, which neither contains a liquid refrigerant nor requires refilling a cryogen. At the same time, it allows for significantly lower adsorption temperatures compared to commonly used Peltier elements. We use gas chromatography -mass spectrometry (GC-MS) for separation and detection of the preconcentrated analytes after splitless injection. A substance boiling point range of approximately −80 to +150 • C and a substance mixing ratio range of less than 1 ppt (pmol mol −1 ) to more than 500 ppt in preconcentrated sample volumes of 0.1 to 10 L of ambient air is covered, depending on the application and its analytical demands. We present the instrumental design of the preconcentration unit and demonstrate capabilities and performance through the examination of analyte breakthrough during adsorption, repeatability of desorption and analyte residues in blank tests. Examples of application are taken from the analysis of flask samples collected at Mace Head Atmospheric Research Station in Ireland using our laboratory GC-MS instruments and by data obtained during a research flight with our in situ aircraft instrument GhOST-MS (Gas chromatograph for the Observation of Tracerscoupled with a Mass Spectrometer).

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Section: Introductionmentioning

confidence: 99%

A versatile, refrigerant- and cryogen-free cryofocusing–thermodesorption unit for preconcentration of traces gases in air

Obersteiner

Bönisch²,

Keber

et al. 2016

Atmos. Meas. Tech.

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“…It has been found that Tenax TA retains quantitatively, without showing significant breakthrough, VOCs with boiling points above 100°C . Carbograph 1TD is a hydrophobic, medium strength sorbent and is commonly used in the analysis of different VOC groups, such as a wide range of aromatic compounds and chlorinated compounds .…”

Section: Resultsmentioning

confidence: 99%

Development of a method for the monitoring of odor-causing compounds in atmospheres surrounding wastewater treatment plants

et al. 2013

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This study describes the development of an analytical method based on active collection in a multisorbent Tenax TA/Carbograph 1TD tube, followed by thermal desorption and GC-MS for the determination of 16 volatile organic compounds in air samples. The analyzed compounds include ozone precursors and odor-causing compounds belonging to different chemical families (sulfur- and nitrogen-containing compounds, aldehydes, and terpenes). Two types of sorbents were tested and desorption conditions (temperature, time, and sampling, and desorption flow) were evaluated. External calibration was carried out using the multisorbent bed. Method detection limits in the range 0.2-2.0 μg m(-3) for 1 L samples were obtained. The method was applied for determining the target compounds in air samples from two different wastewater treatment plants. Most compounds were detected and toluene, limonene, and nonanal were found in particularly high concentrations with maximum values of 438, 233, and 382 μg m(-3), respectively.

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“…They can cause drowsiness, headache, dizziness and cancer for long-term inhalation or exposure [24][25][26][27]. Consequently, a colloidal crystal-based colorimetric chemical sensor was developed by Endo et al to specifically determine VOC concentrations [28].…”

Section: Sensing Of Volatile Organic Compoundsmentioning

confidence: 99%

Responsive photonic crystal for the sensing of environmental pollutants

Wang

Meng

Xue

et al. 2014

Trends in Environmental Analytical Chemistry

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Automatic on-line monitoring of atmospheric volatile organic compounds: Gas chromatography–mass spectrometry and gas chromatography–flame ionization detection as complementary systems

Cited by 43 publications

References 36 publications

A versatile, refrigerant- and cryogen-free cryofocusing–thermodesorption unit for preconcentration of traces gases in air

A versatile, refrigerant- and cryogen-free cryofocusing–thermodesorption unit for preconcentration of traces gases in air

Development of a method for the monitoring of odor-causing compounds in atmospheres surrounding wastewater treatment plants

Responsive photonic crystal for the sensing of environmental pollutants

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