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Setup for characterization of MOS gas sensors as GC detector.

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Title: Setup for characterization of MOS gas sensors as GC detector.
Authors: Brieger, Oliver1 (AUTHOR) o.brieger@lmt.uni-saarland.de, Bur, Christian1 (AUTHOR), Schütze, Andreas1 (AUTHOR), Sauerwald, Tilman2 (AUTHOR)
Source: Sensors & Actuators B: Chemical. Dec2025:Part 2, Vol. 444, pN.PAG-N.PAG. 1p.
Subjects: Gas chromatography, Gas detectors, Temperature effect, Volatile organic compounds, Sensitivity analysis, Flow simulations, Mass spectrometers
Abstract: This paper presents the development and characterization of a gas sensor characterization platform for gas chromatography (GC) systems. With fluidic modeling we can accurately calculate the flow ratio between two detectors at different outlet pressures – in the presented case a mass spectrometer (MS) at high vacuum and metal oxide semiconductor (MOS) detector at ambient pressure. We further validate the fluidic model through experimental testing with commercially available restrictions and a separation column. A volatile organic calibration mix (EPA 502/524) is used to characterize a commercially available MOS gas sensor as GC detector. The temperature-dependent behavior of MOS sensors is studied, and the overall performance is compared with a laboratory MS. The results show the potential for these sensors in various applications, highlighting the importance of characterizing and verifying system components to ensure reliable results. The study concludes by demonstrating that MOS sensors can be effectively used as GC detectors, with comparable sensitivity and retention times to the total ion current of a traditional MS, paving the way for more accessible and portable GC solutions. • The fluidic model of the presented setup predicts the outlet flow within an RMSE of less than 0,2 mL/min. • The accuracy of the model enables flow prediction in typical GC setups. • The model enables us to initiate countermeasures as well as the successful integration of new detectors. • Retention times of the MOS gas sensor as GC-detector fit markedly well compared to the total ion current of the MS. • We studied the impact of MOS gas sensor temperatures on sensitivity for > 60 substances in an indoor air reference sample. [ABSTRACT FROM AUTHOR]
Copyright of Sensors & Actuators B: Chemical is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 187562562
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Label: Title
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  Data: Setup for characterization of MOS gas sensors as GC detector.
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  Data: <searchLink fieldCode="AR" term="%22Brieger%2C+Oliver%22">Brieger, Oliver</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> o.brieger@lmt.uni-saarland.de</i><br /><searchLink fieldCode="AR" term="%22Bur%2C+Christian%22">Bur, Christian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Schütze%2C+Andreas%22">Schütze, Andreas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sauerwald%2C+Tilman%22">Sauerwald, Tilman</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Sensors+%26+Actuators+B%3A+Chemical%22">Sensors & Actuators B: Chemical</searchLink>. Dec2025:Part 2, Vol. 444, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Gas+chromatography%22">Gas chromatography</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+detectors%22">Gas detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+effect%22">Temperature effect</searchLink><br /><searchLink fieldCode="DE" term="%22Volatile+organic+compounds%22">Volatile organic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Sensitivity+analysis%22">Sensitivity analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Flow+simulations%22">Flow simulations</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+spectrometers%22">Mass spectrometers</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper presents the development and characterization of a gas sensor characterization platform for gas chromatography (GC) systems. With fluidic modeling we can accurately calculate the flow ratio between two detectors at different outlet pressures – in the presented case a mass spectrometer (MS) at high vacuum and metal oxide semiconductor (MOS) detector at ambient pressure. We further validate the fluidic model through experimental testing with commercially available restrictions and a separation column. A volatile organic calibration mix (EPA 502/524) is used to characterize a commercially available MOS gas sensor as GC detector. The temperature-dependent behavior of MOS sensors is studied, and the overall performance is compared with a laboratory MS. The results show the potential for these sensors in various applications, highlighting the importance of characterizing and verifying system components to ensure reliable results. The study concludes by demonstrating that MOS sensors can be effectively used as GC detectors, with comparable sensitivity and retention times to the total ion current of a traditional MS, paving the way for more accessible and portable GC solutions. • The fluidic model of the presented setup predicts the outlet flow within an RMSE of less than 0,2 mL/min. • The accuracy of the model enables flow prediction in typical GC setups. • The model enables us to initiate countermeasures as well as the successful integration of new detectors. • Retention times of the MOS gas sensor as GC-detector fit markedly well compared to the total ion current of the MS. • We studied the impact of MOS gas sensor temperatures on sensitivity for > 60 substances in an indoor air reference sample. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Sensors & Actuators B: Chemical is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.snb.2025.138396
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Gas detectors
        Type: general
      – SubjectFull: Temperature effect
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      – SubjectFull: Volatile organic compounds
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      – SubjectFull: Sensitivity analysis
        Type: general
      – SubjectFull: Flow simulations
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      – SubjectFull: Mass spectrometers
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      – TitleFull: Setup for characterization of MOS gas sensors as GC detector.
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            NameFull: Brieger, Oliver
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            NameFull: Bur, Christian
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            NameFull: Schütze, Andreas
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            – D: 15
              M: 12
              Text: Dec2025:Part 2
              Type: published
              Y: 2025
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