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Related Experiment Videos

A microscale device for measuring emissions from materials for indoor use.

T Schripp1, B Nachtwey, J Toelke

  • 1Fraunhofer Wilhelm-Klauditz-Institute (WKI), Material Analysis and Indoor Chemistry, Bienroder Weg 54E, 38108 Braunschweig, Germany.

Analytical and Bioanalytical Chemistry
|January 17, 2007
PubMed
Summary

The Microchamber/Thermal Extractor (mu-CTE) offers rapid screening of volatile organic compound (VOC) emissions from car trim, correlating well with conventional methods, especially at ambient temperatures.

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Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Materials Science

Background:

  • Emission test chambers are standard for assessing organic vapor emissions from construction products.
  • Polymeric car trim emissions are typically analyzed using direct thermal desorption/extraction.
  • The Microchamber/Thermal Extractor (mu-CTE) was developed for rapid VOC screening and thermal extraction of larger samples.

Purpose of the Study:

  • To evaluate the correlation between the mu-CTE and conventional emission test methods.
  • To assess the mu-CTE's suitability for rapid screening and quality control of car trim emissions.
  • To investigate the influence of experimental conditions on data correlation.

Main Methods:

  • Experiments were conducted using the mu-CTE under varying temperatures, air change rates, and sample conditioning times.

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  • Quantitative and qualitative correlations were analyzed between mu-CTE data and conventional chamber tests.
  • Computational fluid dynamics (CFD) modeling was used to analyze airflow within the microchamber.

    • Main Results:

    • Good quantitative and qualitative correlation was achieved at ambient temperatures, even with minimal sample conditioning.
    • Elevated temperature correlations were influenced by sample mass and conditioning time.
    • The mu-CTE demonstrated reproducible emissions data despite its small sample capacity.
    • CFD modeling indicated turbulent flow, but experimental data showed enhanced recovery of semivolatile components.

    Conclusions:

    • The mu-CTE provides a reliable and rapid method for assessing VOC emissions from car trim, correlating well with conventional methods.
    • Ambient temperature measurements using the mu-CTE are a reliable indicator of long-term emission performance.
    • The microchamber's design effectively facilitates the recovery of semivolatile compounds, overcoming potential sink effects.