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Microbial volatile organic compounds in moldy interiors: a long-term climate chamber study
Sven Schuchardt1, Andrea Strube
1Institute of Toxicology and Pharmacology for Natural Scientists, University Medical School Schleswig-Holstein, Campus Kiel, Kiel, Germany. sven.schuchardt@item.fraunhofer.de
Journal of Basic Microbiology
|August 24, 2012
Summary
Air sampling for microbial volatile organic compounds (MVOCs) is inefficient for detecting indoor mold. Even under ideal conditions, low MVOC concentrations are difficult to detect and may not reliably indicate mold growth.
Area of Science:
- Environmental Science
- Microbiology
- Analytical Chemistry
Background:
- Indoor mold growth is a common issue linked to health problems.
- Microbial volatile organic compounds (MVOCs) are potential indicators of indoor mold.
- Current methods for detecting MVOCs may have limitations in real-world scenarios.
Purpose of the Study:
- To evaluate the effectiveness of air sampling for detecting MVOCs emitted from simulated indoor mold growth.
- To determine if MVOCs can serve as reliable indicators of mold presence and extent in indoor environments.
Main Methods:
- A climate chamber (40 m³ volume) was used to simulate indoor mold growth on damaged wallpaper.
- The chamber was inoculated with 14 fungal strains and maintained under typical indoor ventilation conditions.
- Air samples were collected daily for 105 days and analyzed for MVOCs using gas chromatography/mass spectrometry (GC-MS).
Main Results:
- Only nine MVOCs were detected over the 105-day sampling period.
- Detected MVOC concentrations were generally very low, even under simulated high mold growth conditions.
- Most detected MVOCs were not considered reliable indicators of mold growth in indoor settings.
Conclusions:
- Standard air sampling methods may struggle to detect low concentrations of MVOCs emitted by indoor mold.
- The reliability of commonly detected MVOCs as indicators for indoor mold growth is questionable.
- Further research is needed to develop more sensitive and specific methods for detecting indoor mold via airborne compounds.
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