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Spectral and chemical analyses of mould development on Scots pine heartwood

Spektral- und chemische Analysen der Schimmelbildung auf Kiefernkernholz

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Abstract

Scots pine heartwood specimens were exposed to mould in controlled humid atmosphere (RH 95%, T =20 °C) and the responses of electrical impedance and Fourier transform infrared spectroscopy (EIS and FTIR) methods were studied. The concentration of methanol soluble heartwood extractives and the emission of volatile organic compounds (VOC) were determined from the parallel samples. Results show that the spectral responses and VOC emissions were related to the mould development. According to this study, VOC emissions might be used for discriminating mould susceptible and resistant samples. FTIR spectra showed that the relation of amide (1655 cm-1) and carbonyl peaks (1736 cm-1) was significantly affected by mould. In the EIS analyses, there also were electrical parameters, which were significantly affected by mould. In conclusion, both spectral methods hold potential for non-destructive mould detection and monitoring of mould development.

Zusammenfassung

Kiefernkernholzproben wurden im kontrollierten Feuchtklima (rLf 95%, T = 20 °C) Schimmel ausgesetzt und mittels elektrischer Impedanzspektroskopie (EIS) und Fourieranalyse (FTIR) untersucht. Die Konzentration an methanollöslichen Kernholzextraktstoffen und die Emission flüchtiger organischer Stoffe (VOC) wurden an Vergleichsproben bestimmt. Die Ergebnisse zeigten, dass die Banden der Spektralanalysen und die VOC-Emissionen von der Schimmelentwicklung abhingen. Gemäß dieser Studie können VOC-Emissionen für die Unterscheidung von schimmelanfälligen und resistenten Proben verwendet werden. FTIR-Spektren zeigten, dass das Verhältnis zwischen den Amid- (1655 cm-1) und Karbonyl-Peakhöhen (1735 cm-1) signifikant vom Schimmel beeinflusst wurde. Die EIS-Analysen zeigten, dass elektrische Parameter ebenfalls signifikant vom Schimmel beeinflusst wurden. Zusammenfassend kann gesagt werden, dass beide Verfahren eine Möglichkeit für die zerstörungsfreie Schimmelerkennung und Überwachung der Schimmelentwicklung bieten.

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Authors and Affiliations

  1. Department of Physics, University of Kuopio, P.O. Box 1627, 70211, Kuopio, Finland

    Markku Tiitta, Laura Tomppo & Reijo Lappalainen

  2. VTT, Materials and Building, P.O. Box 1000, 02044, VTT, Finland

    Helena Järnström, Mia Löija, Hanna Iitti, Leena Paajanen & Hannu Viitanen

  3. Vantaa Research Unit, The Finnish Forest Research Institute, P.O. Box 18, 01301, Vantaa, Finland

    Tapio Laakso & Pekka Saranpää

  4. Punkaharju Research Unit, The Finnish Forest Research Institute, Finlandiantie 18, 58450, Punkaharju, Finland

    Anni Harju & Martti Venäläinen

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  1. Markku Tiitta
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  2. Laura Tomppo
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Correspondence to Markku Tiitta.

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Tiitta, M., Tomppo, L., Järnström, H. et al. Spectral and chemical analyses of mould development on Scots pine heartwood . Eur. J. Wood Prod. 67, 151–158 (2009). https://doi.org/10.1007/s00107-008-0298-5

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  • DOI: https://doi.org/10.1007/s00107-008-0298-5

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