Screening of pentachlorophenol-contaminated wood by thermodesorption sampling and photoacoustic detection

Harald A. Beck, Zoltan Bozóki, Reinhard Niessner

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Abstract

The still-remaining high amounts of pentachlorophenol (PCP), used as wood preservative, in buildings and in waste wood are a potential risk for humans and the environment. To ensure a fast and selective measurement of PCP, a screening tool was developed, which is not only sensitive, but, unlike conventional methods, it requires no added chemicals, is simple, cost-effective, mobile, and capable of on-site operation. The instrument combines light-induced thermodesorption sampling followed by an external cavity diode laser based photoacoustic detector. Measurements on wood samples proved that the system can determine PCP to as low as a concentration of 10 μg/ cm2 within minutes without destruction of the sample. The system was calibrated with reference to the concentration of PCP impregnated on the wood surface. It is demonstrated that measurements are not influenced by moisture content of the wood samples.

Original languageEnglish
Pages (from-to)2171-2176
Number of pages6
JournalAnalytical Chemistry
Volume72
Issue number9
DOIs
Publication statusPublished - May 1 2000

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ASJC Scopus subject areas

  • Analytical Chemistry

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