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Trace analysis of pentachlorophenol (PCP) in wood and wood-based products

Comparison of sample preparation procedures
: Buhr, A.; Genning, C.; Salthammer, T.


Fresenius Journal of Analytical Chemistry 367 (2000), pp.73-78
ISSN: 0937-0633
Journal Article
Fraunhofer WKI ()

The main problem with routine analysis of pentachlorphenol (PCP) and sodium pentachlorophenolate (Na-PCP) in wood and wood-based products is to determine critical PCP-contents. This task requires a reliable analytical method and statistical testing. An analytical procedure is described, which permits the determination of PCP and Na-PCP with sufficient sensitivity and accuracy. A medium size sieve (4 x 4 mm quadratic mesh) was found suitable for the grinding step. Different extraction techniques and solvents were tested systematically. Extraction by a combination of ultrasonication and shaking in the solvent mixture toluene/sulfuric acid showed best recoveries. The eluted PCP and Na-PCP were derivatized with acetic anhydride and determined by GC/ECD. The limits of detection and determination were 0.14 mg/kg and 0.40 mg/kg, respectively.