Trace analysis of pentachlorophenol (PCP) in wood and wood-based products--comparison of sample preparation procedures.
The main problem with routine analyses of pentachlorophenol (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.
Fraunhofer-Institut für Holzforschung, Wilhelm-Klauditz-Institut, Braunschweig, Germany.
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A
Buhr
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C
Genning
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T
Salthammer
D000089:Acetic Anhydrides; D002138:Calibration; D002849:Chromatography, Gas / Q000379:methods; D004785:Environmental Pollutants / Q000032:analysis*; D015386:Hazardous Substances / Q000032:analysis; D010416:Pentachlorophenol / Q000032:analysis*; D012680:Sensitivity and Specificity; D012997:Solvents; D013010:Sonication; D013464:Sulfuric Acids; D014050:Toluene; D014465:Ultrasonics; D014934:Wood
D000089:Acetic Anhydrides; D004785:Environmental Pollutants; D015386:Hazardous Substances; D012997:Solvents; D013464:Sulfuric Acids; C031800:acetic anhydride; D014050:Toluene; D010416:Pentachlorophenol; C033158:sulfuric acid