Buhr A, Genning C, Salthammer T
Fraunhofer-Institut für Holzforschung, Wilhelm-Klauditz-Institut, Braunschweig, Germany.
Fresenius J Anal Chem. 2000 May;367(1):73-8. doi: 10.1007/s002160051601.
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.
对木材及木质产品中的五氯苯酚（PCP）和五氯酚钠（Na - PCP）进行常规分析的主要问题在于确定关键的PCP含量。这项任务需要可靠的分析方法和统计测试。本文描述了一种分析程序，该程序能够以足够的灵敏度和准确度测定PCP和Na - PCP。发现一个中等尺寸的筛子（4×4毫米方形筛网）适用于研磨步骤。系统测试了不同的萃取技术和溶剂。在甲苯/硫酸混合溶剂中通过超声和振荡相结合的萃取方式显示出最佳回收率。洗脱后的PCP和Na - PCP用乙酸酐衍生化，并通过气相色谱/电子捕获检测器（GC/ECD）进行测定。检测限和定量限分别为0.14毫克/千克和0.40毫克/千克。
