多级硅胶/氧化铝柱和GC/MS法测定焚烧炉固体排放物中的痕量PCBs
DETERMINATION OF RESIDUAL PCBs IN THE SOLID WASTES OF INCINERATOR
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摘要: 本文采用多段硅胶柱与碱性氧化铝柱提取纯化焚烧炉烟灰和炉灰中残留的多氯联苯(PCBs).用13C标记物测定了回收率,比较了固体作品的索氏提取法和柱直接提取法,结果表明:柱提取方法是一种快速有效测定固体物中PCBs的方法.应用HRGC/MS及GC/ECD定量测定了焚烧炉固体排放物中PCBs总残留量及同系物含量.Abstract: Acid/base silica column and basic alumina column cleanups are applied to the extraction and purification of residual polychlormatd biphenyls (PCBs) in the solid wastes of incinerator. Recoveries of 13C-labelled PCBs surrogates were determined and the comparison was made between methods of Soxhlet extraction and column extraction. This method is proved to be effective and convenient for the extraction of PCBs from solid waste samples. In addition, the content of PCB homologes in the stack ash were determined by high resolution gas chromatography and mass spectrometry (HRGC/MS).
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Key words:
- acid/base silica column /
- incineration /
- determination of PCBs /
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