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首页> 外文期刊>The Analyst: The Analytical Journal of the Royal Society of Chemistry: A Monthly International Publication Dealing with All Branches of Analytical Chemistry >In situ extract ion/preconcentration of PCBs and PAHs from aqueous samples using polytetrafluoroethylene tubing
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In situ extract ion/preconcentration of PCBs and PAHs from aqueous samples using polytetrafluoroethylene tubing

机译：使用聚四氟乙烯管从水样中原位提取PCBs和PAHs的离子/预富集

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摘要

In situ extraction/preconcentration of organics from water samples was accomplished using polytetrafluoroethylene (PTFE) tubing. Polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) were concentrated inside the tubing by flowing aqueous samples through it. The adsorbed PCBs and PAHs were then recovered by solvent desorption. The eluent was subsequently analyzed using gas chromatography with electron capture detection (GC-ECD) or gas chromatography with flame ionization detection (GC-FID). Multiple samples were simultaneously processed to concentrate organics onto several PTFE tubings. Analyses of seawater and surface microlayers using this technique demonstrated that organics in the surface microlayers were elevated with respect to those in the water column, consistent with previous findings. [References: 23]
机译：使用聚四氟乙烯（PTFE）管从水样中就地提取/预浓缩有机物。多氯联苯（PCB）和多环芳烃（PAH）通过使水性样品流过管道而浓缩。然后通过溶剂解吸回收吸附的PCB和PAH。随后使用带有电子捕获检测的气相色谱（GC-ECD）或带有火焰离子化检测的气相色谱（GC-FID）分析洗脱液。同时处理多个样品，以将有机物浓缩到几个PTFE管上。使用该技术对海水和表层微层的分析表明，表层微层中的有机物相对于水柱中的有机物升高，这与以前的发现一致。 [参考：23]

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