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首页> 外文期刊>Environmental Science & Technology >Automated HPLC Fractionation of PCDDs and PCDFs and Planar and Nonplanar PCBs on C_(18)-Dispersed PX-21 Carbon
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Automated HPLC Fractionation of PCDDs and PCDFs and Planar and Nonplanar PCBs on C_(18)-Dispersed PX-21 Carbon

机译:在C_(18)分散的PX-21碳上自动进行PCDD和PCDF以及平面和非平面PCB的HPLC分离

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摘要

The separation of polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), and a number of specific di-, mono-, and non-ortho,-orhto′-chlorine (o,o′-Cl) substituted chlorobiphenyl congeners (PCBs) of toxicological significance from bulk PCBs and other interfering residues is critical foraccurate quantitation of these compounds. Activated carbon has long been the most commonly used adsorbent for separation of these compounds into fractions suitable for analysis by capillary GC/ECD and by GC/MS. We have developed a procedure that uses HPLC columns containing PX-21 activated carbon dispersed by C_(18) (octadecylsilane) sorbent in combination with an automated, quaternary HPLC autoinjector-fraction collector apparatus to attain these separative objectives. Our system produces four discrete fractions containing bulk PCBs (di- to tetra-o,o′-chlorosubstituted); mono-o,o′-Cl PCBs; non-o,o′-Cl PCBs; and PCDDs/PCDFs. The fractionations are achieved with reduced requirements for manpower, and our system provides flexibility toward easy customization to meet specific analytical needs.
机译:分离多氯二苯并对二恶英(PCDD),多氯二苯并呋喃(PCDF)以及许多特定的二,一和非邻-邻-氯(o,o'-Cl)取代的氯联苯来自大量PCB和其他干扰残留物的具有毒理学意义的同类物(PCB)对于准确定量这些化合物至关重要。长期以来,活性炭一直是最常用的吸附剂,用于将这些化合物分离成适合通过毛细管GC / ECD和GC / MS分析的馏分。我们开发了一种程序,该程序使用包含通过C_(18)(十八烷基硅烷)吸附剂分散的PX-21活性炭的HPLC色谱柱,与自动的季四级HPLC自动进样器-馏分收集器设备结合使用,以实现这些分离目标。我们的系统产生四个离散的馏分,其中包含大量PCB(二-至四-o,o'-氯取代);单邻,邻'-氯多氯联苯;非o,o'-Cl PCB;和PCDD / PCDF。通过减少人力需求即可实现分级分离,并且我们的系统提供了易于定制的灵活性,以满足特定的分析需求。

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