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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Characterization of 9 gas chromatography columns by Kovats and Lee retention indices for dioxin analysis
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Characterization of 9 gas chromatography columns by Kovats and Lee retention indices for dioxin analysis

机译：Kovats和Lee保留指标对二恶英分析进行9个气相色谱柱的表征

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Polychlorinated dibenzo-p-dioxins and furans offer a complex separation challenge due to their chemical similarity and 5020 possible congeners, including the Br/CI congeners. Not only are these compounds difficult to separate, but they are also difficult to identify. Expensive reference materials are needed for conventional "dioxin analysis", usually requiring C-13 labeled and native compounds. A retention index database offers a potential solution to lower the difficulty and cost to identify dioxins. This study describes the use of Kovats and Lee retention indices for the identification of chlorinated dioxins and furans as well as their brominated and mixed chloroibromo counterparts. Eight columns were characterized with all 136 tetra through octa substituted chlorinated dioxins and furans as well as 32 brominated and mixed chloroibromo congeners. Columns were then compared to identify which stationary phases provided the best resolution for critical congeners, like the 2,3,7,8 substituted compounds. Column phase selectivity was also investigated to identify best commercially-available column pairings for confirmatory analyses and GC x GC separations. The Rtx-Dioxin2 and Rxi-17SilMS showed unique selectivity for dioxins and furans and could be used as confirmatory columns or as a powerful GC x GC column set. (C) 2019 Published by Elsevier B.V.
机译：多氯二苯苄焦 - P-Dioxins和Furans由于它们的化学相似性和5020个可能的同源物而提供复杂的分离挑战，包括Br / Ci Congeners。这些化合物不仅难以分离，而且它们也难以识别。常规的“二恶英分析”需要昂贵的参考材料，通常需要C-13标记和天然化合物。保留索引数据库提供潜在的解决方案，以降低识别二恶英的难度和成本。本研究描述了使用Kovats和Lee保留指标用于鉴定氯化二恶英和呋喃以及它们的溴化和混合氯纤维同胞。八柱的特征在于通过Octa取代的氯化二恶英和呋喃，以及32溴化和混合氯纤维同铬剂。然后将柱进行比较，以鉴定哪些固定阶段为临界同源物提供最佳分辨率，如2,3,7,8个取代的化合物。还研究了柱相选择性以鉴定用于确认分析和GC X GC分离的最佳市售柱配对。 RTX-DIOxin2和RXI-17Silms对二恶英和呋喃的选择性均为独特的选择性，并且可以用作确认栏或作为强大的GC X GC柱集。 （c）2019年由elestvier b.v发布。

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