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首页> 美国政府科技报告 >Application of Molecular Substituent Parameters for the Speciation of Trace Organometals in Energy-Related Process Fluids by Element-Selective HPLC
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Application of Molecular Substituent Parameters for the Speciation of Trace Organometals in Energy-Related Process Fluids by Element-Selective HPLC

机译：分子取代基参数在元素选择性高效液相色谱法测定能量相关工艺流体中痕量有机金属的应用

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摘要

High performance liquid chromatographic separations coupled with element-selective detectors provide trace molecular speciation methods applicable to energy-related process fluids and associated waste leachates. These materials present a challenge because they contain complex matrices whose chemistries are not well understood, and the processes have the potential to generate compounds containing toxic metals and metalloids that are either unexpected or have not been previously identified. Consequently, the ability to reliably ascertain the molecular structures of such unknown substances by relatively simple measurements of their chromatographic retention properties is very desirable. Our present work shows a linear correlation of the logarithm of the chromatographic capacity factor with the linear sum of the appropriate structural substituent parameters for a number of organoarsenicals, separated by an ion-exchange mechanism, and a number of organotins, separated by a hydrophobic mechanism. An illustration of the application of this linear free energy relationship as a diagnostic in the separation of trace organoarsenicals, by ion-exchange chromatography, was performed on the analysis of process waters from oil shale retorting and on leachates from raw oil shale.

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