A General Model for the Optimization of Sample Processing Conditions by Solid‐Phase Extraction Applied to the Isolation of Estrogens from Urine

D. Seibert, C. Poole
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引用次数: 30

Abstract

A general model is presented for the prediction of experimental conditions for the isolation of organic compounds from aqueous solution by solid-phase extraction. The solvation parameter model is used to predict the variation of retention as a function of solvent composition from characteristic solute descriptors and combined with a frontal analysis model to adjust the predicted breakthrough volumes to account for the influence of the small number of theoretical plates characteristic of sorbent cartridges. System maps are used to determine breakthrough volumes for sample processing, the composition and volume of wash solvents for matrix simplification, and the composition and volume of eluting solvents. System maps are provided for an octadecylsiloxane-bonded silica sorbent with methanol and acetonitrile as cosolvents with water. These maps are used to calculate the experimental conditions for the isolation of estrogens from urine and the model validated by experimental verification of the model predictions. The proposed approach provides a simple theoretical framework for computer-aided method development in solid-phase extraction.
固相萃取法分离尿液中雌激素样品处理条件优化的通用模型
提出了一种预测固相萃取法分离水溶液中有机化合物实验条件的通用模型。溶剂化参数模型用于从特征溶质描述符中预测保留作为溶剂组成的函数的变化,并结合正面分析模型来调整预测的突破体积,以考虑吸收剂墨盒的理论板数量少的特性的影响。系统图用于确定样品处理的突破体积,用于基质简化的洗涤溶剂的组成和体积,以及洗脱溶剂的组成和体积。系统图提供了十八烷基硅氧烷键合二氧化硅吸附剂与甲醇和乙腈作为共溶剂与水。这些图用于计算从尿液中分离雌激素的实验条件,并通过实验验证模型预测来验证模型。该方法为固相萃取的计算机辅助方法开发提供了一个简单的理论框架。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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