Evaluation of an Ion-Associate Phase Formed In Situ from the Aqueous Phase by Adding Benzethonium Chloride and Sodium Ethylbenzenesulfonate for Microextraction

AppliedChem Pub Date : 2023-01-09 DOI:10.3390/appliedchem3010003

N. Hata, Akane Igarashi, Rie Yasui, Maho Matsushita, Nozomi Kohama, Tomoka Komiyama, Kazuto Sazawa, H. Kuramitz, S. Taguchi

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引用次数: 2

Abstract

The concentration region at which the solvent is formed during in situ solvent formation microextraction is determined by varying the concentrations of the two components required to form a solvent. In particular, a solvent is formed in situ during ion-associate phase (IAP) microextraction by mixing an aqueous solution with an organic cation and an organic anion. In this study, benzethonium chloride (BenCl) and sodium ethylbenzenesulfonate (NaEBS) were employed as the organic cation and anion sources of model IAPs to thoroughly investigate the in situ solvent formation. Additionally, the formation of the IAPs and the solvent via centrifugation of the formed ion associates was examined. We demonstrated that ion associates are formed when the product of [EBS] and [Ben] is greater than the solubility product and [EBS] is greater than [Ben]. The highest extraction of polycyclic aromatic hydrocarbons (PAHs) was achieved with an amount of NaEBS 40 times greater than that of BenCl. A higher hydrophobicity in the IAP extraction of PAHs, estrogens, and pesticides facilitated extraction into the IAP.

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微萃取中加入苯并氯铵和乙苯磺酸钠在水相中原位形成离子伴生相的评价

在原位溶剂形成微萃取过程中，溶剂形成的浓度区域是通过改变形成溶剂所需的两种组分的浓度来确定的。特别地，通过将水溶液与有机阳离子和有机阴离子混合，在离子缔合相(IAP)微萃取过程中原位形成溶剂。本研究以苯并氯铵(BenCl)和乙基苯磺酸钠(NaEBS)为模型IAPs的有机正离子源和阴离子源，深入研究了原位溶剂的形成。此外，通过对形成的离子缔合物进行离心，考察了IAPs和溶剂的形成。我们证明，当[EBS]和[Ben]的产物大于溶解度产物且[EBS]大于[Ben]时，离子缔合形成。NaEBS用量为BenCl用量的40倍时，多环芳烃(PAHs)的提取率最高。多环芳烃、雌激素和农药在IAP中具有较高的疏水性，有利于提取到IAP中。

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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AppliedChem

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