Abstract

In this work, a composite of polyethylene glycol (PEG) modified MoS₂ (PEG-MoS₂) was synthesized and used as the stationary phase of open-tubular capillary column via a chemical bonding strategy. The PEG-MoS₂ exhibited a sphere-like architecture through characterization of scanning electronic microscopy. p-phenylenediboronic acid was introduced as a linker to combine the PEG-MoS₂ with capillary column. A capillary electrochromatographic method was established for the determination of nine sulfonamides by using PEG-MoS₂-coated capillary column. The intra-day, inter-day, and column-to-column relative standard deviations (RSDs) of migration time and peak area were in the range of 0.80–4.38% and 1.61–9.22%, respectively. The limits of detection were in the range of 20.4–64.8 ng/mL. The recoveries in environmental water and milk were from 83.26 to 116.29% and 80.86 to 118.22%. This work is the first report that PEG-MoS₂ material is utilized as stationary phase for capillary electrochromatography.

中文翻译：

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毛细管电色谱法以PEG-MoS 2为固定相测定环境水和牛奶中的痕量磺酰胺

摘要

在这项工作中，合成了聚乙二醇（PEG）改性的MoS ₂（PEG-MoS ₂）的复合物，并通过化学键合策略将其用作开管毛细管柱的固定相。通过扫描电子显微镜的表征，PEG-MoS ₂表现出球形结构。引入对苯二甲硼酸作为连接体，将PEG-MoS ₂与毛细管柱结合。建立了一种毛细管电色谱法，用于使用PEG-MoS ₂测定九种磺酰胺涂层毛细管柱。迁移时间和峰面积的日内，日间和列间相对标准偏差（RSD）分别在0.80–4.38％和1.61–9.22％的范围内。检测限在20.4–64.8 ng / mL范围内。环境水和牛奶的回收率分别为83.26％至116.29％和80.86％至118.22％。这项工作是有关PEG-MoS ₂材料用作毛细管电色谱固定相的第一份报告。