Electrostatic Assembly of Graphene@SiO2 Composite for Enhanced Dispersive Solid-Phase Extraction: Targeting Eight Pesticide Residues

IF 1.3 4区化学 Q4 BIOCHEMICAL RESEARCH METHODS

Chromatographia Pub Date : 2024-10-24 DOI:10.1007/s10337-024-04372-6

Sheng Liu, Bo Li, Jian Xu, Yang Yu, He Zhu, Zhen Li, Zhaoxue Zhang, Mei Lv, Litao Wang

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Abstract

As a new carbon nanomaterial, graphene (Gr) has attracted wide attention in the field of separation and analysis because of its large specific surface area and strong hydrophobicity. A highly efficient and selective graphene/SiO₂ (Gr/SiO₂) dispersive solid-phase extraction (d-SPE) material was prepared through electrostatic assembly. This process involved the combination of negatively charged poly (sodium 4-styrenesulfonate) (PSS) mediated GS (denoted as PSS-GS) and positively-charged SiO₂, modified with triethoxy silane amino. The precursor material was characterized using FESEM, FTIR and so on. We evaluated the extraction performance of this new sorbent with eight pesticide residues, using the HPLC–MS method. The sorbent demonstrated excellent recovery rates for the pesticide residues under various frequency of use conditions and pH levels. It showed that the SiO₂ and Gr have synergistic extraction effect, and the composite material has good stability and reusable, Ultimately, this newly developed d-SPE material was successfully applied in the analysis of fruit juice samples, yielding good recovery rates in the range of 82.18 to 117.49%.

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静电组装Graphene@SiO2复合材料增强分散固相萃取：针对8种农药残留

石墨烯（Gr）作为一种新型的碳纳米材料，由于其比表面积大、疏水性强等特点，在分离分析领域受到了广泛的关注。采用静电组装法制备了一种高效、选择性的石墨烯/SiO2 （Gr/SiO2）分散固相萃取（d-SPE）材料。该工艺涉及带负电荷的聚4-苯乙烯磺酸钠（PSS）介导的GS（记为PSS-GS）和带正电荷的SiO2（三乙氧基硅烷氨基修饰）的组合。采用FESEM、FTIR等对前驱体材料进行了表征。采用高效液相色谱-质谱法评价了该吸附剂对8种农药残留的提取效果。在不同的使用频率和pH条件下，该吸附剂对农药残留的回收率都很好。结果表明，SiO2和Gr具有协同萃取效果，复合材料具有良好的稳定性和可重复使用性。最终，该复合材料成功应用于果汁样品的分析，回收率在82.18 ~ 117.49%之间。

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来源期刊

Chromatographia 化学-分析化学

CiteScore

3.40

自引率

5.90%

发文量

103

审稿时长

2.2 months

期刊介绍： Separation sciences, in all their various forms such as chromatography, field-flow fractionation, and electrophoresis, provide some of the most powerful techniques in analytical chemistry and are applied within a number of important application areas, including archaeology, biotechnology, clinical, environmental, food, medical, petroleum, pharmaceutical, polymer and biopolymer research. Beyond serving analytical purposes, separation techniques are also used for preparative and process-scale applications. The scope and power of separation sciences is significantly extended by combination with spectroscopic detection methods (e.g., laser-based approaches, nuclear-magnetic resonance, Raman, chemiluminescence) and particularly, mass spectrometry, to create hyphenated techniques. In addition to exciting new developments in chromatography, such as ultra high-pressure systems, multidimensional separations, and high-temperature approaches, there have also been great advances in hybrid methods combining chromatography and electro-based separations, especially on the micro- and nanoscale. Integrated biological procedures (e.g., enzymatic, immunological, receptor-based assays) can also be part of the overall analytical process.