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

IF 1.2 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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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.