Magnetic polyethyleneimine functionalized reduced graphene oxide as a novel magnetic solid-phase extraction adsorbent for the determination of polar acidic herbicides in rice | |
Department | 中科院西北特色植物资源化学重点实验室/甘肃省天然药物重点实验室 |
Li N(李娜)1,2; Chen J(陈娟)1; Shi YP(师彦平)1; Chen J(陈娟); Shi YP(师彦平) | |
2017 | |
Source Publication | Analytica Chimica Acta |
ISSN | 0003-2670 |
Volume | 949Pages:23-34 |
Abstract | A novel magnetic polyethyleneimine modified reduced graphene oxide (Fe3O4@PEI-RGO) had been fabricated based on a self-assemble approach between positive charged magnetic polyethyleneimine (Fe3O4@PEI) and negative charged GO sheets via electrostatic interaction followed by chemical reduction of GO to RGO. The as-prepared Fe3O4@PEI-RGO was characterized by transmission electron microscopy (TEM), Fourier transform infrared spectrometry (FT-IR), X-ray diffraction (XRD), thermal gravimetric analyzer (TGA), vibrating sample magnetometer (VSM) and zeta potential analysis, and then was successfully applied to determine four phenoxy acid herbicides and dicamba in rice coupled with high performance liquid chromatography (HPLC). As a surface modifier of RGO, PEI not only effectually affected the surface property of RGO (e.g. zeta potential), but also changed the polarity of RGO and offered anion exchange groups to polar acidic herbicides, which would directly influence the type of adsorbed analytes. Compared with Fe3O4@PEI, Fe3O4/RGO and Fe3O4@PEI-GO, the as-prepared Fe3O4@PEI-RGO, integrating the superiority of PEI and RGO, showed higher extraction efficiency for polar acidic herbicides. Besides, the adsorption mechanism was investigated as well. It turned out that electrostatic interaction and π-π interaction were considered to be two major driving force for the adsorption process. Response surface methodology (RSM), a multivariate experimental design technique, was used to optimize experimental parameters affecting the extraction efficiency in detail. Under the optimal conditions, a satisfactory performance was obtained. The calibration curves were linear over the concentration ranging from 2 to 300 ng g−1 with correlation coefficients (r) between 0.9985 and 0.9994. The limits of detection (LODs) were in the range of 0.67–2 ng g−1. The recoveries ranged from 87.41% to 102.52% with relative standard deviations (RSDs) less than 8.94%. Taken together, the proposed method was an efficient pretreatment and enrichment procedure and could be successfully applied for selective extraction and determination of polar acidic herbicides in complex matrices. |
Keyword | Magnetic Polyethyleneimine Reduced Graphene Oxide Magnetic Solid-phase Extraction Polar Acidic Herbicides Adsorption Mechanism |
Subject Area | 分析化学与药物化学 |
DOI | 10.1016/j.aca.2016.11.016 |
Funding Organization | the National Nature Science Foundation of China (Nos. 21375136;21575150);the Scholar Program of West Light Project, Chinese Academy of Sciences |
Indexed By | SCI |
If | 4.950 |
Language | 英语 |
Funding Project | 药物化学成分研究组 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/20908 |
Collection | 中科院西北特色植物资源化学重点实验室/甘肃省天然药物重点实验室 |
Corresponding Author | Chen J(陈娟); Shi YP(师彦平) |
Affiliation | 1.Key Laboratory of Chemistry of Northwestern Plant Resources of the CAS and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, PR China 2.University of Chinese Academy of Sciences, Beijing, 100039, PR China |
Recommended Citation GB/T 7714 | Li N,Chen J,Shi YP,et al. Magnetic polyethyleneimine functionalized reduced graphene oxide as a novel magnetic solid-phase extraction adsorbent for the determination of polar acidic herbicides in rice[J]. Analytica Chimica Acta,2017,949:23-34. |
APA | Li N,Chen J,Shi YP,陈娟,&师彦平.(2017).Magnetic polyethyleneimine functionalized reduced graphene oxide as a novel magnetic solid-phase extraction adsorbent for the determination of polar acidic herbicides in rice.Analytica Chimica Acta,949,23-34. |
MLA | Li N,et al."Magnetic polyethyleneimine functionalized reduced graphene oxide as a novel magnetic solid-phase extraction adsorbent for the determination of polar acidic herbicides in rice".Analytica Chimica Acta 949(2017):23-34. |
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