Magnetic solid-phase extraction based on magnetic amino modified multiwalled carbon nanotubes for the fast determination of seven pesticide residues in water samples

Dong, Jiani; Feng, ZhiAo; Kang, Songsong; An, Ming; Wu, Guodong

doi:10.1039/d0ay00288g

Cited by 18 publications

(11 citation statements)

References 32 publications

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“…According to references [21], different kinds of carbon nanotubes could be applied as MSPE materials, including single-walled carbon nanotubes, multi-walled carbon nanotubes, hydroxylated carbon nanotubes, amino modified carbon nanotubes and carboxylic carbon nanotubes. According to the structural characteristics of synthetic cathinones, all of the carbon nanotubes mentioned above have potential in the pretreatment of synthetic cathinones in complex matrix, so MSPE based on the different adsorbents of 5 types carbon nanotubes was performed during the pretreatment of MC in human urine.…”

Section: Selection Of Magnetic Carbon Nanotubementioning

confidence: 99%

Simultaneous Determination of 16 Kinds of Synthetic Cathinones in Human Urine Using a Magnetic Nanoparticle Solid-Phase Extraction Combined with Gas Chromatography-Mass Spectrometry

et al. 2021

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A specific and sensitive approach using magnetic nanoparticle solid-phase extraction combined with gas chromatography–mass spectrometry (GC-MS) was carried out and applied in the simultaneous determination of 16 kinds of synthetic cathinones in human urine. The functionalized extraction material (Fe3O4/NH2-MWCNTs) was synthesized and factors affecting the extraction efficiency were all tested. Under the optimized conditions of magnetic nanoparticle solid-phase extraction, the determination of synthetic cathinones in human urine was carried out with GC-MS. Good linear relationships of 16 kinds of synthetic cathinones were obtained in the range of 0.005–5.00 μg/mL with the correlation coefficients (r) ranging from 0.9901 to 0.9979, the limits of detection were in the range between 0.005 and 0.01 μg/mL, and the limits of quantitation were between 0.01 and 0.02 μg/mL. Furthermore, the average intra-day precisions were below 8.90%, the average inter-day precisions were less than 9.52%, and the average recoveries were between 87.03% and 99.13%, respectively. The results show the advantages of the approach in the determination of trace synthetic cathinones in complex matrixes, such as environmentally friendly, fast detection, high efficiency and sensitivity. The practical application indicated that this method could provide scientific basis for the determination of drugs of abuse in forensic laboratories.

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Section: Selection Of Magnetic Carbon Nanotubementioning

confidence: 99%

Simultaneous Determination of 16 Kinds of Synthetic Cathinones in Human Urine Using a Magnetic Nanoparticle Solid-Phase Extraction Combined with Gas Chromatography-Mass Spectrometry

et al. 2021

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“…It also has a strong ability to establish interactions with dyes or other organic materials. The continuous decrease in its price makes it an important nanomaterial for water and environmental decontaminations [ 3 , 4 , 5 , 6 , 7 , 8 ]. The properties of MWCNT can be further improved by fabricating a complex with Fe 3 O 4 ; thus, combining its mechanical and electrical properties, as well as its thermo-optical properties with the superparamagnetic behavior of Fe 3 O 4 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of MWCNT-COOH/Fe3O4 and CNT-COOH/Fe3O4/NiO Nanocomposites: Assessment of Adsorption and Photocatalytic Performance

et al. 2022

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In this study the adsorption and photodegradation capabilities of modified multi-walled carbon nanotubes (MWCNTs), using tartrazine as a model pollutant, is demonstrated. MWCNT-COOH/Fe3O4 and MWCNT-COOH/Fe3O4/NiO nanocomposites were prepared by precipitation of metal oxides in the presence of MWCNTs. Their properties were examined by X-ray diffraction in powder (XRD), Fourier-transform infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman spectroscopy, synchrotron-based Scanning PhotoElectron Microscopy (SPEM), and Brunauer-Emmett-Teller (BET) analysis. It was found that the optimal adsorption conditions were pH 4 for MWCNT-COOH/Fe3O4 and pH 3 for MWCNT-COOH/Fe3O4/NiO, temperature 25 °C, adsorbent dose 1 g L−1, initial concentration of tartrazine 5 mg L−1 for MWCNT-COOH/Fe3O4 and 10 mg L−1 for MWCNT-COOH/Fe3O4/NiO and contact time 5 min for MWCNT-COOH/Fe3O4/NiO and 15 min for MWCNT-COOH/Fe3O4. Moreover, the predominant degradation process was elucidated simultaneously, with and without simulated sunlight irradiation, using thermal lens spectrometry (TLS) and UV–Vis absorption spectrophotometry. The results indicated the prevalence of the photodegradation mechanism over adsorption from the beginning of the degradation process.

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“…CNTs have the characteristics of a large surface area, narrow pore-size distribution, low density and a high-binding functional group; MWCNTs especially have a large number of groups and unique structures on their large specific surface, so they have strong adsorption ability to be used in the QuEChERS pretreatment process to absorb interfering substances (detergents) and remove substances such as highpercentage pigments and hydrophobic substances from samples as an alternative d-SPE adsorbent [33,34]. Recently, MWCNTs [35,36], aminated MWCNTs [37], and magnetic aminated MWCNTs [38,39] have attracted much attention due to their high chemical stability, large surface area, strong adsorption capacity, wide pH application range and low cost [40,41]. Pan et al [42] utilized MWCNTs as d-SPE adsorbents to improve and optimize the QuEChERS method.…”

Section: Introductionmentioning

confidence: 99%

Research and Application of In Situ Sample-Processing Methods for Rapid Simultaneous Detection of Pyrethroid Pesticides in Vegetables

et al. 2022

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A novel rapid and cost-effective pre-processing method for the simultaneous determination of pyrethroid pesticides in vegetables has been developed and validated. The process of pesticide extraction was carried out by the QuEChERS (quick, easy, cheap, effective, rugged and safe) method combined with filtration by filter paper, and cleanup was carried out by the multi-plug-filtration-cleanup (m-PFC) method with no centrifuge program during the whole process. The pre-processing method is optimized for gas chromatography (GC). The process is convenient and time saving, requiring just a few seconds per sample. The recovery rate (70–120%), limit of detection (0.0001–0.007 mg/kg), precision (0.2–9.3%) and accuracy for each analyte were determined in 10 representative vegetables with good results. Finally, the feasibility of the developed method was further confirmed by the successful determination of pyrethroid-pesticide residues in pyrethroid-containing practical samples within the processing method coupled with thin-layer chromatography and a colloidal-gold test strip.

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Magnetic solid-phase extraction based on magnetic amino modified multiwalled carbon nanotubes for the fast determination of seven pesticide residues in water samples

Abstract: Magnetic solid-phase extraction based on a magnetic amino modified multiwalled carbon nanotubes for the fast determination of seven pesticide residues in water samples.

Cited by 18 publications

References 32 publications

Simultaneous Determination of 16 Kinds of Synthetic Cathinones in Human Urine Using a Magnetic Nanoparticle Solid-Phase Extraction Combined with Gas Chromatography-Mass Spectrometry

Simultaneous Determination of 16 Kinds of Synthetic Cathinones in Human Urine Using a Magnetic Nanoparticle Solid-Phase Extraction Combined with Gas Chromatography-Mass Spectrometry

Synthesis and Characterization of MWCNT-COOH/Fe3O4 and CNT-COOH/Fe3O4/NiO Nanocomposites: Assessment of Adsorption and Photocatalytic Performance

Research and Application of In Situ Sample-Processing Methods for Rapid Simultaneous Detection of Pyrethroid Pesticides in Vegetables

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