Preparation of silica-supported carbon by Kraft lignin pyrolysis, and its use in solid-phase extraction of fluoroquinolones from environmental waters

Speltini, Andrea; Sturini, Michela; Maraschi, Federica; Mandelli, Elettra; Vadivel, Dhanalakshmi; Dondi, Daniele; Profumo, Antonella

doi:10.1007/s00604-016-1859-7

Cited by 33 publications

(8 citation statements)

References 47 publications

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“…At the same time, the pyrolytic treatment induced a remarkable surface area variation that decreased from 550 to 257 m 2 g −1 as a result of the occlusion of the silica pores involved by the growing of the carbonaceous matter. This is substantiated by measures of pore volume, that dropped down to 0.2 g cm −3 (0.8 g cm −3 for pristine silica), in full agreement with previous work [8] and other studies about carbon-modified silica materials [30,31].…”

Section: Characterization Of Ha-c@silicasupporting

confidence: 91%

Humic Acids Pyrolyzed onto Silica Microparticles for Solid-Phase Extraction of Benzotriazoles and Benzothiazoles from Environmental Waters

et al. 2019

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This work focuses on the extraction and determination of contaminants of environmental concern belonging to the classes of benzotriazoles and benzothiazoles from tap and raw river water samples. The sorbent, recently proposed by this research group, prepared by pyrolysis of humic acids (HAs) onto silica microparticles (HA-C@silica), was tested for fixed-bed SPE of benzotriazole and benzothiazole compounds by modulating its sorption affinity through the carbon loading. This was successfully increased from 10 to 20 wt% HAs and the obtained material, characterized by different techniques, provided quantitative adsorption at the sample native pH (7.5-8), for 50-250 mL samples spiked with each compound at the micrograms per litre levels. After extraction, the analytes were simultaneously desorbed by 4 mL methanol, even more reducible to small volume before HPLC-HESI-MS/MS analysis. Recovery was satisfactory for all compounds, ranging from 70 to 114%, with RSD values ≤ 16% (n = 3). The developed procedure allows quantitation of benzotriazoles at concentrations far below the environmental trigger limits. HA-C@silica turned out to be appealing in comparison with the commercial sorbents in terms of cost, recovery and pre-concentration for determination of such pollutants in actual surface waters. Good reproducibility was observed on independent HA-C@silica preparations.

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Section: Characterization Of Ha-c@silicasupporting

confidence: 91%

Humic Acids Pyrolyzed onto Silica Microparticles for Solid-Phase Extraction of Benzotriazoles and Benzothiazoles from Environmental Waters

et al. 2019

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“…Fluoroquinolones (FQs) are an important group of antibiotics that are widely used in human medicine and the field of animal breeding for inhibiting bacteria proliferation. However, the widespread usage of FQs antibiotics increases the possibility of residues appearing in environmental aqueous and food products [1]. Because of the hydrophilicity of FQs, water is mainly affected by its contamination [2].…”

Section: Introductionmentioning

confidence: 99%

Use of hydroxypropyl β‐cyclodextrin hybrid monolithic material as adsorbent for dispersive solid‐phase extraction of fluoroquinolones from environmental water samples

Zhou

2022

J of Separation Science

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In this study, the hydroxypropyl β-cyclodextrin hybrid monolithic material was fabricated and firstly applied as an adsorbent for dispersive solidphase extraction coupled with high-performance liquid chromatography to detect trace-level seven fluoroquinolones in water samples. The prepared hydroxypropyl β-cyclodextrin hybrid monolithic material was characterized by Fourier-transform infrared spectroscopy, scanning electron microscopy, and adsorption experiments, which showed excellent specific adsorption to the target fluoroquinolones. Under the optimized conditions, the extraction methodology showed satisfactory precision with relative standard deviations between 2.6% and 5.6%, good linearity (R 2 ≥ 0.9990), and satisfactory recoveries (82.5-91.8%).The limits of detection and limits of quantification of the method were in the range of 0.4-1.2 and 1.4-4.0 ng/mL, respectively, which confirmed the possibility of quantifying trace levels. Furthermore, the material could be reused at least five times. These results demonstrated that the hydroxypropyl β-cyclodextrin hybrid monolithic material was a promising adsorbent for fluoroquinolones, and the established method combined dispersive solid-phase extraction with highperformance liquid chromatography was suitable for the determination of fluoroquinolones in aqueous samples.

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“…A wide variety of procedures and techniques have been applied for the extraction and quantification of FQs in surface water samples. In this sense, the online extraction methodologies [ 11 ], liquid-liquid extraction with subsequent salting-out [ 14 ], solid phase extraction (SPE) by mixed-bed sorbents, C18, or OASIS HLB [ 4 , 15 ], capillary electrophoresis [ 16 ], magnetic mixed hemimicelles [ 17 ], restricted access materials [ 18 ], boron-rich monoliths [ 19 ], Kraft’s lignin [ 20 ], and molecularly imprinted polymers (MIP) can be mentioned [ 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

The Ultratrace Determination of Fluoroquinolones in River Water Samples by an Online Solid-Phase Extraction Method Using a Molecularly Imprinted Polymer as a Selective Sorbent

Baeza

Urriza-Arsuaga²,

Navarro-Villoslada³

et al. 2022

Molecules

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Fluoroquinolones (FQs) are broad-spectrum antibiotics widely used to treat animal and human infections. The use of FQs in these activities has increased the presence of antibiotics in wastewater and food, triggering antimicrobial resistance, which has severe consequences for human health. The detection of antibiotics residues in water and food samples has attracted much attention. Herein, we report the development of a highly sensitive online solid-phase extraction methodology based on a selective molecularly imprinted polymer (MIP) and fluorescent detection (HPLC-FLD) for the determination of FQs in water at low ng L−1 level concentration. Under the optimal conditions, good linearity was obtained ranging from 0.7 to 666 ng L−1 for 7 FQs, achieving limits of detection (LOD) in the low ng L−1 level and excellent precision. Recoveries ranged between 54 and 118% (RSD < 17%) for all the FQs tested. The method was applied to determining FQs in river water. These results demonstrated that the developed method is highly sensitive and selective.

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Preparation of silica-supported carbon by Kraft lignin pyrolysis, and its use in solid-phase extraction of fluoroquinolones from environmental waters

Cited by 33 publications

References 47 publications

Humic Acids Pyrolyzed onto Silica Microparticles for Solid-Phase Extraction of Benzotriazoles and Benzothiazoles from Environmental Waters

Humic Acids Pyrolyzed onto Silica Microparticles for Solid-Phase Extraction of Benzotriazoles and Benzothiazoles from Environmental Waters

Use of hydroxypropyl β‐cyclodextrin hybrid monolithic material as adsorbent for dispersive solid‐phase extraction of fluoroquinolones from environmental water samples

The Ultratrace Determination of Fluoroquinolones in River Water Samples by an Online Solid-Phase Extraction Method Using a Molecularly Imprinted Polymer as a Selective Sorbent

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