Determination of fluoroquinolones in environmental water and milk samples treated with stir cake sorptive extraction based on a boron‐rich monolith

Mei, Meng; Huang, Xiaojia

doi:10.1002/jssc.201600232

Cited by 30 publications

(12 citation statements)

References 34 publications

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“…Polar phenols were extracted from environmental water by means of an allylthiourea and DB polymer using DMF as a porogen solvent and AIBN as an initiator [53]. B-agonists have been extracted in milk and swine urine samples by SCSE using a poly(4-vinylbenzoic acid-divinylbenzene) monolith [54], while a novel boron-rich monolith has been synthesized and characterized for the determination of fluoroquinolones in environmental water and milk samples [55].…”

Section: Stir Cake Sorptive Extractionmentioning

confidence: 99%

Recent Advances in Extraction and Stirring Integrated Techniques

Cárdenas

Lucena

2017

Separations

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Abstract:The extraction yield of a microextraction technique depends on thermodynamic and kinetics factors. Both of these factors have been the focus of intensive research in the last few years. The extraction yield can be increased by synthesizing and using novel materials with favorable distribution constants (one of the thermodynamic factors) for target analytes. The extraction yield can also be increased by improving kinetic factors, for example, by developing new extraction modes. Microextraction techniques are usually non-exhaustive processes that work under the kinetic range. In such conditions, the improvement of the extraction kinetics necessarily improves the performance. Since the extraction yield and efficiency is related to how fast the analytes diffuse in samples, it is crucial to stir the sample during extraction. The stirring can be done with an external element or can be integrated with the extraction element in the same device. This article reviews the main recent advances in the so-called extraction/stirring integrated techniques with emphasis on their potential and promising approaches rather than in their applications.

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Section: Stir Cake Sorptive Extractionmentioning

confidence: 99%

Recent Advances in Extraction and Stirring Integrated Techniques

Cárdenas

Lucena

2017

Separations

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“…Recently, different methods have been applied for determination of FQs [12], such as capillary electrophoresis [13], high pressure liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) [14][15][16][17][18][19], coupled to diode array detection [20,21], or coupled to resonance light scattering [22]. Fluorimetric-based methods have also been developed based on FQs intrinsic fluorescent properties as in the proposed methodology for quantification of CIP in seawater at ng L −1 level [23], or in the screening method applied in groundwater samples from intensive livestock production systems [24], or even resorting to automation for preconcentration in molecularly imprinted polymers [25].…”

Section: Introductionmentioning

confidence: 99%

Screening of fluoroquinolones in environmental waters using disk-based solid-phase extraction combined to microplate fluorimetric determination and LC-MS/MS

Peixoto

Tóth

Barreiros

et al. 2019

International Journal of Environmental Analytical Chemistry

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Fluoroquinolones are in the order of the day concerning environmental contamination through anthropogenic activities, resulting in increased risk for antibiotic resistance dissemination. In this context, accessible, low-cost analytical methods are required for implementation of comprehensive surveillance and screening schemes. In this work, we propose a down-scaled disk-based solidphase extraction system from which the eluate can be first screened by miniaturized fluorimetric reading, followed by individual determination of target fluoroquinolones (ciprofloxacin, norfloxacin, and enrofloxacin) by liquid chromatography combined to tandem mass spectrometry. The fluorimetric measurement is based on the intrinsic fluorescence of fluoroquinolones. Diskbased retention was performed after sample acidification (pH 4.0) by mixed-mode cation exchange using polystyrene divinylbenzene sulphonated sorbent. Sample loading was precisely controlled in a dedicated flow system operating at 4.0 mL min −1. Different eluent compositions were tested, with elution performed by 1.00 mL of methanol-ammonium hydroxide (98:2, v/v), with subsequent reading of eluate in both detectors. Quantification was attained for 2-25 µg L −1 range, with LOD values at 1 µg L −1. The proposed approach was successfully applied to estuarine waters from the Douro River, with comparable results to a conventional SPE-LC-MS/MS procedure.

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“…[22][23][24] Silica-based chemically bonded phases has also been applied such as silica-supported graphitic carbon nitride 25 and graphene-derivatized silica. 26 More recent approaches have also included the application of boron-enriched divinylbenzene monolith, 27 mixed hemimicelles based on magnetic Fe 3 O 4 nanoparticles coated with sodium dodecyl sulfate, 28 and ZnO-modified methacrylic acid-co-ethylene dimethacrylate polymer monolith 29 as sorbents. However, sample treatment can be time and reagent consuming, which can limit the sample throughput.…”

Section: Introductionmentioning

confidence: 99%