Core–shell electrospun polybutylene terephthalate/polypyrrole hollow nanofibers for micro-solid phase extraction

Bagheri, Habib; Rezvani, Omid; Banihashemi, Solmaz

doi:10.1016/j.chroma.2015.12.082

Cited by 39 publications

(13 citation statements)

References 28 publications

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“…This result can be attributed to the mechanical stability of titania, high aspect ratio of PA nanofibers as well as satisfactory extraction/desorption behavior of the conductive polymer (PPy) . It is notable that exceeding the values of PPy over than 4% w/v, prevents the deposition of nanofibers on the collector . The incorporation of two identical sheets on both sides of the microchip, improves the analyte uptake from the plasma sample (Figure B).…”

Section: Resultsmentioning

confidence: 95%

“…The sorption/desorption associated parameters such as the sorbent composition, number of sheets, sample dilution factor, sample volume, flow rate, pH, desorbing solvent type, its volume and flow rate, as well as number of desorption cycles were optimized. A flow rate of 0.5 mL/h was utilized for core–shell electrospinning to achieve more stable Taylor Cone emanating from the coaxial nozzle tip . Various hollow nanofibers were electrospun in order to investigate the effect of structure and chemical composition on the sorption capabilities.…”

Section: Resultsmentioning

confidence: 99%

“…Electrospun polymeric nanofibers are of conspicuous importance due to their high porosity, surface area, functional groups as well as splendid mechanical stability. These noticeable characteristics in comparison with the powdered nanomaterials have made electrospun nanofibers appropriate candidates for extraction purposes .…”

Section: Introductionmentioning

confidence: 99%

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Toward higher extraction and enrichment factors via a double‐reservoirs microfluidic device as a micro‐extractive platform

Rezvani

Baraazandeh

Bagheri

2019

J of Separation Science

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In this study, firstly, a double‐reservoir and switchable prototype of a micro‐chip along with the respective holders were fabricated. A cyclic desorption process using microliter volume of organic solvent was adopted to prevent any outdoor contamination. As extractive phases, two identical sheets of electrospun polyamide/polypyrrole/titania nanofibers were synthesized using core–shell electro‐spinning technique and utilized for determination of memantine in plasma samples. Field emission scanning electron microscopy images showed a high degree of porosity and homogeneity throughout the sheet structure. Also, energy dispersive X‐ray analysis confirmed the presence of titania, while the recorded Fourier transform infrared spectra proved the chemical structures of the polymeric mats. The incorporation of titania as well as polypyrrole in the composition of polyamide nanofibers improved both mechanical stability and extraction capacity of the extractive phase and therefore facilitated the extraction/desorption process. The limits of detection and quantification were 0.01 and 0.04 ng/mL, respectively. In addition, the interday and intraday precisions were lower than 6.7% (n = 3). The linearity was in the range of 0.14–75.00 ng/mL, while recoveries were between 94.1 and 98.4% with the regression coefficient of 0.9987.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

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Toward higher extraction and enrichment factors via a double‐reservoirs microfluidic device as a micro‐extractive platform

Rezvani

Baraazandeh

Bagheri

2019

J of Separation Science

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“…It is therefore an important factor, which could affect the analyte extraction recovery from aquatic samples. The effect of this parameter on the extraction efficiency of triazines from [32] μ-SPE-GC-MS 0.05-0.09 0.3-500 50 25 [33] water samples was evaluated and the sample pH was changed in the range of 3-11 ( Figure 3A). First, by increasing the pH, extraction efficiency was increased and after the neutral condition (pH = 7) the extraction efficiency declined.…”

Section: Optimization Of the Thin Film Microextractionmentioning

confidence: 99%

Electrospun magnetic polybutylene terephthalate nanofibers for thin film microextraction

Bagheri

Mobara

Roostaie

et al. 2017

J of Separation Science

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A thin film microextraction method using elecrospun magnetic polybutylene terephthalate nanofibers is developed and implemented to isolate some selected triazines. Due to the high mechanical stability of these nanofibers, they are repeatedly used under harsh magnetic stirring and ultrasonic conditions without any damage and structure degradation. The presence of magnetic nanoparticles within the nanofiber structure increases the extraction efficiency while the fibers could be collected by an external magnet. The synthesized nanocomposite showed strong affinity toward the selected analytes. Apart from the concentration of magnetic nanoparticles within the nanocomposite network, the effect of different parameters on the extraction and desorption processes including the sample pH, extraction time, sample volume, type of desorption solvent, solvent volume, and desorption time were optimized. Eventually, the detection limits were in the range of 0.02-0.05 ng/mL, while the limits of quantification were between 0.1 and 0.2 ng/mL. The linear dynamic range was 0.1-100 ng/mL, and the relative standard deviations were 4-9% (n = 3). The developed method was extended to the real water samples, and the relative recoveries were in the range of 86-103%, indicating that the prepared sorbent is suitable for extraction of triazines from environmental samples.

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“…To increase the adsorption of different compounds on electrospun nanofibers, the following methods have been attracted the most attention: (1) increasing the surface area of nanofibers, (2) surface modification of nanofibers with functional groups and (3) fabricating of composite nanofibers [1,[16][17][18]. Composite nanofibers modified by the functional groups have been extensively used because of their specific properties such as: (1) high surface-to-volume ratio,…”

Section: Introductionmentioning

confidence: 99%

Electrospun biocompatible Chitosan/MIL-101 (Fe) composite nanofibers for solid-phase extraction of Δ9-tetrahydrocannabinol in whole blood samples using Box-Behnken experimental design

Asiabi

Mehdinia

Jabbari

2017

Journal of Chromatography A

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The nanofibers of biocompatible Chitosan/MIL-101 (Fe) composite were synthesized by a simple, cheap and accessible electrospining method and applied for mat-based extraction of trace amount of Δ9-tetrahydrocannabinol (THC) from human whole blood sample following its combination by high performance liquid chromatography-ultraviolet detection. The composite nanofibres were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction and N adsorption-desorption experiments. The volume of eluting solvent, sorbent amount, pH and% NaCl (w/v) influencing on the responses were investigated using factorial experimental design. The optimum point was achieved by analysis of the results according to design expert (DX) software. The volume of eluting solvent, sorbent amount and pH were significant variables, and 150μL, 7mg and 7.0 were respectively chosen for obtaining the best extraction response. Under the optimum conditions, the method was exhibited a linear range of 0.1-100μgL (R=0.9943) for THC with a detection limit of 0.04μgL. Acceptable values for intra-day (3.2%) and inter-day (4.8%) relative standard deviations were obtained. The high preconcentration factor (970) and satisfactory recoveries (88.2%-92.4%) in whole blood samples were achieved which proved the capability of the method for trace determination of THC in the human whole blood samples.

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Core–shell electrospun polybutylene terephthalate/polypyrrole hollow nanofibers for micro-solid phase extraction

Cited by 39 publications

References 28 publications

Toward higher extraction and enrichment factors via a double‐reservoirs microfluidic device as a micro‐extractive platform

Toward higher extraction and enrichment factors via a double‐reservoirs microfluidic device as a micro‐extractive platform

Electrospun magnetic polybutylene terephthalate nanofibers for thin film microextraction

Electrospun biocompatible Chitosan/MIL-101 (Fe) composite nanofibers for solid-phase extraction of Δ9-tetrahydrocannabinol in whole blood samples using Box-Behnken experimental design

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