Novel liquid–liquid–solid microextraction method with molecularly imprinted polymer-coated stainless steel fiber for aqueous sample pretreatment

Hu, Xiaogang; Ye, Tingting; Yu, Ying; Cao, Ya; Guo, Changlei

doi:10.1016/j.chroma.2011.04.069

Cited by 27 publications

(7 citation statements)

References 18 publications

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“…Thus, the recognition sites on both the surface and inner part of the MIP fiber could be used to affinity separate the analytes. 14,15 The FT-IR spectra (KBr pellet) of the prepared MIP, NIP coatings of olivetol, the monomer (MAA), the crosslinker (EDMA) and olivetol were comparably shown in Fig. 2.…”

Section: Results and Discussion Characterization Of Mips And Nipsmentioning

confidence: 99%

Rapid Preparation of Monolithic Molecular Imprinted Polymer Fiber for Solid Phase Microextraction by Microwave Irradiation

Jin

Chen

Liu

et al. 2013

J Chinese Chemical Soc

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In this paper, a simple, fast and in situ polymerization strategy to prepare monolithic molecularly imprinted polymer (MIP) fibers for solid phase microextraction (SPME) is developed using silica capillaries as molds. With the help of microwave irradiation, polymerization was carried out in 5.5 min using olivetol as a template molecular, a-methacrylic acid (MAA) as a functional monomer and ethylene dimethacrylate (EDMA) as a crosslinker, toluene and dodecanol as the binary porgens. The resulted MIP fibers were finally obtained after silica being etched away with a controlled length, and subsequently characterized by scanning electron microscope (SEM) and Fourier transform infrared absorption spectroscopy (FT-IR). Under the optimal extraction conditions, a simple method based on the coupling of MIP SPME with high performance liquid chromatography (HPLC) was used for the selective determination of the model mixtures of olivetol, phenol and m-toluidine in lake water and wheat bran samples. The recoveries of olivetol, phenol and m-toluidine for both samples were in the range of 87.3-93.6%, 21.4-27.2%, 18.9-24.8% at three spiked levels, respectively, demonstrating that higher extraction and the specific absorption occurred between the template molecule and the prepared MIP fiber.

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Section: Results and Discussion Characterization Of Mips And Nipsmentioning

confidence: 99%

Rapid Preparation of Monolithic Molecular Imprinted Polymer Fiber for Solid Phase Microextraction by Microwave Irradiation

Jin

Chen

Liu

et al. 2013

J Chinese Chemical Soc

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“…The analytical figure of merits for monitoring of butachlor in distilled water, waste water, and urine samples is summarized in Table . Supporting Information Table S1 provides a comparison between the proposed sample preparation methods and previously published articles .…”

Section: Resultsmentioning

confidence: 99%

Efficient sample preparation method based on solvent-assisted dispersive solid-phase extraction for the trace detection of butachlor in urine and waste water samples

2016

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In this work, an efficient sample preparation method termed solvent-assisted dispersive solid-phase extraction was applied. The used sample preparation method was based on the dispersion of the sorbent (benzophenone) into the aqueous sample to maximize the interaction surface. In this approach, the dispersion of the sorbent at a very low milligram level was achieved by inserting a solution of the sorbent and disperser solvent into the aqueous sample. The cloudy solution created from the dispersion of the sorbent in the bulk aqueous sample. After pre-concentration of the butachlor, the cloudy solution was centrifuged and butachlor in the sediment phase dissolved in ethanol and determined by gas chromatography with flame ionization detection. Under the optimized conditions (solution pH = 7.0, sorbent: benzophenone, 2%, disperser solvent: ethanol, 500 μL, centrifuged at 4000 rpm for 3 min), the method detection limit for butachlor was 2, 3 and 3 μg/L for distilled water, waste water, and urine sample, respectively. Furthermore, the preconcentration factor was 198.8, 175.0, and 174.2 in distilled water, waste water, and urine sample, respectively. Solvent-assisted dispersive solid-phase extraction was successfully used for the trace monitoring of butachlor in urine and waste water samples.

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“…Molecularly imprinted polymers (MIPs) are highly cross‐linked, porous, and tailored for template molecules . MIPs combine many advantages, including predetermined selectivity, high chemical and physical stabilities, good preparation convenience, and long service life .…”

Section: Introductionmentioning

confidence: 99%

Molecularly imprinted polymeric stir bar: Preparation and application for the determination of naftopidil in plasma and urine samples

Peng

Xiao

et al. 2016

J of Separation Science

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In this study, molecularly imprinting technology and stir bar absorption technology were combined to develop a microextraction approach based on a molecularly imprinted polymeric stir bar. The molecularly imprinted polymer stir bar has a high performance, is specific, economical, and simple to prepare. The obtained naftopidil-imprinted polymer-coated bars could simultaneously agitate and adsorb naftopidil in the sample solution. The ratio of template/monomer/cross-linker and conditions of template removal were optimized to prepare a stir bar with highly efficient adsorption. Fourier transform infrared spectroscopy, scanning electron microscopy, selectivity, and extraction capacity experiments showed that the molecularly imprinted polymer stir bar was prepared successfully. To utilize the molecularly imprinted polymer stir bar for the determination of naftopidil in complex body fluid matrices, the extraction time, stirring speed, eluent, and elution time were optimized. The limits of detection of naftopidil in plasma and urine sample were 7.5 and 4.0 ng/mL, respectively, and the recoveries were in the range of 90-112%. The within-run precision and between-run precision were acceptable (relative standard deviation <7%). These data demonstrated that the molecularly imprinted polymeric stir bar based microextraction with high-performance liquid chromatography was a convenient, rapid, efficient, and specific method for the precise determination of trace naftopidil in clinical analysis.

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Novel liquid–liquid–solid microextraction method with molecularly imprinted polymer-coated stainless steel fiber for aqueous sample pretreatment

Cited by 27 publications

References 18 publications

Rapid Preparation of Monolithic Molecular Imprinted Polymer Fiber for Solid Phase Microextraction by Microwave Irradiation

Rapid Preparation of Monolithic Molecular Imprinted Polymer Fiber for Solid Phase Microextraction by Microwave Irradiation

Efficient sample preparation method based on solvent-assisted dispersive solid-phase extraction for the trace detection of butachlor in urine and waste water samples

Molecularly imprinted polymeric stir bar: Preparation and application for the determination of naftopidil in plasma and urine samples

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