Evaluation of a new method for chemical coating of aluminum wire with molecularly imprinted polymer layer. Application for the fabrication of triazines selective solid-phase microextraction fiber

Djozan, Djavanshir; Ebrahimi, Bahram; Mahkam, Mehrdad; Farajzadeh, Mir Ali

doi:10.1016/j.aca.2010.06.006

Cited by 113 publications

(46 citation statements)

References 33 publications

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“…This highlights the usefulness of projection techniques not only to handle the data but also to optimize the sensing performance. The performance of SERS-based detection is competitive with a few works in the literature for detection of pesticides in real samples, most of them based on extraction and size exclusion methods in chromatography techniques [8,[34][35][36]. Koeber et al were able to detect triazine herbicides in river samples with a detection limit of 3.3 9 10 -10 mol/L for simazine by combining column size exclusion and adsorption chromatography [31].…”

Section: Probing Trace Levels Of Prometryn In Deionized and Tap Watermentioning

confidence: 95%

Probing trace levels of prometryn solutions: from test samples in the lab toward real samples with tap water

et al. 2015

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Growing food demand has been addressed by protecting crops from insects, weeds, and other organisms by increasing the application of pesticides, thus increasing the risk of environmental contamination. Many pesticides, such as the triazines, are poorly soluble in water and require trace detection methods, which are normally achieved with high-cost sophisticated chromatography techniques. Here, we combine surface-enhanced Raman scattering (SERS) with multidimensional projection techniques to detect the toxic herbicide prometryn in ultrapure, deionized, and tap waters. The SERS spectra for prometryn were recorded with good signal-to-noise ratio down to 5 9 10 -12 mol/L in ultrapure water, approaching singlemolecule levels, and 5 9 10 -9 mol/L in tap water. The latter is one order of magnitude below the threshold allowed for drinking water. In addition to providing a fingerprint of prometryn molecules at low concentrations, SERS is advantageous compared to other methods since it does not require pretreatment or chemical separation. The multidimensional projection methods and the detection procedure with SERS are entirely generic, and may be extended to any other pesticide or water contaminants, thus allowing environmental control to be potentially low cost if portable Raman spectrophotometers are used.

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Section: Probing Trace Levels Of Prometryn In Deionized and Tap Watermentioning

confidence: 95%

Probing trace levels of prometryn solutions: from test samples in the lab toward real samples with tap water

et al. 2015

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“…Due to the salting-out effect for hydrophobic compounds, it is a common practice to add salt to aqueous samples to increase the ionic strength of the sample solution and enhance partition of organic analytes between fiber coating and aqueous phase [23,34]. The effect of salt was examined by adding NaCl in the range of 0-20% (w/v).…”

Section: Effect Of Ionic Strengthmentioning

confidence: 99%

“…Solid-phase micro-extraction (SPME) is a very simple and efficient solventless sample preparation method, which integrates sampling, extraction, concentration and sample introduction into a single step [19,21,22]. This technique has been widely used in different fields including the analysis of environmental, food, natural products, pharmaceuticals, and forensic samples [23,24]. Although a number of commercial SPME fibers are available for the determination of some OPEs from aqueous samples [15,25], they are generally expensive, and suffered from several drawbacks such as lack of selectivity, short life span, low thermal and chemical stability, and fragility.…”

Section: Introductionmentioning

confidence: 99%

Tris(pentafluoroethyl)trifluorophosphate-basd ionic liquids as advantageous solid-phase micro-extraction coatings for the extraction of organophosphate esters in environmental waters

Shi

Liu

Liang

et al. 2016

Journal of Chromatography A

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a b s t r a c tIonic liquids (ILs) containing the tris(pentafluoroethyl)trifluorophosphate [FAP] anion and various cations have great potential in sample preparation because of their excellent hydrophobicity, thermostability and low hydrolysity. In the present study, a [FAP]-based IL, 1-hexyl-3-methylimidazolium tris (pentafluoroethyl) trifluoro phosphate ([HMIM][FAP]), was used as coatings of solid-phase microextraction (SPME) for extracting organophosphate esters (OPEs) from environmental water samples. This SPME fiber was fabricated by coating a stainless steel wire substrate with [HMIM][FAP] via a simple direct dip-coating approach, and the extraction was conducted by the direct immersion solid phase microextraction. Coupling to gas chromatography mass spectrometry (GC-MS), the developed SPME method exhibited excellent selectivity and sensitivity towards the extraction of 11 OPEs from aqueous samples. Satisfactory linearity (R 2 ≥ 0.99) of the calibration curves was obtained over the range of 0.05-50.0 ng mLwith the limits of detection (LODs, S/N = 3) and limits of quantification (LOQs, S/N = 10) ranged from 0.13-7.40 ng L −1 and 0.50-24.0 ng L −1 , respectively. The proposed SPME method showed excellent extraction efficiency to OPEs with enrichment factors in the range of 168-2603, and acceptable reproducibility with relative standard deviations (RSDs) ≤15% for single fiber (n = 7) and ≤16% for fiber-to-fiber (n = 3 × 3) at a concentration level of 0.5 ng mL −1 , respectively. The prepared IL-based fiber was successfully applied to determine eleven common used OPEs in tap water, influent and effluent of sewage treatment plant, with results are comparable to those determined by the reference (UPLC-MS/MS), and spiked recoveries in the range of 84.0-108%, 82.1-123% and 82.8-100%, respectively.

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“…For example, an SPME fiber was fabricated through ultraviolet irradiation polymerization of ametryn-MIPs on the surface of anodized-silylated aluminum wire [114]. In order to investigate the extraction mechanism, four fibers were used for comparison, including cleaned aluminum wire, anodized aluminum wire, anodized and silylated aluminum wire, and anodized and silylated aluminum wire coated with a MIP layer.…”

Section: Solid-phase Microextraction Matrix Solid-phase Dispersion Amentioning

confidence: 99%

“…Table 2 summarizes some new applications of MIPs as SPSs in the three extraction methods. For SPME, the MIPs are usually coated on a fiber segment, and then the fiber is inserted into the SPME device for the extraction [111][112][113][114][115][116][117][118][119][120][121][122][123][124][125][126]. Sometimes, nanomaterials can be combined with MIPs in order to modify the extraction efficiency {e.g., CNTs [112,117]}.…”

Section: Solid-phase Microextraction Matrix Solid-phase Dispersion Amentioning

confidence: 99%

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

Wen

Chen

et al. 2014

TrAC Trends in Analytical Chemistry

342

123

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A B S T R A C TSample preparation is a crucial bottleneck in the whole analytical process. Solid-phase sorbents (SPSs) have aroused increasing interest in research on sample preparation, as they have key roles in obtaining high clean-up and enrichment efficiency in the analysis of trace targets present in complex matrices. The objective of this review is to provide a broad overview of the recent advances and applications of SPSs in sample preparation prior to chromatographic analysis, during the period 2008-13. We include SPSs, such as molecularly-imprinted polymers, carbon nanomaterials, metallic nanoparticles and metal organic frameworks, focusing on solid-phase extraction, solid-phase microextraction, matrix solid-phase dispersion and stir-bar sorptive extraction of typical pollutants in environmental, biological, food and pharmaceutical samples. We propose remaining challenges and future perspectives to improve development of new SPSs and to apply them further.

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Evaluation of a new method for chemical coating of aluminum wire with molecularly imprinted polymer layer. Application for the fabrication of triazines selective solid-phase microextraction fiber

Cited by 113 publications

References 33 publications

Probing trace levels of prometryn solutions: from test samples in the lab toward real samples with tap water

Probing trace levels of prometryn solutions: from test samples in the lab toward real samples with tap water

Tris(pentafluoroethyl)trifluorophosphate-basd ionic liquids as advantageous solid-phase micro-extraction coatings for the extraction of organophosphate esters in environmental waters

Recent advances in solid-phase sorbents for sample preparation prior to chromatographic analysis

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