Enhancing extraction rate in solid‐phase microextraction by using nano‐structured polyaniline coating

Mehdinia, Ali; Mousavi, Mir F.

doi:10.1002/jssc.200800284

Cited by 60 publications

(22 citation statements)

References 33 publications

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“…The higher the current density is, the greater the polarization potential is. The PANIs synthesized during this potential range get emeraldine structure …”

Section: Resultsmentioning

confidence: 99%

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

Xiong

et al. 2014

J of Applied Polymer Sci

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Polyaniline (PANI) with high crystallinity degree was facilely synthesized on the surface of stainless steel net by galvanostatic method. The effect of polymerization current density on the characteristics of morphology and structure had been investigated by field emission scanning electron microscopy (FE-SEM), Fourier transforms infrared (FTIR), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). FE-SEM observations disclosed that PANI was deposited as nanofibers and their diameters decreased with the polymerization current density. FTIR studies revealed that degree of oxidation increased in order PANI-2 < PANI-6 < PANI-10. XPS measurements displayed that PANI polymerized at 6 mA cm 22 (PANI-6) exhibited much higher doping level of 77.8%, which favored the conductivity. XRD analysis discovered that the obtained PANI showed high crystallinity degree in which PANI-6 possessed highest crystallinity degree (X cr ) up to 67%. Electrochemical performances of PANI as electrode materials were studied via cyclic voltammetry. The results presented that PANI-6 possessed greater discharge capacity and better reversibility.In this study, PANI with high crystallinity degree was synthesized by galvanostatic method on the basis of several points of view: the production is purer and more homogeneous, the devices are facile, and different thickness films could be obtained by controlling polymerization time and/or current density. The data about its spectral properties, structure, conductivity, and electrochemical properties were presented. The effect of polymerization current density on the structure, degree of oxidation (DO), doping level (DL), and crystallinity degree was investigated. The relationship between structure and electric properties was discussed. EXPERIMENTAL ReagentsAniline (C 6 H 7 N, analytical grade from Xi'an Chemical Industry, China) was distilled under reduced pressure before use.

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“…The higher the current density is, the greater the polarization potential is. The PANIs synthesized during this potential range get emeraldine structure …”

Section: Resultsmentioning

confidence: 99%

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

Xiong

et al. 2014

J of Applied Polymer Sci

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“…Among the many conducting polymers, polypyrrole and its derivatives have become one of the most broadly used and extensively studied classes of conducting polymers because: (1) they can be easily polymerized from organic or aqueous media at neutral pH by electrochemical or chemical methods, (2) they are relatively stable in air and solution, and (3) pyrrole monomer and some of its derivatives are available commercially. Moreover, the latest report is on the use of nanostructures coating in the fabrication of fibers [14,15]. The nano-structured coating involves a high surface-tovolume ratio, which improves the extraction efficiency [16].…”

Section: Introductionmentioning

confidence: 98%

A Sensitive Method for the Determination of Methadone in Biological Samples Using Nano-Structured α-Carboxy Polypyrrol as a Sorbent of SPME

et al. 2012

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Nano-structured a-carboxy polypyrrol (PPy-a-COOH) was used as a coating of solid-phase microextraction (SPME) fiber to increase the extraction efficiency of headspace solid phase microextraction (HS-SPME) of methadone (MDN) in biological samples. The carboxyendcapped polypyrrole film was prepared via electrochemical deposition on a platinum wire. A nano-fibrous structure of PPy-a-COOH with a diameter of 120 nm was obtained. The porous surface structure of the film, revealed by scanning electron microscopy, provided high surface areas and allowed for high extraction efficiency of methadone. Then the analysis of the extracts was carried out by a gas chromatography-flame ionization detector. In order to achieve maximum extraction efficiency, different parameters affecting the extraction conditions were optimized. Under the optimized conditions, the limit of detections and the limit of quantifications of the method in the range of 0.02-0.035 and 0.06-0.10 lg L -1 were obtained for different matrices. The relative recoveries in different samples were in the range of 95-97%. Finally, the feasibility of the proposed method was successfully confirmed by extraction and determination of MDN in human urine and plasma samples in the range of microgram per liter, and suitable results were obtained (RSDs \5.3%).

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“…Compared with other materials used for SPME, nano-materials offer a significant higher surface area-to-volume ratio that promises much greater extraction capacity and efficiency [35]. Fibers with nano-structured coatings greatly can increase effective surface area, and consequently extraction capacity [36].…”

Section: Introductionmentioning

confidence: 99%

Preparation and evaluation of solid-phase microextraction fiber based on nano-structured copolymer of aniline and m-amino benzoic acid coating for the analysis of fatty acids in zooplanktons

Mehdinia

Asiabi

Jabbari

et al. 2010

Journal of Chromatography A

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Enhancing extraction rate in solid‐phase microextraction by using nano‐structured polyaniline coating

Cited by 60 publications

References 33 publications

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

Polyaniline with high crystallinity degree: Synthesis, structure, and electrochemical properties

A Sensitive Method for the Determination of Methadone in Biological Samples Using Nano-Structured α-Carboxy Polypyrrol as a Sorbent of SPME

Preparation and evaluation of solid-phase microextraction fiber based on nano-structured copolymer of aniline and m-amino benzoic acid coating for the analysis of fatty acids in zooplanktons

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