Nano-structured lead dioxide as a novel stationary phase for solid-phase microextraction

Mehdinia, Ali; Mousavi, Mir F.; Shamsipur, Mojtaba

doi:10.1016/j.chroma.2006.08.087

Cited by 123 publications

(49 citation statements)

References 31 publications

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“…Compared with the polymeric coatings, nanomaterials have many excellent properties, such as huge surface area and being mechanically robust and chemically inert. Hence, they added new opportunities for improving the application of SPME fiber coatings [17,18].…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Feng

et al. 2011

J of Separation Science

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A novel chemically bonded graphene oxide/fused-silica fiber was prepared and applied in solid-phase microextraction of six polycyclic aromatic hydrocarbons from water samples coupled with gas chromatography. It exhibited high extraction efficiency and excellent stability. Effects of extraction time, extraction temperature, ionic strength, stirring rate and desorption conditions were investigated and optimized in our work. Detection limits to the six polycyclic aromatic hydrocarbons were less than 0.08 μg/L, and their calibration curves were all linear (R(2)≥0.9954) in the range from 0.05 to 200 μg/L. Single fiber repeatability and fiber-to-fiber reproducibility were less than 6.13 and 15.87%, respectively. This novel fiber was then utilized to analyze two real water samples from the Yellow River and local waterworks, and the recoveries of samples spiked at 1 and 10 μg/L ranged from 84.48 to 118.24%. Compared with other coating materials, this graphene oxide-coated fiber showed many advantages: wide linear range, low detection limit, and good stability in acid, alkali, organic solutions and at high temperature.

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Section: Introductionmentioning

confidence: 99%

Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Feng

et al. 2011

J of Separation Science

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“…The porous nano-structured coating should significantly increase the available surface area of the fiber and therefore increase its extraction capacity [34].…”

Section: Characterization Of Coated Fibersmentioning

confidence: 99%

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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“…Although these commercial fibers have been successfully applied in many fields, some of them still have drawbacks, such as high cost, nonresistance to high temperature and organic solvents, low extraction efficiency (especially for polar and ionic compounds), and selectivity, etc. To overcome these disadvantages, new SPME coatings with remarkable properties have been developed continually using new preparation methods, including direct use of uncoated fibers [8], sol-gel technology [9], epoxy-glued solid sorbents [10], electrochemical modification [11] and physical deposition [12], or new materials [13,14].…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole/graphene composite‐coated fiber for the solid‐phase microextraction of phenols

Zou

Song

et al. 2011

J of Separation Science

114

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A polypyrrole (Ppy)/graphene (G) composite was developed and applied as a novel coating for use in solid-phase microextraction (SPME) coupled with gas chromatography (GC). The Ppy/G-coated fiber was prepared by electrochemically polymerizing pyrrole and G on a stainless-steel wire. The extraction efficiency of Ppy/G-coated fiber for five phenols was the highest compared with the fibers coated with either Ppy or Ppy/graphene oxide (GO) using the same method preparation. Significantly, compared with various commercial fibers, the extraction efficiency of Ppy/G-coated fiber is better than or comparable to 85 μm CAR/PDMS fiber (best extraction efficiency of phenol, o-cresol, and m-cresol in commercial fibers) and 85 μm polyacrylate (PA) fiber (best extraction efficiency of 2,4-dichlorophenol and p-bromophenol in commercial fibers). The effects of extraction and desorption parameters such as extraction time, stirring rate, and desorption temperature and time on the extraction/desorption efficiency were investigated and optimized. The calibration curves were linear from 10 to 1000 μg/L for o-cresol, m-cresol, p-bromophenol, and 2,4-dichlorophenol, and from 50 to 1000 μg/L for phenol. The detection limits were within the range 0.34-3.4 μg/L. The single fiber and fiber-to-fiber reproducibilities were <8.3 (n=7) and 13.3% (n=4), respectively. The recovery of the phenols spiked in natural water samples at 200 μg/L ranged from 74.1 to 103.9% and the relative standard deviations were <3.7%.

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Nano-structured lead dioxide as a novel stationary phase for solid-phase microextraction

Cited by 123 publications

References 31 publications

Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

Graphene oxide bonded fused‐silica fiber for solid‐phase microextraction‐gas chromatography of polycyclic aromatic hydrocarbons in water

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

Polypyrrole/graphene composite‐coated fiber for the solid‐phase microextraction of phenols

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