Optimization of solid-phase microextraction of volatile phenols in water by a polyaniline-coated Pt-fiber using experimental design

Mousavi, Mehdi; Noroozian, Ebrahim; Jalali‐Heravi, Mehdi; Mollahosseini, Afsaneh

doi:10.1016/j.aca.2006.08.001

Cited by 83 publications

(35 citation statements)

References 24 publications

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“…The percent of recoveries varied between 88 to 103%. The characteristics performance of this method was compared with other methods in Table 7, which indicated that the detection limits and the linear ranges found in the present work are comparable with the ones found by other researchers who used the SPME [30,31] or SHS [32,33] for analysis.…”

Section: Real Samples Analysissupporting

confidence: 72%

Chemometrics Optimization of Volatile Organic Compounds Analysis in Water by Static Headspace Gas Chromatography Mass Spectrometry

Fatemi

Kouchakpour²,

Malekzadeh³

2013

Hydrol Current Res

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Static headspace coupled with gas chromatography-mass spectrometry was applied to extraction and analysis of volatile organic compounds in water samples. The effects of various factors affecting on the extraction efficiency including: the extraction temperature, extraction time, salt concentration and stirring speed were carried out by means of a 2 4 full factorial design. It was found that the effects of extraction temperature and salt concentration were significant. Then, a central composite design was performed to optimize the level of these factors. The optimal headspace conditions were achieved when the vials were heated under 88°C and 29% w/w addition of salt. At optimum operating conditions, analytical figures of merit of method such as linearity (0.9962-0.9996), repeatability (1.2-12.13%), detection limits (0.1-4.9 μg.L −1 ) and linearity dynamic range (10-1000 μg.L −1 ) were determined. The proposed methods can be used to direct investigation of the presence of Volatile organic compounds in environmental samples without pre-treatment of samples. Finally the optimized method was used to investigate the existence of volatile organic compounds in Babolroud River in the north of Iran.

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Section: Real Samples Analysissupporting

confidence: 72%

Chemometrics Optimization of Volatile Organic Compounds Analysis in Water by Static Headspace Gas Chromatography Mass Spectrometry

Fatemi

Kouchakpour²,

Malekzadeh³

2013

Hydrol Current Res

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“…It was proved that there was no obvious decline of the extraction efficiency after more than 60 times of adsorption/desorption cycle for the proposed coating without any effect matrix. Although, the lifetime of the common PT coatings is short [8], but specific SPT coatings with long lifetime was obtained with some modification of the synthesis method [27][28][29][30]. The SPT coating was still stable and reusable.…”

Section: Life Time Of the Sptmentioning

confidence: 99%

Preparation and evaluation of thermally stable nano‐structured self‐doped polythiophene coating for analysis of phthalate ester trace levels

Mehdinia

Bashour

Roohi

et al. 2012

J of Separation Science

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Nano-structured self-doped polythiophene (SPT) electrodeposited in the presence of fluorinated organic acid was applied as a thermally stable conductive polymer-based solid-phase microextraction (SPME) fiber candidate. Quantitative determination of trace levels of phthalate esters including dimethyl phthalate (DMP), diethyl phthalate (DEP), dibutyl phthalate (DBP), and diethylhexyl phthalate (DEHP) was carried out using this novel fiber, coupling with gas chromatography-flame ionization detector (GC-FID). The SPT coating was proved to be stable at high temperatures (∼350°C) with a high extraction capacity and long lifetime (more than 60 times). Improved temperature resistance was obtained by the presence of sulfonated groups in the backbone of polymer. Thermal stability of novel SPT was superior to common polythiophene (synthesized in LiClO(4) ). The extraction procedure was optimized by means of the Taguchi orthogonal array experimental design with an OA(16) (4(5) ) matrix including extraction temperature, extraction time, salt concentration, stirring rate, and headspace volume. The good linearity was obtained for most compounds with correlation coefficients (R(2) ) of between 0.993 and 0.995. The detection limits were lower than 0.12 ng/mL for dimethyl phthalate, DEP, dibutyl phthalate, and diethylhexyl phthalate. The method was successfully applied to the analysis of water samples with the recoveries from 90±1 to 107±1%.

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“…Recently, many studies dealing with the development of innovative coatings based on the use of sol-gel materials [1][2][3], molecular recognition materials [4][5][6][7] and new unbreakable fibers [8][9][10] have been reported. Serious consideration has also been focused on the use of conducting polymers to be electrodeposited on metal wires as SPME supports [11][12][13]. 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.…”

Section: Introductionmentioning

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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Optimization of solid-phase microextraction of volatile phenols in water by a polyaniline-coated Pt-fiber using experimental design

Cited by 83 publications

References 24 publications

Chemometrics Optimization of Volatile Organic Compounds Analysis in Water by Static Headspace Gas Chromatography Mass Spectrometry

Chemometrics Optimization of Volatile Organic Compounds Analysis in Water by Static Headspace Gas Chromatography Mass Spectrometry

Preparation and evaluation of thermally stable nano‐structured self‐doped polythiophene coating for analysis of phthalate ester trace levels

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

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