Solid-phase microextraction of phthalate esters from aqueous media by electrochemically deposited carbon nanotube/polypyrrole composite on a stainless steel fiber

Asadollahzadeh, Hamideh; Noroozian, Ebrahim; Maghsoudi, Shahab

doi:10.1016/j.aca.2010.04.029

Cited by 136 publications

(42 citation statements)

References 47 publications

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“…One of the strategies used to enhance thermal stability of PPY was synthesis multiwalled carbon nanotubes-PPY composite. Compared to PPY, multiwalled carbon nanotubes-PPY composite showed higher thermal stability and charge delocalization properties [21,22]. Also, the changing of synthesis medium from aqueous to organic medium led to enhance thermal stability of PPY fibers [23].…”

Section: Introductionmentioning

confidence: 92%

A strategy to enhance the thermal stability of a nanostructured polypyrrole-based coating for solid phase microextraction

et al. 2012

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We report on a nanostructured self-doped polypyrrole (SPPy) film that was prepared by an electrochemical technique in an electrolyte containing fluorosulfonic acid as the sulfonation reagent. The film was applied as a new fiber material for solid-phase microextraction (SPME) of the pesticides lindane, heptachlor, aldrin, endosulfans I and II prior to their quantitation by GC with electron capture detection. The SPPy nanoparticles have a diameter of <100 nm. The introduction of covalently bound sulfo groups into the backbone of the polymer resulted in improved temperature resistance (~350°C) and satisfactory extraction efficiency. The thermal stability of the SPPy fiber is superior to common polypyrrole fibers. Extraction 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 method displays good repeatability (RSD<6%) and linearity (in the range from 0.78 to 100 ng mL −1 ; with an R 2 of >0.998. The detection limits are <0.23 ng mL −1 . The method was successfully applied to the analysis of the pesticides in skimmed milk and fruit juice samples, and recoveries are from 84±1 to 105±1%.

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Section: Introductionmentioning

confidence: 92%

A strategy to enhance the thermal stability of a nanostructured polypyrrole-based coating for solid phase microextraction

et al. 2012

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“…Compared to those obtained by HPLC (0.15 ng/mL) (Li, Cai, Shi, Mou, & Jiang, 2008); GC-MS (0.10 ng/mL) (Yuan, Liu, Liao, & Chang, 2002); SPME-GC (0.08 ng/mL) (Asadollahzadeh, Noroozian, & Maghsoudi, 2010) and previous immunoassay methods (97 ng/L) (Ius et al, 1993); (200 ng/mL) (Goda et al, 2000), the LOD of this assay (0.01 ng/mL) is lower. In the immunoassay, the sensitivity was expressed by IC 50 value, the lower of the IC 50 value, the higher sensitivity of the assay would be (Wang et al, 2009).…”

Section: Discussionmentioning

confidence: 55%

A highly sensitive enzyme-linked immunosorbent assay for the detection of dipropyl phthalate in plastic food contact materials

Zhang¹,

Hu²,

Liu³

et al. 2013

Food and Agricultural Immunology

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A highly sensitive and specific direct competitive enzyme-linked immunosorbent assay has been developed for the detection of dipropyl phthalate (DPrP) based on antibody-coating format. The specific polyclonal antibodies against DPrP raised in rabbits. The conjugates of the antigen with horseradish peroxidase (HRP) were used as the detectable probe. Under the optimal conditions, the limit of detection of the method was 0.01 ng/mL, and a good quantitative working range of 0.01Á16 ng/mL (R 2 00.995) was obtained. The cross-reactivities of four structurally related phthalate esters were below 12% and did not interfere significantly the analysis of DPrP. The accuracy of the immunoassay has been evaluated and validated by analyzing real and spiked leachate from plastic food contact materials. The recoveries of DPrP ranged from 85.9% to 109.4%. This developed dc-ELISA was reliable, accurate and highly sensitive.

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“…The IC 50 values were calculated to be 17.12, 20.42, 22.28, 47.86, 43.65, 38.9, 102.57 and 64.57 ng mL À1 , and the LODs were 0.013, 0.013, 0.012, 0.042, 0.035, 0.021, 0.017 and 0.016 ng mL À1 for DMP, DEP, DBP, DEHP, DnOP, BBP, DCHP and DNP, respectively. Compared with instrumental analysis, the LOD of DBP in aqueous sample was 0.07 ng mL À1 by gas chromatography separation and ame ionization detection using a solid phase micro-extraction cleanup, 38 while that of DEHP in river surface water was 9.3 ng mL À1 by GC-MS; 39 thus, our method has a higher sensitivity. 22 It can be seen that besides DMP, DnOP and DBP, the other ve PAEs also have lower LODs with the polyclonal antibody prepared in this study.…”

Section: Optimization Of Elisa Conditionsmentioning

confidence: 89%

Synthesis of an artificial antigen and preparation of a polyclonal antibody for the sensitive determination of phthalate esters by enzyme-linked immunoassay

Tang

Wei

et al. 2015

Anal. Methods

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In this study, two generic haptens of phthalate esters (PAEs) were synthesized by introducing spacer arms with different lengths at the meta-position of an ester group of dimethyl phthalate (DMP). Immune and coating antigens were prepared by coupling the haptens with bovine serum albumin (BSA) and ovalbumin (OVA), respectively. Polyclonal antibodies against two immunogens were obtained, and their sensitivities and specificities were examined by enzyme-linked immunosorbent assay (ELISA). Under the optimal experimental conditions, the IC 50 values of eight PAEs were obtained in the range of 17.12-102.57 ng mL À1 with the limits of detection (LODs) around 0.012-0.042 ng mL À1 . The prepared polyclonal antibody with a higher titer displayed a broad cross-reactivity in the range of 16.69-83.84%for the other seven PAEs (except DMP). The average recoveries of PAEs at the spiked levels of 0.5, 1.0 and 10.0 ng mL À1 ranged from 63.9% to 103.6% with relative standard deviations (RSDs) below 11.32%, which was consistent with gas chromatography-mass spectrometry (GC-MS). The developed ELISA method was successfully applied to determine multiple PAEs in greenhouse soils.

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Solid-phase microextraction of phthalate esters from aqueous media by electrochemically deposited carbon nanotube/polypyrrole composite on a stainless steel fiber

Cited by 136 publications

References 47 publications

A strategy to enhance the thermal stability of a nanostructured polypyrrole-based coating for solid phase microextraction

A strategy to enhance the thermal stability of a nanostructured polypyrrole-based coating for solid phase microextraction

A highly sensitive enzyme-linked immunosorbent assay for the detection of dipropyl phthalate in plastic food contact materials

Synthesis of an artificial antigen and preparation of a polyclonal antibody for the sensitive determination of phthalate esters by enzyme-linked immunoassay

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