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Preparation of magnetite/multiwalled carbon nanotubes/metal-organic framework composite for dispersive magnetic micro solid phase extraction of parabens and phthalate esters from water samples and various types of cream for their determination with liquid chromatography.

Authors
  • Jalilian, Niloofar1
  • Ebrahimzadeh, Homeira2
  • Asgharinezhad, Ali Akbar1
  • 1 Faculty of Chemistry and Petroleum Sciences, Shahid Beheshti University, G.C., Evin, Tehran, Iran. , (Iran)
  • 2 Faculty of Chemistry and Petroleum Sciences, Shahid Beheshti University, G.C., Evin, Tehran, Iran. Electronic address: [email protected] , (Iran)
Type
Published Article
Journal
Journal of chromatography. A
Publication Date
Dec 20, 2019
Volume
1608
Pages
460426–460426
Identifiers
DOI: 10.1016/j.chroma.2019.460426
PMID: 31416622
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

In the current study, [email protected](Cr) (Fe3O4/multiwalled carbon nanotubes/MIL-101(Cr)) was synthesized and utilized as a new sorbent for the first time. It was employed successfully for the extraction of parabens and phthalate esters (PEs) from water and cream samples prior to their quantification with HPLC-DAD. The prepared metal-organic-framework (MOF) was characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX), EDX mapping, thermogravimetric analysis (TGA), vibrating-sample magnetometer (VSM) and X-ray powder diffraction (XRD). Three phthalate esters (dimethyl phthalate (DMP), diethyl phthalate (DEP), diallyl phthalate (DAP)) and two parabens (methylparaben (MP) and butylparaben (BP)) were chosen as model analytes. Several experimental factors affecting the extraction efficiency, including pH value, nanosorbent amount, sorption time, salt concentration, sample volume, type and volume of the eluent, and elution time were investigated. The optimization of the extraction method was carried out by response surface methodology (RSM) and desirability function (DF) approach. Under the opted conditions, the method was linear in the range of 0.1-1500 μg L-1 with coefficients of determination > 0.9991. The limits of detection of PEs and parabens were found in the range of 0.03-0.15 μg L-1 (S/N = 3). The relative standard deviations were less than 7.5% and the extraction recoveries ranged from 38.04 to 70.62%. The present method was simple, rapid, inexpensive and environmentally friendly and was successfully utilized for the determination of PEs and parabens in water samples and various types of cream samples with satisfactory results. Copyright © 2019 Elsevier B.V. All rights reserved.

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