• 文献标题:   Microextraction in packed syringe by using a three-dimensional carbon nanotube/carbon nanofiber-graphene nanostructure coupled to dispersive liquid-liquid microextraction for the determination of phthalate esters in water samples
  • 文献类型:   Article
  • 作  者:   AMIRI A, GHAEMI F
  • 作者关键词:   gas chromatography, scanning electron microscopy, transmission electron microscopy, chemical vapor deposition, threedimensional nanostructure, brunaueremmettteller adsorption
  • 出版物名称:   MICROCHIMICA ACTA
  • ISSN:   0026-3672 EI 1436-5073
  • 通讯作者地址:   Hakim Sabzevari Univ
  • 被引频次:   8
  • DOI:   10.1007/s00604-017-2416-8
  • 出版年:   2017

▎ 摘  要

Microextraction in packed syringe (MEPS) was combined with dispersive liquid-liquid microextraction (DLLME) for the extraction of phthalate esters (PEs) from water samples prior to their determination by GC with flame ionization detection. A three-dimensional nanomaterial composed of carbon nanotubes, carbon nanofibers and graphene was prepared by chemical vapor deposition (CVD) and employed as a sorbent for MEPS. The porous structure of the sorbent has been revealed by scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller adsorption. The effects of various experimental variables on the extraction efficiencies of the following PEs were studied: Dimethyl phthalate, diethyl phthalate, diisobutyl phthalate, di-n-butyl phthalate, and di-2-ethylhexyl phthalate. After extraction, the GC assay gives a linear calibration plot that covers the 0.02 to 200 ng mL(-1) PE concentration ranges. The method displays detection limits (at an S/N ratio of 3) in the range from 1 to 10 ng mL(-1). Relative standard deviations for intra-day and inter-day precision are between 5.7 and 8.9%, and between 7.6 and 10.1%, respectively. The feasibility of the method was demonstrated by extracting and determining PEs in (spiked) real water samples, whereby recoveries in the range of 90.3-98.8% and RSD% lower than 10.3% were attained.