• 文献标题:   Modification of a steel fiber with a graphene based bucky gel for headspace solid-phase microextraction of volatile aromatic hydrocarbons prior to their quantification by GC
  • 文献类型:   Article
  • 作  者:   YOUSEFI SM, SHEMIRANI F, GHORBANIAN SA
  • 作者关键词:   fiber fabrication, btex, soft material, ionic liquid, carbon nanomaterial, nanofluid, physical deposition, urine sample
  • 出版物名称:   MICROCHIMICA ACTA
  • ISSN:   0026-3672 EI 1436-5073
  • 通讯作者地址:   Univ Tehran
  • 被引频次:   3
  • DOI:   10.1007/s00604-018-3017-x
  • 出版年:   2018

▎ 摘  要

A graphene based bucky gel-coated stainless steel fiber was prepared and applied to headspace solid phase microextraction of volatile organic compounds. Graphene was mixed with an ionic liquid to produce a bucky gel that displays the attractive features of both compounds. It can be directly deposited on an etched stainless steel wire to give the fiber for use in extraction of benzene, toluene, ethylbenzene and xylene (BTEX) isomers. The presence of graphene favors the -interaction between the sorbent and aromatic analytes. The sorbent is thermally stable up to 300 degrees C and can be used more than 50 times. It was characterized by field emission scanning electron microscopy, FT-IR spectroscopy and thermogravimetric analysis. Under optimized conditions, linear responses were found in the range of 0.11-5000gL(-1) for toluene, 0.15-5000 for benzene and o-xylene, 0.17-5000 for m- andp-xylene and 0.20-5000 for ethylbenzene. Limits of detection are between 0.03 and 0.06gL(-1) (at an S/N ratio of 3). The run-to-run RSDs are <5.8% (for n=6), and fiber-to-fiber RSDs are 4.1-9.2% (n=4). The method was successfully applied to the extraction of BTEX isomers in spiked urine samples and gave recoveries between 88 and 105%.