Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (2): 218-226.DOI: 10.11944/j.issn.1000-0518.2020.02.190235

• Full Papers • Previous Articles     Next Articles

Fabrication of Solid Phase Microextraction Fibers of Titanium Wires and Its Application

MA Mingguang,WEI Yunxia()   

  1. College of Chemistry and Chemical Engineering,Lanzhou City University,Lanzhou 730070,China
  • Received:2019-09-03 Accepted:2019-11-20 Online:2020-02-01 Published:2020-02-06
  • Contact: WEI Yunxia
  • Supported by:
    Supported by the Science and Technology Program of Gansu Province(No.18JR3RA219), and the Ph.D. Research Initiation Fund of Lanzhou City College(No.LZCU-BS2018-29)

Abstract:

In this article, solid phase microextraction (SPME) fibers were assembled by in situ anodization on the surface of titanium wire with a constant voltage and anodization time. Effect of the electrolyte solutions of different concentrations (concentration of NH4F and ethylene glycol) and electrolysis time on the formation and size of TiO2 nanotubes (TiO2NTs) was investigated. TiO2NTs arrays were arranged with the wall thickness of 25 nm and the pore diameter of 100 nm in ethylene glycol and water (volume ratio 1:1) containing 0.5% mass fraction of NH4F at 20 V for 30 min at 25 ℃. Development of titanium dioxide nanotube array as a fiber coating for solid-phase microextraction coupled to high performance liquid chromatography for sensitive determination of polycyclic aromatic hydrocarbons (PAHs) in water. Under the optimized SPME conditions, this method has a higher sensitivity, wider linear range, better selectivity and repetition, and was easier to operate. The proposed method was successfully applied to the preconcentration and determination of target PAHs in river water and wastewater samples with satisfactory analytical results.

Key words: titanium dioxide nanotube, assemble, solid phase microextraction, polycyclic aromatic hydrocarbons