Journal
MICROCHIMICA ACTA
Volume 181, Issue 5-6, Pages 639-645Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-014-1165-1
Keywords
Polycyclic aromatic hydrocarbons; Polythiophene; Nanocomposite; Solid-phase microextraction; Gas chromatography-mass spectrometry
Categories
Ask authors/readers for more resources
We report on an inorganic-organic hybrid nanocomposite that represents a novel kind of fiber coating for solid-phase microextraction (SPME) of polycyclic aromatic hydrocarbons (PAHs). The material is composed of ZnO nanoparticles, polythiophene and hexagonally ordered silica, and displays good extraction capability due to its nanostructure. The nanocomposite was synthesized by an in-situ polymerization technique, and the ZnO nanoparticles were anchored to the pores in the walls. The ZnO/polythiophene/hexagonally ordered silica (ZnO/PT/SBA-15) nanocomposite was then deposited on a stainless steel wire to obtain the fiber for SPME of PAHs. Optimum conditions include an extraction temperature of 85 A degrees C (for 30 min only), a desorption temperature of 260 A degrees C (for 2 min), and a salt concentration (NaCl) of 20 % (w/v). The detection limits are between 8.2 and 20 pg mL(-1), and the linear responses extend from 0.1 to 10 ng mL(-1). The repeatability for one fiber (for n = 5), expressed as relative standard deviation, is between 4.3 and 9.1 %. The method offers the advantage of being simple to use, rapid, and low-cost (in terms of equipment). The thermal stability of the fiber and high relative recovery (compared to conventional methods) represent additional attractive features.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available