TITLE:
Modified Coated Copper Wire as a New Fiber for SPME-GC Analysis of Some Polycyclic Aromatic Hydrocarbons
AUTHORS:
Akram Masoumi, Maryam Abbasian, M. Moharamzadeh, Hossein Salar Amoli
KEYWORDS:
Gas Chromatography, Solid Phase Micro Extraction, Coated Copper Wire, Polycyclic Aromatic Hydrocarbons, Carbon Nanotube
JOURNAL NAME:
Materials Sciences and Applications,
Vol.7 No.6,
June
16,
2016
ABSTRACT: In this study for
the first time, a novel copper Solid Phase Microextraction (SPME) fiber has
been introduced for removal of naphthalene, phenanthrene and anthracene from
aqueous solution. Copper was used as a solid support, which was at first coated
by 3-mercaptopropyltrimethoxysi- lane. A stationary phase of oxidized multi
walled carbon nanotube (MWCNTs)) was bonded to the surface of the copper wire.
The developed SPME was characterized by IR and Scanning Electron Microscopy
(SEM) and coupled to gas chromatography for separation of the analytes.
Stability of the fiber, the effect of coating thickness and recovery time were
optimized. The MWCNTs film thickness was about 5 μm which was perfect for a
rapid mass transfer. The detection limits were at the range of 0.005 to 0.1
μg·L-1. The calibration curves were linear R2 > 0.9813
in the range of 0.01 to 5 μg·L-1. The method has been successfully
applied for real samples with standard addition of 5 μL-1 of each
sample. Stability study of the fiber to acid and alkali shows that it can be
used for more than 50 times.