Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1216, Issue 9, Pages 1305-1311Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2008.12.082
Keywords
Solid-phase microextraction; Electrophoretic deposition; Single-walled carbon nanotubes; Phenols
Funding
- National Natural Science Foundation of China [20607017]
- Natural Science Foundation of Fujian Province of China [D0610018]
- Xiamen University
Ask authors/readers for more resources
A novel solid-phase microextraction (SPME) Pt fiber coated with single-walled carbon nanotubes (SWC-NTs) was prepared by electrophoretic deposition (EPD) and applied to the determination of phenols in aqueous samples by direct immersion (DI)-SPME-HPLC-UV. The results revealed that EPD was a simple and reproducible technique for the preparation of SPME fibers coated with SWCNTs without the use of adhesive. The obtained SWCNT coating did not swell in organic solvents nor strip off from substrate, and possessed high mechanical strength due to the strong Van der Waals attractions between the surfaces of the SWCNTs. The prepared SPME fiber was conductive since both SWCNT coating and Pt wire were conductive. Using Pt wire as substrate, the fiber was unbreakable. Owing to the presence of oxygenated groups on SWCNTs and the high surface area of SWCNTs, the SWCNT fiber was similar to or superior to commercial PA fiber in extracting the studied phenols from aqueous sample. A durability of more than 80 analyses was achieved for one unique fiber. Under optimized conditions, the detection limits for the phenols varied between 0.9 and 3.8 ng/mL, the precisions were in the range of 0.7-3.2% (n =3), and linear ranges were within 10 and 300 ngJmL. The method was successfully applied to the analysis of spiked seawater and tap water samples with the recoveries from 87.5 to 102.0%. (C) 2009 Elsevier B.V. All rights reserved.
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