Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1237, Issue -, Pages 24-29Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2012.02.066
Keywords
Ordered TiO2 nanotube arrays; Micro-solid phase equilibrium extraction; Polychlorinated biphenyls; Gas chromatography
Funding
- Natural Science Foundation of China [20877022]
- Program for New Century Excellent Talents in University [NCET-10-0813]
- Natural Science Foundation of Henan Province [082102350022]
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Present study investigated the applicability of ordered TiO2 nanotube arrays for the enrichment and determination of polychlorinated biphenyls (PCBs) in water samples. A new and reliable method was developed for the preconcentration and determination of PCBs by micro-solid phase equilibrium extraction in combination with gas chromatography and electron capture detection (GC-ECD), which exploited the special physical and chemical properties of ordered TiO2 nanotube arrays. The experimental results indicated that low LODs were easily achieved in the range of 0.02-0.10 mu g L-1 for PCB-28, PCB-52, PCB-101. PCB-153, PCB-138, and PCB-180. The proposed method was validated with several real water samples, and good spiked recoveries have been obtained in the range of 95.8-110.5%. The experimental results demonstrated that TiO2 nanotube arrays could be reused for over 200 times without the lost of the extraction efficiency. All these showed that TiO2 nanotube arrays would be very useful in the enrichment and determination of trace pollutants. (c) 2012 Elsevier B.V. All rights reserved.
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