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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering
Published on: June 1, 2016
High extraction efficiency for polar aromatic compounds in natural water samples using multiwalled carbon
Wenfeng Chen1, Jingbin Zeng, Jinmei Chen
1Department of Chemistry and the Key Laboratory of Analytical Sciences of the Ministry of Education, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
A new solid-phase microextraction fiber using multiwalled carbon nanotubes (MWCNTs)/Nafion efficiently extracts polar aromatic compounds (PACs) from water. This novel fiber offers improved performance over commercial options for environmental analysis.
Area of Science:
- Analytical Chemistry
- Environmental Science
Background:
- Accurate analysis of polar aromatic compounds (PACs) in natural water is crucial for environmental monitoring.
- Traditional extraction methods can be inefficient or require large solvent volumes.
Purpose of the Study:
- To develop and characterize a novel solid-phase microextraction (SPME) fiber for enhanced extraction of PACs.
- To optimize SPME conditions and evaluate the fiber's performance for water sample analysis.
Main Methods:
- Development of a novel SPME fiber coated with multiwalled carbon nanotubes (MWCNTs)/Nafion.
- Optimization of extraction parameters including time, stirring rate, and desorption conditions.
- Analysis of five PACs in natural water samples using gas chromatography-mass spectrometry (GC-MS).
Main Results:
- The MWCNTs/Nafion fiber showed homogeneous and porous coating (12.5 µm thickness).
- Higher extraction efficiency for PACs compared to a commercial fiber.
- Linear calibration curves (0.01–10 µg/mL), low detection limits (0.03–0.57 ng/mL), and good reproducibility (<7.5% single fiber, <10% fiber-to-fiber).
- High recovery rates (83.3–106.0%) for spiked PACs in natural water samples.
Conclusions:
- The developed MWCNTs/Nafion SPME fiber is a sensitive and reproducible method for extracting PACs from natural water.
- This novel fiber offers a promising alternative for environmental monitoring of polar aromatic contaminants.
