With continuous development in the field of sample preparation technology, solid phase micro-extraction (SPME) has been widely used in analytical chemistry for high extraction efficiency and convenient operation. Different materials lead to different extraction results. Among existing materials, carbon-based materials are still attracting attention from scientists due to their excellent physical and chemical properties as well as their modifiable surfaces, which could enhance the adsorption effects of SPME fiber. This review introduces the preparation methods and applications of different kinds of carbon-based material coatings on fibers. In addition, directions for future research on carbon material composites are discussed.

Abstract
 1. Introduction
 2. Preparation and Application of Carbon NanotubeComposite Coating
  2.1. Physical attachment
  2.2. Sol-gel technique
  2.3. Chemical bonding
  2.4. Electrophoretic deposition
 3. Preparation and Application of FullereneCoating
 4. Preparation and Application of GrapheneCoating
 5. Preparation and Application of Ordered PorousCarbon Coating
 6. Preparation and Application of Carbon FiberCoating
 7. Conclusions
 Conflict of Interest
 Acknowledgments
 References

• Jian Guo(Department of Chemical Engineering, Yanbian University)
• Soo-Jin Park(Department of Chemistry, Inha University)
• Long-Yue Meng(Department of Chemical Engineering, Yanbian University, Department of Chemistry, MOE Key Laboratory of Natural Resources of the Changbai Mountain and Functional Molecules, Yanbian University) Corresponding Author
• Xinghua Jin(Department of Chemical Engineering, Yanbian University) Corresponding Author