title: Carbon-based sorbents: carbon nanotubes.
abstract: Carbon nanotubes (CNTs), as an advanced material, have been widely used in various fields since its discovery in 1991. In recent years, as an excellent adsorption material, the pure and modified CNTs are successfully used for the purification and enrichment of food, medicine, environmental samples and so on. In this review, we focus on the detailed description of different CNTs-based extraction modes such as solid-phase extraction (SPE) (including cartridge and disk SPE, dispersive SPE, and μ-SPE) and solid-phase microextraction (SPME) (including fiber SPME, electrosorption-enhanced SPME, stir bar sorptive extraction, needle trap SPME, and hollow fiber SPME).
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
authors.forename: Xiaojing
authors.initials: X
authors.lastname: Liang
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
authors.forename: Shujuan
authors.initials: S
authors.lastname: Liu
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Wang
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China. Electronic address: guoyong@licp.cas.cn.
authors.forename: Yong
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China. Electronic address: sxjiang@lzb.ac.cn.
authors.forename: Shengxiang
authors.initials: S
authors.lastname: Jiang
mesh_terms: D000327:Adsorption; D037742:Nanotubes, Carbon / Q000737:chemistry*; D052616:Solid Phase Extraction / Q000295:instrumentation*
chemical_list: D037742:Nanotubes, Carbon
keywords: Carbon nanotubes; Solid-phase extraction; Solid-phase microextraction; Sorbent