Recent advances and applications of carbon nanotubes based composites in magnetic solid-phase extraction

Carbon nanotubes (CNTs) based magnetic composites have great exploration and application potentials in magnetic solid-phase extraction (MSPE) technology due to their unique structures and extraordinary physic-chemical properties, which have attracted continued attentions from different analytical fields. In the review, magnetic CNTs composites based MSPE procedures are introduced, and the modification strategies for magnetic pure CNTs based on functional groups, reagents and materials are detailedly discussed. In addition, the applications of CNTs based magnetic composites in inorganic and organic analysis (drug and pesticide residues, chemical industry pollutants, foods, and biochemical analytes) are respectively presented. Finally, the research prospects and directions of CNTs based magnetic composites in MSPE are further identified. (C) 2019 Elsevier B.V. All rights reserved.