| Graphitic carbon nitride(g-C3N4),a novel two dimensional carbon based nanomaterial,has been widely applied in catalysis degradation,biosensor,energy storage and biomedicine.The in built N rich functional groups and electronic delocalization properties endow g-C3N4 with complex adsorption capabilities,including complexion,hydrophobic effect,π-π conjugation,hydrogen bond and electrostatic interaction.Particularly,the large specific surface area,satisfactory pH tolerance,facile and inexpensive preparation of g-C3N4 make itself qualified as an extraordinarily wonderful adsorbent.In recent years,g-C3N4 and its composites have been applied to the sample pretreatment in solid phase extraction,magnetic solid phase extraction and solid phase microextraction.In this review,the applications of g-C3N4 materials in sample pretreatment are summarized,and the future trends and prospects of g-C3N4 and its composites in sample pretreatment are also presented. |