Electrodeposition of poly(3,4-ethylenedioxythiophene) on a stainless steel wire for solid phase microextraction and GC determination of some esters with high boiling points

► A poly(3,4-ethylenedioxythiophene) (PEDOT) coating is prepared by electrochemical method. ► It shows cauliflower-like structure and has large surface area and high mass-transport rate. ► When it is used for SPME, it presents high stability and extraction efficiency for esters. ► This is a new way to make use of different monomers to prepare SPME fibers.