Inkjet-printed graphene-poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) modified on screen printed carbon electrode for electrochemical sensing of salbutamol

In this work, a simple and sensitive inkjet-printed graphene-poly(3,4-ethylenedioxythiophene): poly(styrene-sulfonate) (GP-PEDOT:PSS) on screen printed carbon electrode (SPCE) is developed for detection of salbutamol (SAL), a prohibited drug in sport. GP-PEDOT:PSS dispersed solution is prepared for use as an ink by one-step electrolytic exfoliation from a graphite electrode. GP-PEDOT:PSS layers are then printed on SPCEs by dimatrix inkjet material printer and their electrochemical behaviors are characterized. It is found that SAL oxidation peak responses of PEDOT:PSS modified and GP-PEDOT:PSS modified SPCE electrodes are approximately 30 and 150 times higher than that of unmodified SPCE, respectively. In addition, excellent analytical features with a wide dynamic range of 500 mu M, a low detection limit (3S/N) of 1.25 mu M and low matrices' interference in pharmaceutical samples have been achieved. Therefore, inkjet-printed GP-PEDOT:PSS SPCE is a promising candidate for advanced electrochemical sensing applications. (C) 2011 Elsevier B.V. All rights reserved.