Electropreparation of ( ± )‐10‐camphorsulfonate‐doped poly( o ‐phenylenediamine) in acetonitrile and its use in determination of glucose

Poly( o ‐phenylenediamine) (P o PD) film has been electrochemically prepared on Pt electrode in an acetonitrile–water medium containing o ‐phenylenediamine ( o PD) monomer and (±)‐10‐camphorsulfonic acid (HCSA) by using the cyclic voltammetry (CV). The P o PD film (P o PD–CSA) has been characterized by FTIR, CV, EIS, FESEM, and conductivity measurement. The glucose biosensor (Pt/P o PD–CSA/GOx) has been prepared from the P o PD coated electrode by immobilizing glucose oxidase (GOx) enzyme using glutaraldehyde. The biosensor shows a low detection limit and wide linear working range, a good reusability, long‐term stability, and anti‐interference ability. The Pt/P o PD–CSA/GOx has possesses higher sensitivity (2.05 μA/mmol L −1 ) and affinity to glucose due to the use of CSA ion as dopant. The linear concentration ranges of Pt/P o PD–CSA/GOx have been found to be 9.6 × 10 −3 to 8.2 mmol L −1 from calibration curve and 4.6 × 10 −2 to 100 mmol L −1 from the relationship between the (1/glucose concentration) and (1/current difference). © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39864.