“…Mediators such as rhodium particles deposited polyvinyl pyridine film (Shaidarova et al, 2004), palladium particles deposited polyaniline film (Shaidarova et al, 2006), cobalt phthalocyanine complex (Wang et al, 1988), and ruthenium oxide-ruthenium cyanide composites film (Shaidarova et al, 2008; were successfully used as the electrode modifier for enhancing electron-transfer kinetics and lowering the overvoltage. Modified electrodes such as carbon nanotubes (CNTs)-Nafion modified electrodes (Issac and Kumar, 2009), boron-doped electrodes (Preechaworapun et al, 2006;Souza et al, 2008), metalloporphyrin modified electrodes (Joseph and Kumar, 2010), bismuth film electrodes , and amperometric DNA-peroxidase sensors (Evtugyn et al, 2005) were designed for sulfonamide antibiotics determination. The results demonstrated that electrochemical methods have advantages of high sensitivity, good stability, and promising selectivity.…”