Figure 5: Typical amperometric responses of the TiO2 (a), TiO2-AuNP2 (b) and TiO2-AuNP1 (c) modified graphite paste electrode on the addition of varying concentrations ( 10 nM to 5 mM) of hydrazine in 0.1 M phosphate buffer, pH 7.0 at 25°C at 0.2 V vs Ag/AgCl. Inset shows the corresponding linear range of hydrazine detection.