Simultaneous determination of phenylhydrazine and hydrazine by a nanostructured electrochemical sensor

► One nanostructured electrochemical sensor was prepared by a simple and rapid method. ► A derivative of hydroquinone and TiO2 nanoparticles were used for sensor fabrication. ► Linear range and detection limit of sensor were 2.0-1000 μM and 0.75 μM for PhH. ► Simultaneous determination of PhH and HZ has been explored using this sensor. ► This sensor was applied in determination of PhH and HZ in some water samples.