The voltammetric determination of hydrazine at metal nanoparticle modified conductive polymer film electrode

Hydrazine (N2H4) and its derivatives are widely used in chemical and pharmaceutical industries and agriculture as fuel cells, explosives, rocket propellants, weapons for mass destruction, corrosion inhibitor, emulgators, insecticides, catalysts and plant growth regulators. Hydrazine doesn't create the greenhouse effect because carbon isn't its structure and doesn't form the CO and CO2 in a consequence the reaction. The conductor polymers synthesizing with the electrochemical method in the electrode surface are using in recent years. Moreover, metal nanoparticle electrodes modified on this polymer surfaces are been densely studied. Because physical and chemical characteristics of the substance are been changed in the nanodimensions, unit and active surface of the substance area also increase. More pure metal nanoparticle can be obtained with the electrochemical methods. In this work, it is gone to the way which the electrocatalytic surfaces catalysising oxidation of hydrazine are formed. Besides, it has been developed the voltammetric method for hydrazine determination. L-serine and alanine aminoacids were polymerized electrochemically at glassy carbon electrode surface and be modified with Pt and Au nanoparticles in the strong acidic condutions. These modified surfaces were characterized with electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) techniques. After, the effect of hydrazine oxidation of the modified surfaces has been researched ve these results have been compared with bare glassy carbon electrode. The oxidation peak potential current of 1,0 mM hydrazine is at -395 mV at Ptnano/poly(L-serine)/GCE, that's it showed the negative slipping1196 mV to the bare GCE, the oxidation of hydrazine is at 128 mV Aunano/poly(L-serine)/GCE that's it showed the negative slipping 673 mV to the bare GCE. The oxidation peak potential of hydrazine is at -185 mV at Ptnano/poly(alanine)/GCE, that's it showed to the negative 986 mV to the bare GCE, the oxidation of hydrazine is at 289 mV Aunano/poly(alanine)/GCE that's it showed to the negative 512 mV to the bare GCE. According to these results, the largest potential slipping occured at Pt nanoparticle modified poly(L-serine)/GCE and poly(alanine)/GCE. Finally, the method has been developed for determination of hydrazine in Karaçay River waste water sample. Linear range for 1,0 mM hydrazine is 40 - 1000 µM (R2=0,9974) and LOD 10,0 µM at Ptnano/poly(L-serine)/GCE; 5-1000 µM (R2=0,9988) and LOD 2,0 µM at Aunano/poly(L-serine)/GCE. Linear range for hydrazine is 40 - 1000 µM (R2=0,9977) and LOD 15,0 µM at Ptnano/poly(alanine)/GCE; 60-1000 µM (R2=0,9998) and LOD 20,0 µM at Aunano/poly(alanine)/GCE. L-serine, alanine, Pt and Au nanoparticle modified electrodes have a good stability, sensitivity, reproducibility and selectivity. The proposed method has been practically and successfully aplied for the determination of hydrazine and these modified electrodes can be used as anode material in the fuel cell.