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The present works report the graphite based electrochemical sensor modified by nano-sized praseodymium ferrite (np-PrFeO3) materials for the detection of dopamine. The combustion technique was used to synthesize these nanomaterials of np-PrFeO3 using praseodymium oxide and ferric nitrate as precursor materials. The nanomaterials were characterized by field emission scanning electron microscopy and transmission electron microscopy techniques. The crystallite sizes of synthesized nanoparticles (nps) were in the range from 40-45 nm with cubic crystal system. Cyclic voltammetry and Differential pulse voltammetry techniques were used to study the electrochemical property and were observed to be superior to earlier reports. The limit of detection of dopamine at PrFeO3/GP electrode was 600 nM with 5 to 200 μM for linearity range. The phosphate buffer solution of pH 6.0 was used for all experimental work with maintaining the scan rate 100mVs and 50mVs for cyclic voltammetry and Differential pulse voltammetry, respectively.

Praseodymium ferrite nano-particles based modified electrode and its application in determination of dopamine