Synthesis of acid resistant Fe₂V₄O₁₃-polypyrrole nanocomposite: its application towards the fabrication of disposable electrochemical sensor for the detection of As(III)

The development of reliable and environmentally benign electrochemical sensor for the detection of carcinogenic As(III) is of great scientific and public interest. Herein, thin film of novel Fe₂V₄O₁₃-polypyrrole nanocomposite was prepared on the screen printed electrode (SPE) and thus the prepared nanocomposite modified SPE was successfully used as one shot disposable electrochemical sensor for the detection As(III). The proposed sensor has high sensitivity towards As(III), wherein it exhibits wide linear range, from 0 to 500 ppb, with the detection limit (LOD) of 0.3 ppb, which is well below the value prescribed by World Health Organization (WHO). Therefore, the proposed sensor could be used for the detection of As(III) present in real samples. (paper)