Detection of Theophylline using Samarium Oxide Nanoparticles Ingrained Graphite Electrode.

In this overview, a significantly low-cost electrode for the quick determination of theophylline (THP) using graphite electrode ingrained with samarium oxide nanoparticles is fabricated. The electrochemical behavior of the fabricated electrode is studied in details using cyclic and differential pulse voltammetry (DPV). The electrode has shown a linear working range of 10–1000 μ M with a low detection limit of 5 5.69 μ M. The characteristics of the electrode are studied in terms of repeatability, reproducibility and stability with RSD values 1.59%, 2.04% and 5.33%. Two varieties of black tea were taken and successfully segregated using principal component analysis (PCA) tool with a separability index of 13.14. This study explicitly demonstrates a significant improvement in electrochemical detection of THP in tea samples using samarium oxide nanoparticles infused in the graphite paste. The novelty of this research work lies in the fact that these fabricated electrodes can be dipped into the tea samples directly with no pre-treatment, hence an easy estimation of the quality of tea sample is possible. [ABSTRACT FROM AUTHOR]