Individual and simultaneous electrochemical determination of nitrofurantoin and ascorbic acid in biological samples using a novel La2YBiO6 double perovskite deposited on MWCNTs as a nanocomposite

In this study, La2YBiO6 double perovskites were prepared using a sol-gel method and La2YBiO6 double perovskites decorated on multiwalled carbon nanotubes (LYB/MWCNTs) were prepared using a sonication method. LYB/MWCNTs displayed strong conductivity, electrocatalytic activity, and fast electron transfer. These features are essential for the simultaneous detection of nitrofurantoin (NFT) and ascorbic acid (AA) in biological samples. Various structural and morphological characterization approaches were used to validate the development of LYB/MWCNTs. LYB/MWCNTs/GCE were analysed using electrochemical techniques. Interestingly, LYB/MWCNTs displayed the lowest detection limit for NFT of 13.74 and AA of 12.37 nM with a linear concentration range of 10-120 nM (NFT and AA) whereas the individually estimated LOD for NFT and AA (10-120 nM) was 10.94 nM and 13.43 nM, respectively. The developed sensor demonstrates significant selectivity and its practicability for the detection of NFT and AA in food samples was investigated with good recoveries.