Amperometry sensor for real time detection of hydrogen peroxide adulteration in food samples
Shatrudhan Palsaniya, Bheru Lal Jat, Soumyo Mukherji
Abstract
Porous and defective nanomaterials lead to higher adsorption and are widely used in electrochemical sensor applications. The rGO-MoS 2 tailored defect rod shapes provide rapid electron conduction thanks to redox reactions in the sensing medium. Modified polyethylene terephthalate (PET) flexible carbon screen-printed electrode (SPE) shows H 2 O 2 sensing in food samples. We measured linear current amperometry signals in various sensing mediums of 0.1 M phosphate buffer solution (PBS), raw apple juice, and raw milk in the 1 to 50 μM range. Synergistic effects improved the sensing performance by sensitivity (S) of ∼ 773.33 μA/cm 2 μM and limit of detection (LOD) of 0.017 μM (S/N, 3:1) in 0.1 M PBS. The observed LODs in the juice and milk samples are 0.025 μM ( S = 324.33 μA/cm 2 μM) and 0.046 μM ( S = 138 μA/cm2 μM), respectively. This non-enzymatic research is fit to employ H 2 O 2 sensing, implementing handheld, real-time controlled units in liquid food samples.