Controlling nitrite levels used as a preservative in food technology is of great importance, and studies are being conducted on various systems for nitrite determination. Electrochemical sensors stand out because of their portability, affordability, and environmentally friendly applications. In this study, the optimization of key parameters for the electropolymerization of Bismarck Brown Y (BBY) was investigated in detail. Subsequently, a layer‐by‐layer (LbL) assembly strategy was employed to fabricate an electrocatalytic thin film composed of BBY and carbon nanomaterials on a pencil graphite electrode (PGE), which is an economical, electrically conductive, electrochemically active, and readily available substrate, for the amperometric determination of nitrite. Advanced characterization techniques were performed on the resulting thin films, and their applicability for nitrite analysis in both standard solutions and real samples was investigated. The results showed that the LbL formation using reduced graphene oxide (rGO) yields more effective results for nitrite analysis than multiwalled carbon nanotube incorporation. The produced rGO–poly(BBY)/PGE for amperometric sensing of nitrite revealed that the current density is linearly proportional to the nitrite concentration in the range from 8.45 to 4610 μM, with a sensitivity of 0.55 μA μM −1 cm −2 . The detection limit of rGO–poly(BBY)/PGE was calculated as 2.56 μM. The amperometric quantification of nitrite in selected real samples using the standard addition approach yielded high recovery values.
Sorkulu et al. (2026) studied this question.