Formalin detection is a deep concern in food items as its recurring consumption causes some life-taking diseases like chronic cancer. This article proposes a biosensor based on surface plasmon resonance (SPR) that uses this resonance-based concept for formalin detection. Our proposed hybrid design consists of two metallic layers of gold (Au), black phosphorus (BP) as a basic recognition element (BRE), and a single titanium dioxide layer (TiO₂) film. The performance parameters were being calculated. The highest sensitivity achieved is \(327.6{\text{ deg}}/{\text{RIU}}\) for Bi-films of TiO₂ and one BP film. By using attenuated total reflection (ATR), the formalin detection using biosensor with the help of reflectance and incident angle plot for various formalin concentrations. Finally, the previous and this comparative research analysis is being studied. The analysis of the proposed sensor has been carried out using COMSOL Multiphysics.

福尔马林检测是食品中的一个深层次问题，因为它的反复消耗会导致一些致命的疾病，如慢性癌症。本文提出了一种基于表面等离子共振 (SPR) 的生物传感器，该传感器使用这种基于共振的概念进行福尔马林检测。我们提出的混合设计由两个金属层金 (Au)、作为基本识别元素 (BRE) 的黑磷 (BP) 和单个二氧化钛层 (TiO ₂ ) 薄膜组成。正在计算性能参数。_{对于 TiO 2}的双膜，获得的最高灵敏度为\(327.6{\text{ deg}}/{\text{RIU}}\)和一部 BP 电影。通过使用衰减全反射 (ATR)，利用生物传感器在各种福尔马林浓度的反射率和入射角图的帮助下进行福尔马林检测。最后，正在研究前人与本次比较研究分析。使用 COMSOL Multiphysics 对所提出的传感器进行了分析。