Food preservatives and additives are the universal concern of recent days. Particularly, formalin is a chemical compound that is being commonly mingled with food for the preservation purpose. The recurrent ingesting of formalin contaminated food causes uncompromising health sicknesses like chronic cancer. Therefore, identification of formalin in food substances is an extreme need and day by day this need is growing as a general issue in the emerging terrains. In this article, a surface plasmon resonance (SPR) based sensor, comprised of graphene-PtSe₂ combined layers associated with a ZnO nano-sheet is presented for the detection of formalin in liquid solution. The performance of the sensor has been analyzed through an analytical approach using MATLAB commercial software. Consequence due to incorporation of the Graphene-PtSe₂ combined layer into the sensor structure along with ZnO layer has been studied. The observed sensitivity and quality factor are 155.33° RIU⁻¹ and 88.89 RIU⁻¹, respectively. This sensor senses the presence of formalin molecules by using attenuated total reflection (ATR) approach, assessing the reflectance vs SPR angle. It is found that the sensitivity of the conventional SPR based sensor is 128.33° RIU⁻¹, whereas an improved sensitivity of 155.33° RIU⁻¹ is obtained for this proposed amalgamated sensor structure. Later in time, a comparison of performance for different SPR sensor structures and the proposed sensor has been studied. Finally, another comparison study has been made with performance of the proposed sensor to other reported sensor in the literature.

食品防腐剂和添加剂是近来普遍关注的问题。特别地，福尔马林是通常出于保存目的而与食物混合的化合物。反复摄入被福尔马林污染的食物会导致健康疾病，如慢性癌症。因此，鉴定食品中的福尔马林是一个极端的需求，并且这种需求正日益成为新兴地区中的一个普遍问题。在本文中，一种基于表面等离振子共振（SPR）的传感器，由石墨烯-PtSe _2组成提出了与ZnO纳米片相关的复合层，用于检测液体溶液中的福尔马林。传感器的性能已通过使用MATLAB商业软件的分析方法进行了分析。已经研究了由于将石墨烯-PtSe ₂结合层与ZnO层一起引入传感器结构而导致的后果。观察到的灵敏度和品质因数分别为155.33°RIU ^-1和88.89 RIU ^-1。该传感器通过使用衰减全反射（ATR）方法来评估福尔马林分子的存在，评估反射率与SPR角的关系。发现常规基于SPR的传感器的灵敏度为128.33°RIU ^-1，而改进的灵敏度为155.33°RIU ^-1对于该提议的合并传感器结构获得^-1。后来，研究了不同SPR传感器结构与所提出的传感器的性能比较。最后，在文献中对提出的传感器与其他报告的传感器的性能进行了另一项比较研究。