Dimethoate (DIM) as an organophosphorus pesticide is widely utilized especially in the cultivation of vegetables and fruits due to its killing effect on harmful insects. However, unconscious use of DIM in large amounts can also cause serious health problems. For these reasons, rapid and reliable detection of DIM from food samples is significant. In this study, a novel quartz crystal microbalance (QCM) sensor based on erbium molybdate incorporating sulfur-doped graphitic carbon nitride (EM/S-g-C₃N₄) and a molecularly imprinting polymer (MIP) was designed for DIM detection in apple juice samples. Firstly, an EM/S-g-C₃N₄ nanocomposite with high purity was prepared under hydrothermal conditions at high temperatures over a long period of time. After the modification of the EM/S-g-C₃N₄ nanocomposite on a QCM chip, the polymerization solution including N,N′-azobisisobutyronitrile (AIBN) as an initiator, ethylene glycol dimethacrylate (EGDMA) as a cross-linker, methacryloylamidoglutamic acid (MAGA) as a monomer, and DIM as an analyte was prepared. Then, the polymerization solution was dropped on an EM/S-g-C₃N₄ nanocomposite modified QCM chip and an ultraviolet polymerization process was applied for the formation of the DIM-imprinted polymers on the EM/S-g-C₃N₄ nanocomposite modified QCM chip. After the polymerization treatment, some characterization studies, including electrochemical, microscopic, and spectroscopic methods, were performed to illuminate the surface properties of the nanocomposite and the prepared QCM sensor. The values of the limit of quantification (LOQ) and the detection limit (LOD) of the prepared QCM sensor were as 1.0 × 10⁻⁹ M and 3.3 × 10⁻¹⁰ M, respectively. In addition, high selectivity, stability, reproducibility, and repeatability of the developed sensor was observed, providing highly reliable analysis results. Finally, thanks to the prepared sensor, it may be possible to detect pesticides from different food and environmental samples in the future.

In the present study, a novel voltammetric sensor based on a boron-doped copper oxide/graphene (B-CuO-Gr) nanocomposite and molecularly imprinted polymer (MIP) was developed for the detection of paclobutrazol (PAC) in apple and orange juice samples. The B-CuO-Gr nanocomposite was prepared using sol–gel and calcination methods. After modifying glassy carbon electrodes with the B-CuO-Gr nanocomposite, PAC-imprinted electrodes were prepared in the presence of 100.0 mM pyrrole (Py) monomer and 25.0 mM PAC using cyclic voltammetry (CV). After elucidating the surface properties of the prepared B-CuO-Gr nanocomposite and PAC-imprinted electrodes using various characterization techniques, the PAC-imprinted sensor was successfully applied to apple and orange juice samples, demonstrating high recovery. A linear range of 1.0 × 10⁻⁹ to 1.0 × 10⁻⁸ M PAC (R² = 0.9983) and a detection limit (LOD) of 3.30 × 10⁻¹⁰ M were observed, along with high selectivity, stability, and reproducibility for the MIP/B-CuO-Gr/GCE sensor.

Surface plasmon resonance (SPR) sensors have emerged as a powerful tool in biosensing applications due to their ability to provide sensitive and real-time detection of chemical and biological analytes. This review focuses on the development and application of molecularly imprinted polymer (MIP)-based SPR sensors for food analysis. By combining the high selectivity of molecular imprinting techniques with the sensitivity of SPR, these sensors offer significant advantages in detecting food contaminants and other target molecules. The article covers the basic principles of SPR, the role of MIPs in sensor specificity, recent advancements in this sensor development, and food applications. Furthermore, the potential for these sensors to contribute to food safety and quality control was explored, showcasing their adaptability to complex food matrices. The review concluded the future directions and challenges of SPR-MIP sensors in food analysis, emphasizing their promise in achieving high-throughput, cost-effective, and portable sensing solutions.

The petrochemical industry holds critical importance in terms of occupational health and safety (OHS) due to its intensive chemical processes and high-risk working environments. This review comprehensively examines chemical, physical, ergonomic, and psychosocial risk factors specific to the sector; common occupational accidents and diseases; national and international legislative frameworks; OHS management systems such as ISO 45001; training practices; and technological advancements. In addition, successful strategies are evaluated through national and global best practice examples and case studies. While the study identifies current problem areas, it also offers strategic, technological, and cultural-level recommendations to improve the sector’s OHS performance. Ultimately, establishing a sustainable safety culture in the petrochemical industry requires not only regulatory compliance but also the integration of digital solutions, behavioral approaches, and governance-based systems.