UV/Vis spectrophotometers play a crucial role in the petrochemical industry. By leveraging the absorption characteristics of substances to ultraviolet light, they enable high-precision quantitative analysis of organic components in petroleum products. During oil refining processes, the instrument accurately detects critical components like aromatic hydrocarbons, utilizing absorbance values at characteristic absorption peaks (e.g., wavelengths of 225nm and 254nm) to ensure the purity of fuel oils, lubricants, and other products meets industry standards. Concurrently, it monitors the concentration of petroleum-based substances in process wastewater, assisting enterprises in achieving environmental compliance.