"JJF 1641-2017 UV-Visible Spectrophotometer Type Evaluation Outline" is suitable for new product type evaluation of spectrophotometers with a Wavelength range between 190 nm and 1,000 nm and continuously adjustable wavelength. The standard is based on Lambert-Beer's law and is designed to perform quantitative analysis and qualitative identification by the selective absorption of ultraviolet-visible light by analytical substances. The instrument consists of Light source, monochromator, sample chamber, Detector, signal processing, and display and storage system. It is used in scientific research, medicine, environment monitoring and other fields. The cited documents include relevant national standards for spectrophotometer and measurement terminology, ensuring that the instrument meets the latest technical requirements and Measurement accuracy.