Control software of standard instruments with specific applications for scanning, analysis of multistage kinetics, quantitative analysis and fixed wavelength. Ultraviolet-Visible spectroscopy (UV) is a spectroscopy by photon emission and spectrophotometry. Uses electromagnetic radiation (light) of the visible regions, near ultraviolet (UV) and infrared electromagnetic spectrum, that is, a wavelength between 380 nm and 780 nm. The radiation absorbed by molecules from this region of the spectrum produces electronic transitions that can be quantified. UV-visible spectroscopy is used to identify some functional groups of molecules, and in addition, to determine the content and strength of a substance.