Assist. Prof. Dr. Saadi M. D. Al-Nuzal present a lecture entitled "Analytical Applications of Spectroscopy of Ultraviolet Radiation Absorption" on a number of graduate students PhD and MA in the laboratories of the Department of Environmental Pollution, ERC. The lecture included the theoretical basis of this technique and Lambert Bauer's law and its applications. It also included the description of components of the commercially available spectrophotometers and their types and how they are used for the quantitative analysis of many natural, industrial and medical materials and in academic studies. A laboratory demonstration was made of how to use this spectrophotometer to measure the spectrum of a certain known compounds and identify them by the wavelength of absorbed chromophoric groups and how to take the advantage of the molar absorptivity constant for each absorption peak in the compound.