E., & APH Association – 5310) analysis is being extensively more used than the other two. Nevertheless, currently the Total Organic Carbon (TOC) (Federation W. E., & APH Association – 5220) and Biochemical Oxygen Demand (BOD 5) (Federation W. Thus, determining their presence and concentration requires a different kind of analysis, traditionally measured by two tests, Chemical Oxygen Demand (COD) (Federation W. Organic matter determination represents one of the most significant challenges since it includes all carbonaceous compounds and some other elements, such as hydrogen, oxygen, and nitrogen. Wastewater treatment requires continuous monitoring of pollutants, therefore, analyses criteria for this type of water have been established, i.e., temperature, fats and oils, sedimentable solids, pH, conductivity, inorganic ions concentration, etc.