Estudo da precisão e da acuracidade do espectrofotômetro multiparâmetros pastel uv® secomam na análise dos parâmetros dbo e no3

Abstract

The quality of the water has been altered due to several actions. Thus, information for the understanding of environmental processes and, in particular, of water bodies in relation to anthropogenic impacts along the river basin becomes essential. Several parameters can be evaluated with respect to the physical-chemical aspects of water. These parameters identify and quantify the contents and types of elements present in a sample and allow the association with the effects on the environment. The use of traditional methods to determine contaminants in water requires techniques, specific laboratory procedures, time and considerable use of chemical reagents for the exact quantification of contaminants present. In this sense, an equipment capable of carrying out the analysis in loco without the use of reagents appears. This work aims to study the application, use, precision and accuracy of the PASTEL UV® spectrophotometer for analysis of water and effluents for the measurements of: BOD and NO3-, by comparison with results obtained by the traditional methods of evaluation of these parameters. Despite the simplicity, the equipment proved to be efficient and reliable in the rapid determination of the studied parameters. The PASTEL UV® spectrophotometer proved to be efficient and can be used in water monitoring campaigns at remote sites and at the time of contamination.