| Summary: | Environmental pollution is a worldwide concern, especially pollution of water bodies. To measure the level of pollution, environmental legislation uses parameters as indicators of quality. Effluents from wash stations and mechanical workshops have a high polluting power due to the amount of oil coming from automobile parts and motors. Gravimetry is the official method for Rio Grande do Sul, according to the State Foundation for Environmental Protection Henrique Luiz Roessler (Fepam). However, a method requires relatively more time and more steps than in a spectrophotometric analysis. Therefore, the present study aimed to develop a spectrophotometric methodology for the analysis of oils and greases. The samples from mechanical workshops and washing stations were collected by a laboratory accredited by the Ministry of Agriculture, Farming and Supply (MAPA) and Metrology institute (Inmetro) from a city located in Rio Grande do Sul. The samples were submitted to analysis by the official method and the results were compared to the proposed method. The results showed that the recovery tests were within the accepted range and showed to be linear. In this way, it presents a positive perspective to be used as an alternative method with less analysis time.
|
|---|
