Estudo de viabilidade da técnica de espectroscopia de fluorescência sincronizada para identificação simultânea de Hidrocarbonetos Policíclicos Aromáticos (HPAs) em matrizes líquidas

Abstract

The Polycyclic Aromatics Hydrocarbons (PAHs) are organic compounds that present two or more fused aromatics rings, composed of carbons atoms and hydrogen. In aquatic environment these compounds can be distributed by humid and dry deposition. The PAHs are associated the appearance of diseases, the that justified the preoccupation with the carcinogenic effect these substances. Different analytical methods are developed for the identification of PAHs in environmental samples, and in this context the objective in this work is to realize a study for analysis the efficiency in the simultaneous quantification of different PAHs in methanolic solutions using the technique Synchronous Fluorescence Spectroscopy (SFS) after to realize liquid-liquid extraction process. After the analysis, was verified in this work that the detection limit of the method was less that the recommended by the National Agency for Sanitary Vigilance in Brazil, mainly for the Benzo[a]pyrene that present high risk the health. After to realize liquid-liquid extraction process best results were observed for the Pyrene, Benzo[a]pyrene and Antrhacene in water with a concentration of 0,041 ng.ml-1 PAHs. This procedures for analysis of PAHs presents results with higher accuracy compared the conventional analytical procedures for analysis of PAH as liquid chromatograph and gas chromatograph. The technique of SFS satisfied the recommended by different agencies to protect health and the environment, and was efficient such as the chromatographic techniques, but with less cost and time for analysis.