MONITORING OF CONTAMINATION OF URBAN SURFACE WATERS IN THE CITY OF CAMPO GRANDE/MS BY HORMONES 17β-ESTRADIOL AND 17α-ETHINYLESTRADIOL USING DISPERSIVE LIQUID-LIQUID MICROEXTRACTION AND HPLC-UV

Studies have shown that hormones endocrine disrupting properties, which characterize them as potentially toxic to the aquatic environment. This study aims monitor water along Prosa Stream/Anhanduí River monthly, evaluate its contamination by 17β-estradiol (E2) and 17α-ethinylestradiol (EE2). Dispersive liquid-liquid microextraction (DLLME) was used for analyte extraction, with acetone a disperser solvent carbon tetrachloride extraction solvent, followed high-performance liquid chromatography ultraviolet detector (HPLC-UV) analytical tool. The results of this application in natural samples indicated presence hormone E2 approximately 72% points evaluated, concentration values between 48 µg L-1 175 L-1. In contrast, it not possible quantify concentrations synthetic EE2, these were below detection limit method applied. Even though there is no national environmental legislation limits amounts surface water, contaminations are significant, due their already known toxicological potential. It evident river from origin exit city appearance increase waters E2, thus clear urbanization around rivers has become an health problem providing