Development of a solid-phase extraction system modified for preconcentration of emerging contaminants in large sample volumes from rivers of the lagoon system in the city of Rio de Janeiro, Brazil

A single method modified for monitoring of emerging contaminants in river water was developed for large sample volumes. Water samples from rivers of the lagoon system in the city of Rio de Janeiro (Brazil) were analyzed by the SPE-HPLC-MS-TOF analytical method. Acetaminophen was detected in four rivers in the concentration range of 0.09 μg L− 1 to 0.14 μg L− 1. Salicylic acid was also found in the four rivers in the concentration range of 1.65 μg L− 1 to 4.81 μg L− 1. Bisphenol-A was detected in all rivers in the concentration range of 1.37 μg L− 1 to 39.86 μg L− 1. Diclofenac was found in only one river, with concentration of 0.22 μg L− 1. The levels of emerging organic pollutants in the water samples of the Jacarepaguá hydrographical basin are significant. The compounds are not routinely monitored and present potential risks to environmental health.