Validation of HPLC, DPPH and nitrosation methods for mesalamine determination in pharmaceutical dosage forms - Rafael, Janice Aparecida; Jabor, José Roberto; Casagrande, Rúbia; Georgetti, Sandra Regina; Borin, Maria de Fátima; Fonseca, Maria José Vieira (Revista Brasileira de Ciências Farmacêuticas, 2007)