Identification of carotenoids by HPLC-DAD-MS/MS from the red alga Gracilariopsis tenuifrons and Gracilariatenuistipitata - Mandelli, Fernanda; Torres, Priscila; Chow, Fungyi; Santos, Deborah Yara Alves Cursino dos; Mercadante, Adriana Z (Congresso Brasileiro de Espectrometria de Massas - BrMASS, 2011)