Validation assay for total flavonoids, as rutin equivalents, from Trichilia catigua Adr. Juss (Meliaceae) and Ptychopetalum olacoides Bentham (Olacaceae) commercial extract - Rolim, André; Maciel, Carolina Penteado Moraes; Kaneko, Telma Mary; Consiglieri, Vladi Olga; Salgado-Santos, Idalina Maria Nunes; Velasco, Maria Valéria Robles (Journal of AOAC International, 2005)