Evelyn de F. Guimarães, Eliane Cristina Pires do Rego, Helen Cristine Moreira Cunha, Janaína M. Rodrigues, José Daniel Figueroa Villar, Valnei Smarçaro da Cunha
HOMOGENEITY STUDY FOR CERTIFICATION OF A CANDIDATE REFERENCE MATERIAL FOR POLYCYCLIC AROMATIC HYDROCARBONS