Validation study for preservative efficacy testing of cosmetics by the impedance method - Pinto, Terezinha de Jesus Andreoli; Ohara, Mitsuko Taba; Kaneko, Telma Mary; Souza, Marcia Regina Spuri Espinelli Lemes de; Bou-Chacra, Nadia Araci; Flauto, Simone; Schreiner, Gislaine Monteiro (Congreso Latinoamericano e Ibérico de Químicos Cosméticos, 1999)