Déniz, Rubén del Toro, Marlene Seijo Echevarría, Zaida Fernández Terra, Ana María Peón Espinosa, and Humberto Varela de Moya. “Use of Modified Silica Gel for Concentrating Pb (II) and Cd (II) Occurring in Form of Complex Anions”. Eclética Química 32, no. 2 (June 26, 2007): 13–16. Accessed November 22, 2024. https://revista.iq.unesp.br/index.php/ecletica/article/view/361.