Determination of Heavy Elements (Lead, Cadmium, Copper, and Iron) in Samples of Black Tea in the Libyan Market (Tripoli). Comprehensive Journal of Science, [S. l.], v. 10, n. 39, p. 1238–1244, 2026. DOI: 10.65405/wat7z872. Disponível em: https://www.cjos.histr.edu.ly/index.php/journal/article/view/1858. Acesso em: 12 may. 2026.