Determination of heavy metals (Pb and Cd) in guava pulps (psidium guajava) obtained in the city of Cartagena. BISTUA [Internet]. 2019 Aug. 5 [cited 2025 Oct. 15];17(2):137-43. Available from: https://ojs.unipamplona.edu.co/index.php/bistua/article/view/242