The Liquid-Liquid Extraction of Toxic Metals (Cd, Hg and Pb) by Calixarenes. Pak. J. Anal. Environ. Chem. [Internet]. 2009 Dec. 1 [cited 2025 Jul. 12];10(1 & 2):1-13. Available from: https://pjaec.pk/index.php/pjaec/article/view/436