Synthesis, Characterization and Application of Calcium Ion-Imprinted Polymeric Solid-Phase Extraction and Pre-Concentration in Aqueous Solutions by Packed-Bed Columns. Iraqi Journal of Science [Internet]. 2023 Nov. 30 [cited 2024 Nov. 21];64(11):5462-75. Available from: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7758