Hermanto, D., Siswanta, D., Mudasir, M., Muhali, M. and Ismillayli, N. 2022. Design and Synthesis of the Poly Vinyl Chloride (PVC) Membrane for Fe(III) Ion Selective Electrode (ISE) Based on Ester Modified Humic Acid (EHA) as an Ionophore. Journal of Applied Research and Technology. 20, 6 (Dec. 2022), 630–637. DOI:https://doi.org/10.22201/icat.24486736e.2022.20.6.955.