An-Nufuus, D.A.T. et al. 2023. Diffusion Coefficient of Phosphate Ion in Citric Acid-Agarose Gel Used in Diffusive Gradient in Thin Films (DGT) Passive Sampler . Jurnal Penelitian Pendidikan IPA. 9, 8 (Aug. 2023), 6035–6044. DOI:https://doi.org/10.29303/jppipa.v9i8.3593.