Separation and Preconcentration of Cobalt(II) from Water Samples with Amberlite CG-120 Resin

Document Type : Research Article


1 Burdur Mehmet Akif Ersoy University, Faculty of Arts & Sciences, Chemistry Department, 15030 Burdur, TURKEY

2 urdur Mehmet Akif Ersoy University, Faculty of Arts & Sciences, Nanoscience and Nanotechnology Department, 15030 Burdur, TURKEY



 A selective solid-phase extraction method has been developed for the preconcentration and separation of trace amounts of Co(II). The method was based on the adsorption of Co(II) ions
on the Amberlite CG-120 resin. The adsorbed Co(II) ions on the resin were eluted by 4 mol/L HCI and then they were determined by Flame Atomic Absorption Spectrometry (FAAS). Various experimental conditions, such as pH, type and concentration of eluent, the flow rate of sample and eluent solution, amount of resin, and sample volume were investigated to obtain better sensitivity and effective separation of trace levels of the Co(II) ions. Moreover, the interference effects of some ions on the recovery of Co(II) were also investigated. The developed method was applied for the determination of Co(II) ions in drinking and wastewater samples. The enhancement factor (EF) and limit of detection (LOD) values were found to be 25-fold and 9.32 µg/L, respectively. The accuracy of the method was tested by the certified reference material of TMDA-70.2 Lake Ontario Water and there was a good agreement between found and certified values at a 95% confidence level.


Main Subjects

[6] Bhatti H.N., Khadim R., Hanif M.A., Biosorption of Pb(II) and Co(II) on Red Rose Waste Biomass, Iran. J. Chem. Chem. Eng.(IJCCE), 30: 81-88 (2011).
[10] Bartosiak M., Jankowski K., Giersz J., Determination of Cobalt Species in Nutritional Supplements Using ICP-OES after Microwave-assisted Extraction and Solid-Phase Extraction, J. Pharm. Biomed. Anal., 155: 135–140 (2018).
[14] Tunçeli A., Ulaş A., Acar O., Türker A.R., Solid Phase Extraction of Cadmium and Lead from Water by Amberlyst 15 and Determination by Flame Atomic Absorption Spectrometry, Bull. Environ. Contam. Toxicol., 102: 297–302 (2019).
[18] Hamed N., Davoud H.F., Sadegh F., Extraction of Ni and Co via D2EHPA in the Presence of Acetate Ion, Iran. J. Chem. Chem. Eng.(IJCCE), 34: 61-67 (2015).
[20] Molaakbari E., Mostafavi A., Afzali D., Simultaneous Separation and Preconcentration of Trace Amounts of Copper (II), Cobalt (II) And Silver (I) by Modified Amberlyst®15 Resin, Int. J. Environ. Anal. Chem., 93: 365–376 (2013).
[24] Lemos V.A., Santos do Nascimento G., Nunes L.S., A New Functionalized Resin for Preconcentration and Determination of Cadmium, Cobalt, and Nickel in Sediment Samples, Water Air Soil Pollut,. 226: 2 (2015).
[30] SenGupta A. K., "Ion Exchange and Solvent Extraction: A Series of Advances", Taylor & Francis Group 6000 Broken Sound Parkway, NW (2007).
[32] Duran A., Tuzen M., Soylak M., Preconcentration of Some Trace Elements Via Using Multiwalled Carbon Nanotubes as Solid Phase Extraction Adsorbent, J. Hazard. Mater,. 169: 466–471 (2009).