1. [1] S. Kuppusamy, P. Thavamani, M. Megharaj, K. Venkateswarlu, Y. B. Lee, R. Naidu, “Oak (Quercus robur) acorn peel as a low-cost adsorbent for hexavalent chromium removal from aquatic ecosystems and industrial effluents,” Water Air Soil Pollution, vol. 227, no. 62, pp. 1-11, 2016.
2. [2] N. E. Gümüş, B. Aşıkkutlu, H. B. Keskinkaya, C. Akköz, “Comparison of heavy metal absorption of some algae isolated from Altınapa Dam Lake (Konya),” Journal of Anatolian Environmental and Animal Sciences, no. 1, pp. 50-56, 2021.
3. [3] P. Liang, Q. Ding, F. Song, “Application of multiwalled carbon nanotubes as solid phase extraction sorbent for preconcentration of trace copper in water samples,” Journal of Separation Science, vol. 28, pp. 2339–2343, 2005.
4. [4] N. Ozkantar, E. Yilmaz, M. Soylak, M. Tuzen, “Pyrocatechol violet impregnated magnetic graphene oxide for magnetic solid phase microextraction of copper in water, black tea and diet supplements,” Food Chemistry, vol. 321, pp. 126737, 2020.
5. [5] N. Al-Masoud, M. Habila, Z. A. ALOthman, T. S. S. Alomara, N. Alraqibah, M. Sheikh, A. A. Ghfar and M. Soylak, “Nano-clay as solid phase microextractor of copper, cadmium and lead for ultra-trace quantification by ICP-MS,” Analytical Methods, vol. 12, pp. 4949-4955, 2020.