Khairun Nisah, Eka Safitri, Rahmi Rahmi, Muliadi Ramli, Reni Silvia Nasution, Muhammad Iqhrammullah
This study used a polyurethane (PU)-based ion selective electrode (ISE) immobilized with di-(2-ethyl hexyl) phosphoric acid (D2EHPA) to detect and quantify Pb2+ ions at low concentrations (10−10 to 10−1 M) in aqueous solution. PU, synthesized from castor oil (Ricinus communis L.), was utilized as the ISE membrane matrix. The ISE demonstrated a sensitivity of 26.24 ± 0.12 mV/decade, a detection limit of 1.44 × 10−7 M, and a response time of 10 s. We maintained the measurement stability for up to six days of storage. The results of Pb2+ quantification produced by ISE were compared with the results using atomic absorption spectroscopy (AAS), indicating similar Pb2+ concentrations in both artificial and real wastewater samples (calculated t-value < theoretical t-value). Therefore, this ISE is suitable for detecting trace levels of Pb2+ and quantifying them with high accuracy. © 2024 The Author(s)
Department of Chemistry, Faculty of Science and Technology, Universitas Islam Negeri Ar-Raniry, Banda Aceh, 23111, Indonesia; Department of Chemistry, Faculty of Mathematics and Sciences, Universitas Syiah Kuala, Banda Aceh, 23111, Indonesia; Postgraduate Program of Public Health, Universitas Muhammadiyah Aceh, Banda Aceh, 23123, Indonesia
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