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Bibi, Sania; Zaman, Muhammad Iqbal; Niaz, Abdul; Tariq, Muhammad; Khan, Shahan Zeb; Zulfiqar, Asma; Rahim, Abdur; Jan, Saleem
Materials chemistry and physics, 01/2023, Letnik: 294Journal Article
Herein we report, a simple operable, sensitive, and highly selective, voltammetric method for the determination of iodide (Iˉ) using chitosan modified multiwall carbon nanotube paste electrode (chit-MWCNTPE). It is established that chit-MWCNTPE exhibited a pronounced response toward Iˉ oxidation. The peak potential of Iˉ is recorded at 0.69 V vs SCE. The conditions such as scan rate (V.s−1), accumulation time (ta), and pH are thoroughly optimized for the voltammetric determination of Iˉ. A wide range linear response is observed between oxidation peak current and Iˉ concentration (0.1–100 μM). The limit of detection (LOD) for Iˉ on chit-MWCNTPE is found to be 0.03 μM. The developed method is highly selective for Iˉ detection in the presence of various interfering ions. The method is successfully applied for the determination of Iˉ in urine samples. The method has high selectivity for Iˉ detection at comparably low potential as well as amiable LOD and Linear range. •Chitosan modified multiwall carbon nanotube paste electrode was studied selective determination of Iodide.•Chit-MWCNTPE material was characterized by SEM, EDX, XRD and FT-IR.•The sensitivity and LOD of Chit-MWCNTPE for iodide was found to be 328.8 μA/mM cm−2 and 0.03 μM, respectively.
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