Detekcija iona olova elektrodom od ugljikove paste modificirane 2-benzimidazoletiolom: voltametrijska studija

Autor: Sakina Touzara, Jihane El Mastour, Amina Amlil, Abdelilah Chtaini
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Kemija u industriji : Časopis kemičara i kemijskih inženjera Hrvatske
Volume 71
Issue 3-4
ISSN: 1334-9090
0022-9830
Popis: In this work, an electrochemical sensor was prepared by modifying a carbon paste with the organic molecule of 2-benzimidazolethiol (CPE/OM) by mixing methods (by combination of the organic molecules and the carbon electrode). The sensor was tested for detection of lead ions in an aqueous solution. All reactions studied took place on the modified electrode surface, the place of contact between the electrode and the electrolytic medium. For this reason, the electrochemical properties of the CPE/OM, including cyclic voltammetry and square wave voltammetry techniques, were used. Cyclic voltammetry studies have indicated the reaction involved. The determination of lead was carried out utilising the voltammetric technique at the surface of the modified electrode, and the correlation between the current of peak oxidation and the concentration of this ion showed a detection limit (DL) of 3.43 ∙ 10–6 mol l–1. The experimental results proved that the carbon paste electrode modified with 2-benzimidazolethiol had high sensitivity toward lead ions and a wide linearity range. This work is licensed under a Creative Commons Attribution 4.0 International License.
U ovom je radu pripravljen elektrokemijski senzor (CPE/OM) modificiranjem ugljikove paste s organskom molekulom 2-benzimidazoletiolom. Ispitana je primjenjivost senzora za detekciju iona olova u vodenoj otopini. Sve proučavane reakcije odvijale su se na modificiranoj površini elektrode, tj. na mjestu kontakta elektrode i otopine. Stoga su upotrijebljene ciklička voltametrija i voltametrija kvadratnog vala. Ciklička voltametrija je pokazale koje se reakcije odvijaju. Određivanje olova provedeno je voltametrijski na površini modificirane elektrode, uz granicu detekcije (DL) od 3,43 ∙ 10–6 mol l–1. Eksperimentalni rezultati pokazali su da elektroda modificirana 2-benzimidazoletiolom ima visoku osjetljivost prema ionima olova te veliko područje linearnosti. Ovo djelo je dano na korištenje pod licencom Creative Commons Imenovanje 4.0 međunarodna.
Databáze: OpenAIRE
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