Screen printed graphite electrode modified with two-dimen-sional leaf-like zeolitic imidazolate framework-L (Zn) for efficient electrochemical sensing of sulphite
Satar Jabbar Rahi Algraittee, Ban Waheed Hussein Bdair, Firas Abdul Abass Sukir, Raed Muslim Muhibes, Mustafa Mudhafar, Qais R. Lahhob
Abstract
In this paper, we describe the use of a screen-printed graphite electrode modified with a two-dimensional leaf-like zeolitic imidazolate framework-L (Zn), ZIF-L (Zn) for the deter¬mination of sulphite. We started by using linear sweep voltammetry to investigate the redox properties of the modified electrode at different scan rates (10 to 400 mV s-1). Next, we evaluated sulphite oxidation in the modified electrode. Using differential pulse voltammetry (DPV), the linear dynamic range of 0.04-900.0 µM and the limit of detection (3s/m) of 0.01 μM were obtained. DPV was also used to quantify sulphite in various real samples using the standard addition method.