Sequential injection analysis for mercury ion with modified screen – printed carbon electrode

Abstract

In this study, we developed a simple high-throughput and cost-effective method for monitoring toxic metal ion in an environmental aqueous sample. Mercury ion determination with Sequential Injection Analysis system (SIAs) coupled with the electrochemical detection on the modified screen-printed carbon working electrode (SPCE) is an alternative green analysis of mercury ion. The gold film was used as the modified material for improved mercury ion analysis in the automated system without memory effect on the electrode. Mercury oxidation signal was found at the potential of 0.7 V in 0.1 M HNO3 and 1.0 M HCl with the concentration low to 0.25 ± 0.18 mg×L-1. Online sample preparation and separation will study in the further experiment.

Fabrication and characterization of Sb-doped MXene prepared by hydrothermal method for use as a sensing electrode for heavy metal detection

“…Nowadays, the detection of heavy metal has attracted a lot of interest in sensing applications because it can pollute a range of environmental natural resources. Some extremely poisonous heavy metals including lead (Pb), cadmium (Cd), zinc (Zn), and mercury (Hg), have the potential to seriously harm aquatic life, humans, and ecosystems [14][15][16]. Because the surface functional groups presented in MXenes allows them to have greater compatibility with other substrates and unique electronic properties, compared with other 2D materials, the MXene would be a promising candidate for electrochemical sensing of heavy metals.…”