Document Type : Research Paper
Department of Chemistry, Omidiyeh Branch, Islamic Azad University, Omidiyeh, Iran.
This study describes the construction of a new electrochemical sensor and applies it for the determination of Hg2+ ion. This sensor was prepared using new nanographene on G-C3N4 nanosheets. Although the other methods (gas or liquid chromatographic, electrophoresis, flow injection) for measuring Hg2+ ion have advantages such as excellent accuracy and reproducibility, it has limitations such as long-time measure, high equipment cost. Here, we report the use of an electrochemical approach for analytical determination of Hg2+ ion that takes 120 s. The calibration curve was linear in the range of (0.03 to 33.0 nM). The current response was linearly proportional to the Hg2+
ion concentration with a R2~ 0.999. We demonstrated a sensitivity a limit of detection of (0.093 nM). Finally, Sensor nanosheets G-C3N4/CPE has been successfully applied for the determination of Hg2+ ion in different kind of water samples. The method introduced to measure Hg2+ ion in real samples such as water samples was used and can be used for other samples.