| 초록 |
Oxalic acid (OA), a reducing agent exists widely in plants, animals and microbes. Excess intake of such products may lead to the formation of less soluble salt leading to the formation of kidney stones. In this study, a nanohybrid of gold nanoparticle, polypyrrole, and reduced graphene oxide (Au/PPy/rGO) was prepared by an in-situ chemical synthesis approach. The as-prepared nanohybrid has been applied for non-enzymatic electrochemical detection of oxalic acid in 0.1 M H2SO4 as electrolyte. The modified electrode showed a wider linear range (0.05mM to 7mM) with a lower detection limit of 0.02 mM. The experimental results also showed that the sensor has good reproducibility (R.S.D = 2.59% for 0.5mM, n = 3), high sensitivity of 91 μA/mM and good stability as well. Possible interferences such as glucose, dopamine, uric acid, Zn, Fe were investigated. The above mentioned compound does not interfere with oxalic acid detection. |
