Mnati, Fatimah Alzahraa NabeelOkman Kocoglu, Irem2024-09-292024-09-2920240009-45362192-6549https://doi.org/10.1002/jccs.202400160https://hdl.handle.net/20.500.14619/3701An amperometric sensor for ascorbic acid determination has been developed by modifying the surface of a glassy carbon electrode (GCE) with polyaspartic acid (PolyAsp), carboxylated multi-walled carbon nanotube (c-MWCNT), and ionic liquid (IL, 1-butyl-3-methylimidazolium hexafluorophosphate). The amount of each modification material on the surface was optimized in order to achieve good analytical performance. The operating conditions of c-MWCNT-IL/PolyAsp/GCE were optimized. The performance characteristics of c-MWCNT-IL/PolyAsp/GCE were investigated at optimum pH (8.0) and optimum potential (+0.20 V), and the sensor responded linearly to ascorbic acid between 5.3-2766.3 mu M with a sensitivity of 19.64 mu A mM-1 and detection limit of 3.0 mu M. Determination of ascorbic acid in vitamin C tablet, vitamin C injection solution, and orange juice was successfully performed with the presented sensor and the recovery values were found between 98.9% and 101.6%. Fabrication steps of the c-MWCNT-IL/PolyAsp/GCE. imageeninfo:eu-repo/semantics/closedAccessamperometric sensorascorbic acidcarboxylated multi-walled carbon nanotubesionic liquidpolyaspartic acidArticle10.1002/jccs.2024001602-s2.0-85201096481Q3WOS:001290163900001N/A