Abstract
Oxalic acid (OA) has been recognized as a key indicator for the diagnosis of kidney stones. Non-enzymatic electrochemical sensors are required for OA, especially those manufactured on various screen-printed electrodes modified with nanomaterials that ensure simplicity and speed in manufacturing and accuracy in use. Here we propose a sensor design based on a screen-printed carbon electrode (SPCE) made of carbon nanofiber paste (CNF) and conductive polymer methylbenzenpyrrole, that has been meticulously studied by modeling and experimental analysis to obtain the most feasible solution for an OA detection sensor with millimolar precision. The developed sensor reached a limit of detection (LoD) of 0.5 mM of oxalic acid with a quasi-linear characteristic.
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