The preparation of schwertmannites/mesoporous carbons and its application in simultaneous determination of paracetamol and dopamine

In this work, mesoporous carbons (MCs) were synthesized by a template method, and the schwertmannites (Schs) were prepared by a calcination method. They were mixed uniformly by ultrasound and obtained the Schs/MCs nanocomposites. The Schs/MCs/GCE can be used to detect paracetamol (PA) and dopamine (DA) simultaneously. Under the best terms, it exhibits wide linear range of 1.0 to 300 µM for PA and 1.0 to 400 µM for DA. The determination limits are 0.33 µM for PA and 0.24 µM for DA ( S / N  = 3), respectively. Besides, the sensor is expected to be used for detect PA and DA in pharmaceutical samples.