an electrochemical acetaminophen sensor based on la^3+/co3o4 nanoflowers modified graphite screen printed electrode architecture

In this study, the la^3+/co3o4 nanoflowers were synthesized by co-precipitation method. the morphology of the la^3+/co3o4nfs were characterized using scanning electron microscopy (sem), and were further used to modify the graphite screen printed electrode (gspe). the electrochemical behavior of acetaminophen at la3+/co3o4nfs/gspe has been studied in aqueous solutions. experimental results showed that the la3+/ co3o4nfs modified gspe possess excellent electrocatalytic activity toward the detection of acetaminophen. under optimum conditions, the la^3+/co3o4nfs modified electrode exhibited high sensitivity and stability to acetaminophen over a wide linear range of concentrations from 0.5μm to 250.0μm, with a detection limit of 0.09μm. finally, the proposed sensor was successfully applied to the detection of acetaminophen in real samples.