Core–shell quantum dot ZnS/CdSe screen-printed
electrodes
were used to electrochemically measure human blood plasma levels of
exogenous adrenaline administered to cardiac arrest patients. The
electrochemical behavior of adrenaline on the modified electrode surface
was investigated using differential pulse voltammetry (DPV), cyclic
voltammetry, and electrochemical impedance spectroscopy (EIS). Under
optimal conditions, the linear working ranges of the modified electrode
were 0.001–3 μM (DPV) and 0.001–300 μM (EIS).
The best limit of detection for this concentration range was 2.79
× 10–8μM (DPV). The modified electrodes
showed good reproducibility, stability, and sensitivity and successfully
detected adrenaline levels.