▎ 摘　　要

A novel electrochemical method was developed for simultaneous determination of SY and Tz using metal-organic frameworks (MOFs) of NiBTC and reduced graphene oxide (rGO) to modify screen printed carbon electrodes (rGO/NiBTC/SPCEs). This sensor offers an inexpensive, rapid and sensitive method of determination for soft drinks. Under optimal conditions, the results of the rGO/NiBTC/SPCEs have good electron transfer characteristics and low electron transfer resistance, and they increase the oxidation current, as determined by differential pulse voltammetry (DPV) and electrochemical impedance analysis (EIS). In addition, the rGO/NiBTC modifiers were characterized by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), powder X-ray diffraction (PXRD) and Fourier-transform infrared spectroscopy (FTIR), which confirmed that the modifiers were successfully prepared. Surprisingly, the electrochemical response of the modified electrode was increased by approximately 35.6 and 33.4-fold for SY and Tz, respectively, relative to the unmodified electrode. The detection limits are 0.025 mu M and 0.05 mu M at S/N = 3, respectively.