A (SiPy+Cl/CuTsPc)5 layer-by-layer film was employed for the electroanalytical determination of promethazine hydrochloride in BR buffer pH 5.0 with peaks at 0.48 and 0.79 V. After optimisation of the square-wave parameters (f=100 s1, a=40 mV and ΔEs=2 mV), the peak at 0.79 V was...