CIS/CdS Electrodeposition Photocathode p-n junction Surface modification Solar hydrogen

چکیده مقاله

An analytical methodology based on differential pulse voltammetry (DPV) on an Au nanoparticles modified
carbon paste electrode (AuNPs/CPE) and the partial least-squares (PLS) algorithm for the determination
of tryptophan (Trp) in the presence of unexpected electroactive interference, tyrosine (Tyr) with
overlapped peaks, in serum samples was described. At first, the synthesized Au nanoparticles were characterized
by scanning electron microscopy (SEM) and the suitability of AuNPs/CPE for determination of
Trp in the presence of Tyr was checked using electrochemical impedance spectroscopy (EIS) and cyclic
voltammetry (CV). Then experimental conditions were optimized with central composite rotatable
design (CCRD) and response surface methodology (RSM), involving several chemical and instrumental
variables. After optimization, the resolution of the two multicomponent mixtures has been accomplished
by PLS for voltammmetric studies of Trp. Finally, the proposed method was found to be applicable for the
analysis of the Trp in the presence of unexpected interference in serum sample