Characterization of cysteamine self assembled on gold functionalized with nitrilotriacetic acid and evaluation of copper(II) binding capacity with adsorption transfer stripping voltammetry

摘要: Abstract A self assembled monolayer of cysteamine was prepared on the surface gold disc electrode and further modified with nitrilotriacetic acid. Modified characterized cyclic voltammetry electrochemical impedance spectroscopy in presence potassium hexacyanoferrate(II)/(III). Thus tested for determination Cu2+ adsorption transfer stripping voltammetry. The binding onto successfully performed a wide range concentrations. Electrode response (log Ip) linearly proportional to −log c(Cu2+) correlation coefficient R2 = 0.9759. detection limit 1 · 10 - 8 M . influence interfering substances (Mg2+, Mn2+, Co2+, Ni2+ Pb2+) it found that Mg2+ Pb2+ do not interfere while Co2+ show slight interference. Real-world testing copper content urine samples confirmed practical application sensor.