A Disposable Copper (II) Ion Biosensor Based on Self-Assembly of L-Cysteine on Gold Nanoparticle-Modified Screen-Printed Carbon Electrode

Table 1

Interference of various metal ions on the response of Cu²⁺ sensor based on L-cysteine assembled on gold nanoparticles of a modified screen-printed carbon electrode.

Ion	Peak current (μA)	Current differences in the presence of 2 ppm Cu^2+ (%)
Co^2+	1.11	38.99
Ni^2+	0.23	6.61
Zn^2+	0.45	13.65
Pb^2+	1.11	38.99
Al^3+	0.66	18.60