Advances in Polymer Technology / 2021 / Article / Tab 2

Research Article

Poly(1,5-Diaminonaphthalene)-Modified Screen-Printed Device for Electrochemical Lead Ion Sensing

Table 2

Interferences of some metallic ions on the SWASV peak currents of 5.0 μg·L-1 Pb2+.

InterferentConcentration (μg·L-1)Peak current change (%)

Zn2+500-0.4
Mn2+500+0.9
Fe2+500-2.6
Cu2+20+4.5
Al3+500-3.1
Hg2+8+15.7

Electrolyte: acetate buffer (pH 4.5); deposition potential: -1.2 V; deposition time: 360 s; frequency: 50 Hz; amplitude: 50 mV; step potential: 5 mV.