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(A) Alanine concentration effect on the SWASV response of 100 μM Zn2+, 75 μM Cd2+, 50 μM Cu2+, and 75 μM Hg2+ ions in BRB of pH = 4, keeping scan rate = 100 mV/s, deposition time = 5 s, deposition potential = −1.3 V by electrochemical assisted modification of GC electrode surface with different concentrations of alanine solution. (B) Plot of Ip vs alanine (modifier) concentration.
