Abstract
This study was aims to develop the new electrochemical method for the determination of Ni (II) using glassy carbon electrode. Three supporting electrolytes were used to find the peak of Ni (II), they were sodium chloride, acetic buffer solution, and ammonium choride. The peak of nickel was found in the condition of 0.1 M ammonium chloride solution (pH 4.5) as supporting electrolyte, deposition potential of -1.0 V (vs. Ag/AgCl) and a deposition time of 180 s, 10 s equilibration time, and the potential step, amplitude, and frequency were 25 mV, 5 mV, and 25 Hz , respectively. The anodic peak of Nickel was found at around -0.325 V. Then, the GCE was modified with 2-MBT and Bi (III) to increase the current. Both of chemicals were done in both in-situ and ex-situ techniques. The presence of Bi (III) in the electrochemical system can increase the current. It needs further experiment to get the best response of Ni (II) determination by ASV methods.
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