Dear Sir,

when running CV in Acetate buffer using Bare GCE, at -0.5V reduction Peak is observed on Bare GCE, to remove contamination on Bare GCE, run CV in 0.5MH2So4 100mV/s Scan rate, potential range from -1.0 to 0.5 Volts, again Polished with alumina slurry, slight improvement is there, but not removed fully, After CV run in 0.5MH2So4, CV performed in Acetate buffer(pH:4.6), Phosphate buffer (pH:7.2), Peak is there at -0.5V, how to remove the Peak fully from GCE. Requesting you to help me to remove the peak fully.

Thank you