In the HAc-NaAc buffer solution in which the pH value was 6 and Br - existed,there was a sharp notch [1] of Hg 2+ at the gold electrode,and it could indicate the terminal point of the titration.

• 在pH =6的HAc-NaAc缓冲溶液中并有Br-存在时,Hg2 + 在金电极上有敏锐的切口[1 ] ,可用于指示终点。