The interference caused by various amino acids and some other substances in the proteose peptone medium adsorbed in the surface of the mercury film electrode can be eliminated by using exchange of medium during the stripping step 通过使用交换介质法，较好消除了由于蛋白胨细胞生长液中各种氨基酸或其它组分吸附在汞膜表面而引起的干扰。
