The amplitude of EOG can be increased by Ca2+ in the polluted fish of single heavy metal, and the result shows Ca2+ to poisoned fish take on some detoxification, in addition, the sequence of detoxification is Hg2+>Cu2+>Zn2+>Cd2+.

• Ca~(2+)能使重金属中毒鱼的EOG幅值增高,反映其具有一定的解毒作用,效果顺序为Hg~(2+)>Cu~(2+)>Zn~(2+)>Cd~(2+);