... themselves. • Easy to monitor mercury, arsenic, lead, zinc, cadmium, copper, and chromium, nickel, manganese, thallium, ferrum and other heavy metal ion monitoring ... : Parameter NameParameter ValuesPrinciple(ASV)Monitoring ionMercury,arsenic,lead,zinc,cadmium,copper,chromium,nickel,manganese,thallium,ferrum etc.Range0.5ppb~500ppmResolution ratio0.25ppbTime25 ...