Sinko, I Determination of lead, cadmium, copper and zinc in biological materials by anodic stripping polarography. [electronic resource] - International journal of environmental analytical chemistry Nov 1972 - 167-78 p. digital Publication Type: Journal Article ISSN: 0306-7319 Standard No.: 10.1080/03067317208073256 doi Subjects--Topical Terms: Cadmium--analysisCopper--analysisHydrogen-Ion ConcentrationLead--analysisPlantsPolarographyZinc--analysis