Abstract
Determinations of cadmium, copper, iron, manganese, molybdenum, nickel, vanadium and zinc have been carried out on water samples from the tropical north-east Atlantic Ocean, using a chelating ion-exchange concentration method followed by atomic absorption spectrophotometry, or for molybdenum and vanadium by colorimetry. The results indicate that cadmium, iron, manganese and nickel are relatively uniformly distributed in this area, whereas molybdenum, vanadium, zinc and to some extent copper show larger variations of a random nature.
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