Abstract
The method previously described for the determination of Cd, Zn, Cu, Ni and Co in sediments has been adapted for the determination of these metals, and lead and silver in sea water and biological tissues. For sea water the only treatment preceding extraction is pH adjustment; biological tissues are digested in nitric and perchloric acids and the residue taken up in dilute hydrochloric acid prior to pH adjustment and extraction. The method is sufficiently sensitive to allow Cd, Zn, Cu and Ni to be determined in all sea waters, Co and Ag in coastal waters, but Pb only in polluted water.
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