Activation Analysis of Manganese and Zinc in Sea WATER1

The use of activation analysis for the determination of microgram quantities of Mn and Zn in sea water was investigated. Total Mn and Zn were separated from the other elements of sea water by coprecipitation with iron as hydroxide, and divalent Mn and Zn were separated by extraction with diethyldithiocarbamate. Analyses were made from samples of water from different locations and depths of the North Pacific, Atlantic, and the Gulf of Mexico. Evidence indicates a substantial portion of Mn and Zn is held in sea water in a non-dialyzable and non-extractable form.