Abstract
A microgram amount of manganese, nickel and zinc contained in sea water and common salt were determined by atomic absorption spectrophotometry in conjunction with extraction technique. These metals formed complexes with 2-hydroxy-1-naphthaldehyde-4-phenyl-3-thiosemicarbazone (HNA·PS), and they were extracted into chloroform and then extracted back with 1M hydrochloric acid into aqueous phase. The solution resulted therefrom was sprayed into an acetylene-air flame. To find the optimum condition for the extraction of these metals, the effect of pH, concentration of HNA·PS, shaking time, and effect of diverse substances were examined. Less than 10μg of these metals were quantitatively extracted into 10 ml of 2.5×10-4M HNA·PS chloroform solution from aqueous solution at pH 9.6, by shaking for 10 min. Good recoveries of metals added to artificial sea water and sea water samples are demonstrated.
