ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 38, Number 12
JKCSEZ 38(12)
December 20, 1994 

The solvent extraction of an inorganic trace mercury in sea water samples was studied using zinc diethyldithiocabamate Zn(DDC)2 as chelating agent. The Zn(DDC)2 which maintained the stability of DDC- in the acidic aqueous solution in the course of extraction was synthesized from NaDDC and ZnSO4 in this laboratory. The trace of mercury(Ⅱ) was extracted at pH 3.0 from 100 ml of sea water into 10ml of chloroform containing 0.05 M Zn(DDC)2 by shaking for 5 minutes. And from the organic phase, the Hg(DDC)2 was back-extracted into 10ml of 1 to 1 mixed acid of each 3% (v/v) nitric acid and hydrochloric acid by shaking for 25 minutes. The mercury back-extracted was determined by a cold vapor atomic absorption spectrophotometry. The trace mercury(Ⅱ) was so successfully extracted that this procedure could be applied to its determination in the sea water. That is, the recoveries of mercury in two kinds of samples into which as given amount of Hg(Ⅱ) was spiked were 90.0% and 93.3%, respectively.