| Abstract: | The substoichiometric extraction of Hg2+ using diethyldithiocarbamic acid and 203Hg tracer was studied. Chloroform was employed to remove the complexes from the aqueous media which were 0.5M H2SO4 or 1 M HClO4 and 0 to 5 M NaCL. - Systems containing Cl? allowed extraction of Hg2+ for all DDC/Hg molar ratios, the extracted complexes being HgCl(DDC) and Hg(DDC)2. Their exchange constant was determined. - In the absence of Cl?, no extraction could be effected in either system if the DDC/Hg molar ratio was < 1; the H2SO4 system remained clear, whereas a precipitate of HgClO4(DDC) formed in the HClO4 system. For molar ratios > 1, the extraction of Hg2+ increased linearly with the addition of DDC, the extracted complex being Hg(DDC)2. |
