[Bathocuproine disulfonic acid-loaded resin as a preconcentrating agent of trace mercury (author's transl)].
A chelating agent-loaded resin consisting of an anion exchange resin (Dowex 1 X-4) and bathocuproine disulfonic acid (BCS-resin) was prepared. The adsorption behavior of some chalcophile elements as a function of pH by the column method was studied, and mercury was shown to be adsorbed selectively to the BCS-resin at the pH region of 0.5 approximately 1.0, and the BCS-resin was found to be a specific collector for trace mercury in natural water samples before neutron activation analysis. The molar ratio of BCS to mercury(II) in the resin was confirmed to be 1:1 and the resulting chelate was stable at least within a month. The method was applied to the determination of mercury in the Watarase river water sample. The sample solution was adjusted to pH 1.0 with HNO3, filtered and flown through the column (BCS-resin: 4 x 10(-4) mol . g-1 . resin, 7 mm phi x 35 mmH) and the resin was then washed and dried in a desiccator. The monitor containing 10 micrograms of mercury was also prepared according to the above scheme. The samples and the monitor were irradiated together in the pneumatic tube of JRR-3 for 60 min (neutron flux: 2 x 10(13) n . cm-2 . s-1). After cooling for 15 days, gamma-activity of 203Hg was measured. The result was 21 +/- 3 ppt for mercury, indicating that the method was well applicable to the determination of trace mercury in river water samples.
D000837:Anion Exchange Resins; D005618:Fresh Water / Q000032:analysis; D007475:Ion Exchange Resins; D008628:Mercury / Q000032:analysis*; D009501:Neutron Activation Analysis; D010618:Phenanthrolines
D000837:Anion Exchange Resins; D007475:Ion Exchange Resins; D010618:Phenanthrolines; C030575:bathocuproine disulfonic acid-Dowex 1 X-4 resin; D008628:Mercury