Akaiwa H, Kawamoto H, Ogura K
Radioisotopes. 1980 Nov;29(11):521-5.
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.
制备了一种由阴离子交换树脂（Dowex 1 X - 4）和 bathocuproine 二磺酸（BCS - 树脂）组成的负载螯合剂的树脂。采用柱法研究了一些亲铜元素的吸附行为与 pH 的关系，结果表明，在 pH 约为 0.5 至 1.0 的区域，汞能被选择性地吸附到 BCS - 树脂上，并且发现 BCS - 树脂是天然水样中痕量汞在中子活化分析前的特效捕集剂。树脂中 BCS 与汞（II）的摩尔比经确认是 1:1，生成的螯合物至少在一个月内是稳定的。该方法应用于测定渡良濑河河水样中的汞。用硝酸将样品溶液调节至 pH 1.0，过滤后流经柱子（BCS - 树脂：4×10⁻⁴ mol·g⁻¹·树脂，内径 7 mm×高 35 mm），然后将树脂洗涤并在干燥器中干燥。还按照上述方案制备了含 10 微克汞的监测样。样品和监测样在 JRR - 3 的气动输送管中一起辐照 60 分钟（中子通量：2×10¹³ n·cm⁻²·s⁻¹）。冷却 15 天后，测量²⁰³Hg 的γ活性。汞的测定结果为 21±3 ppt，表明该方法非常适用于测定河流水样中的痕量汞。
