采用吸附树脂Amberlite XAD-4从水溶液中富集痕量元素

本文采用短吸附柱(10×60mm,充填高度24mm)研究了非离子性吸附树脂AmberliteXAD-4从水溶液中对16种金属元素的氢氧化物,二硫代氨基甲酸衍生物的配合物和二甲酚橙配合物的吸附行为。难溶金属化合物在树脂上的吸附率与溶液pH值的关系与采用活性碳作吸附剂的情况十分相似。而含有亲水基团的二甲酚橙螯合物不被树脂吸附。对吸附于树脂上的痕量元素的洗脱以及采用火焰原子吸收光谱法测定丙酮富集液中的金属元素问题也进行了讨论。

Preconcentration of Trace Elements From Aqueous Solution With Amberlite XAD-4

The adsorptive behaviour of 16 elements in trace amounts as hydroxides and chelates of pyrrolidindithiocarbamidate of xylenol orange from aqueous solution on Amberlite XAD-4 resin was examined by using a short column. The dependence of the adsorbability of slightly water soluble metal compounds on the pH value of the solution is very similar to that with activated carbon as adsorbent. The chelates of xylenol orange containing hydrophile groups are not sorbed by the resin. Additionally, the elution of adsorbed trace compounds and the determination of trace elements in acetone solution by flame AAS were discussed.