Nakayama M, Itoh K, Chikuma M, Sakurai H, Tanaka H
Department of Industrial Chemistry, Kumamoto University, 2-39-1 Kurokami, Kumamoto860, Japan.
Talanta. 1984 Apr;31(4):269-74. doi: 10.1016/0039-9140(84)80275-1.
A functional resin for the collection of selenium(IV) has been prepared simply by the conversion of a common ion-exchange resin with bismuthiol-II which has three functional properties, namely the capabilities of selective reaction with selenium(IV), ion-exchange reaction with ion-exchange resin and strong physical sorption to the ion-exchange resin matrix. The binding ratio of selenium(IV) to bismuthiol-II on the resin was confirmed to be 1:4. The reaction was represented as follows: 4RSH + H(2)SeO(3)--> R-S-Se-S-R + R-S-S-R + 3H(2)O. Highly selective sorption of selenium(IV) was achieved, based on the formation of stable selenotrisulphide on the resin. Selenium(IV) sorbed on bismuthiol-II resin was eluted effectively with 8-13M nitric acid or some thiols, such as cysteine and penicillamine. In the cases of thiols, the elution of selenium was found to be also based on the formation of selenotrisulphide, and the bismuthiol-II resin was regenerated. Satisfactory results were obtained when this resin was applied to the determination of selenium(IV) in river, estuarine or sea water samples.
一种用于收集硒（IV）的功能性树脂，是通过将一种普通离子交换树脂与具有三种功能特性的双硫腙-II进行转化而简单制备的，这三种功能特性分别是：与硒（IV）发生选择性反应的能力、与离子交换树脂发生离子交换反应的能力以及对离子交换树脂基质的强物理吸附能力。树脂上硒（IV）与双硫腙-II的结合比经证实为1:4。该反应表示如下：4RSH + H₂SeO₃ → R-S-Se-S-R + R-S-S-R + 3H₂O。基于在树脂上形成稳定的硒三硫化物，实现了对硒（IV）的高度选择性吸附。吸附在双硫腙-II树脂上的硒（IV）可用8 - 13M硝酸或一些硫醇（如半胱氨酸和青霉胺）有效洗脱。在硫醇的情况下，发现硒的洗脱也是基于硒三硫化物的形成，并且双硫腙-II树脂得以再生。当将这种树脂应用于测定河流、河口或海水样品中的硒（IV）时，获得了满意的结果。
