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为了说明环境里各种水中硒的氧化态的分布,分别测定Se(VI)和Se(VI)是必要的。Se(VI)可通过浓盐酸或氢溴酸回馏还原成Se(IV)进行测定。此法需要处理大量环境样品是很麻烦的。因此,人们迫切需要一种直接分离和测定Se(VI)的方法。作者用4-肼基苯磺酸和二硫化碳合成了铋试剂-Ⅱ磺酸盐(缩写为bis-IIS),将其水溶液与阴离子交换树脂混合,制成具有一定功能的阴离子交换树脂。利用这种树脂,可直接测定Se(VI)和Se(IV)。经实验证实,Se(IV)在0.3～2.0 M HCl介质中,通过bis-
Se (VI) and Se (VI) measurements were necessary to illustrate the distribution of selenium oxidation states in various waters in the environment. Se (VI) can be determined by the distillative reduction of concentrated hydrochloric acid or hydrobromic acid to Se (IV). This method requires a lot of environmental samples is very troublesome. Therefore, there is an urgent need for a method for the direct separation and determination of Se (VI). The authors synthesized bismuth reagent-II sulfonate (abbreviated as bis-IIS) with 4-hydrazinobenzenesulfonic acid and carbon disulfide and mixed its aqueous solution with anion exchange resin to make anion exchange resin with certain functions. With this resin, Se (VI) and Se (IV) can be measured directly. Se (IV) was confirmed by experiments in 0.3 ~ 2.0 M HCl medium by bis-