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本文介绍了3,6-双[(2-胂羧基苯)偶氮]-4,5-二羟基-2,7-萘二磺酰苯胺(偶氮胂-DAL)改性硅胶的制备方法,研究了它的性质及其富集,分离Ti(Ⅳ),Zr(Ⅳ)、Hf(Ⅳ)的工作。研究结果表明,偶氮胂-DAL改性硅胶在6mol/L HClpH4.0的溶液中是稳定的;其对Zr(Ⅳ)的最大吸附量为20.9μmol/g;在1mol/L HCl介质中,经偶氮胂-DAL-SG柱预富集处理后,可将Zr(Ⅳ)、Hf(Ⅳ)与Ti(Ⅳ)、贵金属、常见过渡元素,稀土元素等金属离子直接分离,用普通分光光度法测定人工水样中Zr(Ⅳ)的下限可达10~(-9)g/g。
This paper introduces the preparation of 3,6-bis [(2-arsarboxybenzene) azo] -4,5-dihydroxy-2,7-naphthalene disulfonanilide (arsenazo-DAL) Its properties and its enrichment, separation of Ti (Ⅳ), Zr (Ⅳ), Hf (Ⅳ) were studied. The results showed that arsenazo-DAL modified silica gel was stable in 6mol / L HCl pH4 solution and the maximum adsorption capacity of Zr (Ⅳ) was 20.9μmol / g. In 1mol / L HCl medium, The metal ions such as Zr (Ⅳ), Hf (Ⅳ) and Ti (Ⅳ), noble metals, common transition elements and rare earth elements can be separated directly by arsenazo-DAL-SG column preconcentration, Determination of artificial water samples Zr (Ⅳ) the lower limit of up to 10 ~ (-9) g / g.