摘要
研究了新显色剂2-(2-胂酸基苯偶氮)-7-(2,6-二碘-4-硝基苯偶氮)-1,8-二羟基-3,6-萘二磺酸与锆的显色反应.在1.92mol/LHCl介质中,试剂与锆生成蓝色配合物,最大吸收波长633nm,摩尔吸光系数为4.37×104L/(mol·cm),显色酸度高,常见的共存离子允许量特别大,选择性好.0～20μg/(25mL)Zr(IV)符合比耳定律,以NaF褪色试样空白为参比,直接吸光光度法测定合金钢中的微量锆,方法简便,结果可靠.
A new chromogenic reagent , 2-(2-arsonophenylazo)-7-(2,6-diiodo-4-nitrophenylazo)-1,8-dihydroxynaphthalene-3,6-disulfonic acid ,has been used in the spectrophotometric determination of zirconium. In 1.92 mol/L HCl,the reagent reacts with zirconium(IV) to form a deep blue complex with a maximum absorption at 633nm. The apparent molar absorptivity is 4.37×10~4 L/(mol·cm).Beer′s law is obeyed over the zirconium concentration range 0～20 μg/25 mL ,macroamounts of foreign ions do not interfere. The proposed method has been applied to the determination of zirconium in alloy steel without prior treatment with satisfactory results.
出处
《湖北民族学院学报（自然科学版）》
CAS
2004年第1期39-42,共4页
Journal of Hubei Minzu University(Natural Science Edition)
基金
湖北省教育厅重点项目(2002008010).
关键词
2
6-二碘-4-硝基偶氮胂
锆
吸光光度法
合金钢
2-(2-arsonophenylazo)-7-(2,6-diiodo-4-nitrophenylazo)-1
spectrophotometry
zirconium
alloy steel
