摘要
研究了新显色剂2,6-二碘-4-硝基偶氮胂[化学名称为2-(2-胂酸基苯偶氯)-7-(2,6-二碘-4-硝基苯偶氯)-1,8-二羟基-3,6-萘二磺酸]与钛的显色反应.在1.50mol/L HCl介质中,试剂与钛生成深色配合物,最大吸收波长611nm,摩尔吸光系数为3.89×10^4L·mol^-1·cm^-1,显色酸度较高,常见共存离子允许量大,选择性较好,0—18μg/25mL Ti(Ⅳ)符合比耳定律,直接吸光光度法测定合金钢中的微量钛.
2 - ( 2 - arsonophenylazo) - 7 - ( 2,6 - diiodo - 4 - nitrophenylazo) - 1,8 - dihydroxynaphthalene - 3, 6 -disulfonic acid , has been used in the spectrophotometric determination of titanium. In 1.50mol · L^-1 HCl, the reagent reacts with titanium(Ⅳ) to form a deep blue complex with a maximum absorption at 611 nm. The apparent molar absorptivity is 3.98 × 10^4L · mol^-1·cm^-1. Beer's law is obeyed over the titanium concentration range 0 ~ 18μg/25 mL, macroamounts of foreign ions do not interfere. The proposed method has been applied to the determination of titanium 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
2006年第1期82-84,共3页
Journal of Hubei Minzu University(Natural Science Edition)
关键词
2
6-二碘-4-硝基偶氯胂
钛
吸光光度法
合金钢
2 - ( 2 - arsonophenylazo) - 7 - ( 2,6 - diiodo - 4 - nitrophenylazo) - 1,8 - dihydroxynaphthalene -3,6 - disulfonic acid
spectrophotometry
titanium
alloy steel