摘要
研究了在表面活性剂存在下,铌与邻氯苯基荧光酮(o-Cl-PF)的显色反应条件,在0.12～0.32mol·L-1盐酸介质中,Nb( )与o-Cl-PF生成桔红色络合物,其最大吸收波长为533nm,摩尔吸光系数为1.86×105,在络合物中,Nb∶o-Cl-PF=1∶2,所拟新方法用于合金钢中微量铌的测定,结果满意.
It is found that in 0.12~0.32 mol·L-1 HCl medium,Niobium(Ⅴ) reacts with ochlorophenylfluorone (oClPF) in the presence of Tween40 to form an orangered colored complex with a maximum absorption at 533 nm.The apparent molar absorption is found to be 1.86×105 L·mol-1·cm-1.The molar ratio of Nb(Ⅴ) to oClPF in the complex is found to be 1∶2.Beer′s law is obeyed in the range of 0~4.0 μg Nb/10ml.The interference of microamounts of Ti,Cr can be eliminated by masking.The method has been used for direct determination of trace Nb(Ⅴ) in alloy steels with satisfactory results.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第6期655-657,共3页
Journal of Inner Mongolia University：Natural Science Edition
基金
内蒙古自然科学基金资助项目(990301)
