摘要
本文研究了在氯化十六烷基呲啶(CPC)存在下,锑(111)与 O-NPF 的显色反应及其分析应用.试验表明,在0.1～0.32N HNO_3介质中,锑与 O-NPF 形成稳定的橙红色络合物,其最大吸收波长λ_(mαx)为520nm.络合物中 Sb∶O-NPF=1∶1.表观摩尔吸光系ε_(520)=9.81×10~4l·mol^(-1)·cm^(-1).锑含量在0～30ug/25ml 符合比尔定律.对一些常见离子的干扰及其消除进行了研究.所拟方法可不经分离,直接测定铜合金及金属材料中的微量锑,结果满意.
The reaction of antimony with O-nitrophenylfluorone in the presenceof cetyl Pyridinium chloride is studied and a methodf or determination ofmicroamounts of Sb directly from aqueous solution is proposed withoutprevious separation.In 0.1～0.32N nitric acid medium,in the presenceof CPC,Sb and O-NPF a stable orange-red complex can be for med withmaximum sbsorption at 520nm.The apparent molar absorptivity of thiscomplex is 9.81x10_4 lmol^(-1)·cm^(-1).The molar ratio of the complex hasbeen estimated to be Sb(111):O-NPF=1:1.Beer's law is obeyed from0～30μg/25ml.Most of the other cations do not interfere.The methodhas been applied to the determination of Sb in copper-base alloy withsatisfactory results.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
1989年第4期69-72,共4页
Journal of Lanzhou University(Natural Sciences)
