摘要
本文报道了新三氮烯试剂２－羧基－４－硝基苯基重氮基偶氮苯的合成及其与镉的显色反应．在非离子表面活性剂ＴｒｉｔｏｎＸ—１００存在下．于ｐＨ１１．０的Ｎａ４Ｂ４ｏ３－ＮａＯＨ缓冲介质中．试剂可与镉生成２：１的红色配合物，其配台物的最大吸收波长位于５２０ｎｍ处，表观摩尔吸光系数ε为１．５６６×ｘ１０５Ｌ·ｍｏｌ－１．ｃｍ－１，镉量在０—１０μｇ／２５ｍｌ范围内符台比尔定律，方法用于标准水样及铝合金标样中微量用的测定，结果满意．
ynthesis of a new triazene reagent 2-carboxyl-4-nitrobenzenediazoaminoazobenzene and its color reacation with cadmium have been reported in thes paper.In the presence of nonionic sdrictant Triton X-100 and at PH 11.0 borax buffer solution.the reagent reacts with cadmium to form a red complex with a molar ratio of 2:1.The maxium wavelength of complex is at 520nm.Molar abasorptivity is found to be 1.56×105L.mol-1.cm-1.Beer's law is obeyed in the range of 0-10μg Cd(II) per 25ml solution.The method has been applied to determination of trace cadmium in standard water sample and aluminium alloy with satisfactory results.
出处
《淮北煤师院学报（自然科学版）》
1996年第3期31-34,38,共5页
Journal of Huaibei Teachers College(Natural Sciences Edition)
关键词
三氮烯试剂
分光光度法
显色反应
偶氮苯
镉
triazene reagent
synthesis
2-carboxyl-4-nitrobenzenediazoaminoazoobenzene
spectrophotometry
cadmium
