新显色剂5-(6-硝基苯并噻唑偶氮)-8-氨基喹啉与镍显色反应的研究及应用

Study on Colour Reaction of Nickel with a New Reagent 5\|(6\|Nitro\| 2 \|Benzothiazoleazo)\| 8 \|Aminoquinoline and Application

研究了新显色剂５－（６－硝基苯并噻唑偶氮）－８－氨基喹啉与镍的显色反应。在阳离子表面活性剂十六烷基三甲基溴化铵存在下的弱碱性介质中，试剂与镍形成３∶１的蓝色配合物，其最大吸收波长位于６１５ｎｍ处，表观摩尔吸光系数为１．１３×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，镍含量在０－６μｇ／２５ｍＬ范围内符合比耳定律。方法应用于铝合金中镍的测定。

A highly sensitive spectrophotometric method for determination of nickel by new chromogenic reagent 5\|(6\|nitro\|2\|benzothiazoleazo)\|8\|aminoquinoline(NBTAQ)has been developed.In the presence of CTMAB and borax buffer solution,nickle forms a blue 13(nickelNBTAQ)complex with NBTAQ which has an wavelength of maximum absorption at 615nm.The molar absorptivity is 1.13105 Lmol-1cm-1.Beer's law is obeyed for nickel in the concentration range 0-6g/25mL of solution.Trace amounts of nickel in aluminum alloy has been satisfactorily determined by the method.