新试剂MBTAHQ的合成及与镍的显色反应研究  

SYNTHESIS OF A NEW COLOUR REAGENT 5-(6-METHOXY-2-BENZOTHIAZOLEAZO)-8-HYDROXYQUINOLINE AND SPECTROPHOTOMETRIC DETERMINATION OF NICKEL

作　　者：刘典梅[1] 李舒婷[1] 赵书林[1] 周能 

机构地区：[1]广西师范大学化学化工系,广西桂林541004

出　　处：《广西师范大学学报（自然科学版）》2002年第4期71-74,共4页Journal of Guangxi Normal University:Natural Science Edition

基　　金：广西自然科学基金资助项目(9811026)

摘　　要：合成了新显色剂5-(6-甲氧基苯并噻唑偶氮)-8-羟基喹啉(MBTAHQ),分子式C17H12N4O2S,相对分子质量336.37,熔点227～228°C.详细研究了该试剂与镍显色反应的条件及分光光度性能.在弱酸性介质中,有非离子表面活性剂存在下,试剂与镍形成2∶1的紫红色络合物,最大吸收波长位于575nm处,表观摩尔吸光系数为1.46×105L·mol-1·cm-1.镍的浓度在0～240μg/L范围内服从比尔定律.显色体系灵敏度高,应用于铝合金中镍含量的测定,结果满意.The synthesis of 5(6methoxy2benzothiazoleazo)8hydroxyquinoline (MBTAHQ),and the conditions of colour reaction with Ni(Ⅱ) are reported.The results show that the colour reagent reacts with Ni(Ⅱ) to form a kind of purplish red complex in the presence of OP at pH5.5 acesate buffer solution.The composition of complex is n(Ni)∶n(MBTAHQ)=1∶2.The wavelength of maximum absorbance of Ni(Ⅱ)MBTAHQ is 575nm,and its apparent molar absorptivity is 1.46×105L·mol-1·cm-1.Beer's law is obeyed in the range of 0～240μg/L.The method has been applied to the determination of nickel in aluminium alloy with satisfactory results.

关 键 词：MBTAHQ 显色反应 镍 合成 显色剂 5-(6-甲氧基苯并噻唑偶氮)-8-羟基喹啉 

分 类 号：O657.32[理学—分析化学]