2-(H酸偶氮)-4,5-二硝基酚光度法测定铝的研究和应用  

Study on Spectrophotometric Determination of Aluminium with 2-(H-acidazo)-4,5-dinitrophenol and Its Application

作　　者：马莎[1] 殷国健[1] 王亮[1] 尹家元[1] 陈江虹[1] 

机构地区：[1]云南大学化学系,云南昆明650091

出　　处：《云南大学学报（自然科学版）》2000年第6期457-459,共3页Journal of Yunnan University(Natural Sciences Edition)

基　　金：云南省教委科学研究基金资助项目!(9911139)

摘　　要：研究了新试剂 2 - (H酸偶氮 ) - 4,5 -二硝基酚 (HADNP)与铝的显色反应 ,在pH5 .3的六次甲基四胺 -盐酸缓冲介质中 ,HADNP与Al3+生成 3比 1的紫色络合物 ,λmax=5 70nm ,ε =3 .2 9× 10 4 L·mol-1·cm-1,Al质量浓度在 0～ 480 μg·L-1内符合比尔定律 ,方法用于水样测定 。Colour reaction of 2-(H-acidazo)-4,5-dinitrophenol(HADNP) with aluminium was studied.In pH5.3 (CH 2) 6N 4-HCl buffer solution,HADNP can react with Al 3+ to form a 3∶1 stable complex.The molar absorptivity is 3.29×10 4 L·mol -1 ·cm -1 at 570?nm.Beer's law is obeyed in the range of 0～480?μg·L -1 .This method can be applied to the determination of aluminium in water with satisfactory results.

关 键 词：2-(H酸偶氮)-4 5-二硝基酚 光度法 铝 显色反应 

分 类 号：O657.3[理学—分析化学]