邻硝基苯基荧光酮一十六烷基三甲基溴化铵双波长增敏法测定微量铝(Ⅲ)  

DETEMINATION OF ALUMINUM BY USING DUAL-WAVELENGTH SPECTROPHOTOMETRIC METHOD WITH THE PRESENCE OF O-NITROPHENYLFLUORONE AND CETYLTRIMETHYLAMMONIUM BROMIDE

作　　者：许逸敏[1] 陈永晖[1] 

机构地区：[1]南昌大学化学系,江西南昌330047

出　　处：《南昌大学学报（理科版）》2001年第1期72-75,共4页Journal of Nanchang University(Natural Science)

摘　　要：研究了HAC -NaAC缓冲体系中 ,邻硝基苯基荧光酮、十六烷基三甲基溴化铵与铝形成三元络合物 ,以试剂的最大吸收 52 7nm为参比波长 (λ) ,以络合物的最大吸收 570nm为测量波长(λ2 ) ,用双波长增敏法测得表观摩尔吸光系数为 1.4× 10 5,络合物的组成比为 1∶1∶1,铝量在 0～ 10μg/ 2 5mL范围内符合比尔定律。方法用于发酵粉等样品中铝的测定 。This article reported that o-nitrophenylfluorone and cetyltrimethylammonium bromide combine with aluminium to form complex as a sensitive reaction for aluminium using dual wavelength increasing sensitivity method.In acetic acid-sodium acetic,the reagent has maximum absorbance at 527 nm(λ 1),the complex at 570 nm(λ 2).The apparent molar absorptivity is 1.4×10 5.The composition of complex is 1∶1∶1,Beer's law is obeyed in the range of 0-10 μg/25 mL for Al.The method is applied to the determination of aluminium in yeast powder with satisfactory results.

关 键 词：邻硝基苯基荧光酮 十六烷基三甲基溴化铵 铝 双波长增敏法 含量测定 摩尔吸光系数 

分 类 号：O657.3[理学—分析化学] O614.31[理学—化学]