O-FPF-CTMAB荧光熄灭法测定微量铁的研究  

Study on the fluoro-quenching method for the determination of trace iron with o-fluorophenylfluorone in the presence of CTMAB

作　　者：马红燕[1] 张社争[1] 

机构地区：[1]延安大学化学与化工系,陕西延安716000

出　　处：《延安大学学报（自然科学版）》2001年第4期42-44,共3页Journal of Yan'an University：Natural Science Edition

基　　金：陕西省教委专项科研基金资助课题 (编号 99JK12 4)

摘　　要：研究了邻氟苯基荧光酮与铁 ( )的反应条件。在 p H5 .0 - 5 .4的 Na Ac—HAc缓冲溶液中 ,在表面活性剂 CTMAB存在下 ,铁 ( )与试剂生成配合物使试剂的荧光熄灭 ,建立了 Fe( ) -O- FPF- CTMAB体系测定微量铁的荧光光度新方法。荧光强度与 Fe( )的含量在 0— 2 .5 ug/2 5m L范围内呈线性关系 ,方法的检出限为 1 .2μg/L。该方法灵敏度高 ,操作简便 ,用于自来水和人发样中微量铁的测定 ,结果满意。A new method for fluoro-quenching determination of trace Fe(Ⅲ) with O-FPF and CTMAB has be described.The optimum condition is studied.Rectilinear range is 0-2.5 ug/25 mL at pH 5.0-5.4.The molar ratio of Fe(Ⅲ) to o-FPF and CTMAB is 1:3:2.The excitation and emission wavelengths are 365 nm and 561 nm.The detection limit for Fe(Ⅲ) is 1.2ug/L.This method has been applied to the determination of trace Fe(Ⅲ) in tap water and hair samples with satisfactory results.

关 键 词：铁 邻氟苯基光酮 溴化十六烷基三甲铵 荧光熄灭 O-FPF-CTMAB 

分 类 号：O641.811[理学—物理化学] O657.3[理学—化学]