铬(VI)-O-FPF-CTMAB-酒石酸钠荧光熄灭体系及其应用  

Fluorescence quenching reaction of chromium (VI)-O-fluorophenylfluorone-CTMAB-sodium tartrate system and Its analytical application

作　　者：马红燕[1] 

机构地区：[1]延安大学化学与化工系反应工程省级重点实验室,陕西延安716000

出　　处：《化学研究与应用》2003年第1期78-79,74,共3页Chemical Research and Application

基　　金：陕西省教委专项科研基金资助课题(99JK124)

摘　　要：A highly sensitive fluorescence quenching method for the determination of chromium(VI)based on the system of Cr(VI)OFluorophenylfluorone(OFPF)cetyltrimethylammonium bromide(CTMAB)sodium tartrate(Tartrate)was developed.In a pH 420～480 medium of HAcNaAc,chromium(VI)reacts with OFPF,CTMAB and Tartrate to form a nonfluorescent mixed complex and quenches the fluorescence intensity of OFPF.There is a linear relationship between fluorescence quenching intensity and concentration of chromium(VI)from 0 to 02μg/25ml.The detection limit for Cr(VI)is 01μg/L.The method has been applied to the determination of trace chromium(VI)in water samples with satisfactory results.A highly sensitive fluorescence quenching method for the determination of chromium(VI)based on the system of Cr(VI)OFluorophenylfluorone(OFPF)cetyltrimethylammonium bromide(CTMAB)sodium tartrate(Tartrate)was developed.In a pH 420～480 medium of HAcNaAc,chromium(VI)reacts with OFPF,CTMAB and Tartrate to form a nonfluorescent mixed complex and quenches the fluorescence intensity of OFPF.There is a linear relationship between fluorescence quenching intensity and concentration of chromium(VI)from 0 to 02μg/25ml.The detection limit for Cr(VI)is 01μg/L.The method has been applied to the determination of trace chromium(VI)in water samples with satisfactory results.

关 键 词：铬 邻氟苯基荧光酮 CTMAB 酒石酸钠 荧光熄灭法 

分 类 号：O657.3[理学—分析化学]