铬(VI)-O-FPF-CTMAB-酒石酸钠荧光熄灭体系及其应用

• 作 者: 马红燕
• 机 构: 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
• 发表日期: 2003年01期
• 关键词: 铬 邻氟苯基荧光酮 CTMAB 酒石酸钠 荧光熄灭法

A highly sensitive fluorescence quenching method for the determination of chromium(VI)based on the system of Cr(VI)OFluorophenylfluorone(OFPF)cetyltrimethylammonium bromide(CTMAB)sodium tartrate(Tartrate)was developed.In a pH 420～480 medium of HAcNaAc,chromium(VI)reacts with OFPF,CTMAB and Tartrate to form a nonfluorescent mixed complex and quenches the fluorescence intensity of OFPF.There is a linear relationship between fluorescence quenching intensity and concentration of chromium(VI)from 0 to 02μg/25ml.The detection limit for Cr(VI)is 01μg/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) OFluorophenylfluorone (OFPF) cetyltrimethylammonium bromide (CTMAB) sodium tartrate (Tartrate) was developed. 420 ~ 480 medium of HAcNaAc, chromium (VI) reacts with OFPF, CTMAB and Tartrate to form a nonfluorescent mixed complex and quenches the fluorescence intensity of OFPF.There is a linear relationship between The method has been applied to the determination of trace chromium (VI) in water. The fluorescence quenching intensity and concentration of chromium (VI) from 0 to 0.2 μg / 25 ml. samples with satisfactory results. 