A highly sensitive fluorescence quenching method for the determination of iron（Ⅲ）based on the system of iron（Ⅲ）-enoxacin-SDS has been developed.In NaAc-HAc medium,iron（Ⅲ）reacted with enoxacin and SDS to form ...A highly sensitive fluorescence quenching method for the determination of iron（Ⅲ）based on the system of iron（Ⅲ）-enoxacin-SDS has been developed.In NaAc-HAc medium,iron（Ⅲ）reacted with enoxacin and SDS to form a non-fluorescent mixed complex and quenches the fluorescence intensity of enoxacin.The experimental conditions that influence the fluorescent intensity were investigated and optimized.Under the optimum conditions the detection limit is 8.0×10-9mol/L.The linear range is 2.0×10-8-8.0×10-6mol/L.This method has been applied to the determination of trace iron（Ⅲ）in water and food samples with satisfactory results.展开更多
文摘A highly sensitive fluorescence quenching method for the determination of iron（Ⅲ）based on the system of iron（Ⅲ）-enoxacin-SDS has been developed.In NaAc-HAc medium,iron（Ⅲ）reacted with enoxacin and SDS to form a non-fluorescent mixed complex and quenches the fluorescence intensity of enoxacin.The experimental conditions that influence the fluorescent intensity were investigated and optimized.Under the optimum conditions the detection limit is 8.0×10-9mol/L.The linear range is 2.0×10-8-8.0×10-6mol/L.This method has been applied to the determination of trace iron（Ⅲ）in water and food samples with satisfactory results.
