碳量子点荧光猝灭法检测铁离子  

Determination of Ferric Ions Based on Fluorescence Quenching of Carbon Dots

作　　者：刘雪萍[1] 杨娟[1] 白燕[1] 

机构地区：[1]暨南大学生命科学技术学院化学系,广州510000

出　　处：《分析化学》2016年第5期804-808,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金资助项目(No.21075053)~~

摘　　要：以甘油为碳源,采用一步水热法合成稳定性高,水溶性好的蓝色荧光碳量子点,基于Fe^(3+)对碳量子点的荧光猝灭效应,建立一种快速、选择性检测Fe^(3+)的新方法。研究表明,Fe^(3+)对碳量子点的荧光猝灭程度与Fe^(3+)浓度在0.005~1.2 mmol/L内呈良好的线性关系(R^2=0.995),检出限为2.2μmol/L。将其应用于补铁药中铁含量的测定,标准偏差为0.41 mg/tablet,加标回收率为95.5%~101.0%,其结果与邻二氮菲法测定结果相符。The water soluble carbon dots with high stability and excellent photoluminescent properties were synthesized by one-step hydrothermal treatment of glycerol. Based on the significant quenching effect of ferric ion on the fluorescence of carbon dots, a method with high sensitivity and good selectivity for the determination of ferric ion was established. The ratio of fluorescence intensities （Fo/F1 ） had a linear relationship with the concentration of ferric ion in the range of 0. 005-1.2 mmol/L （R2= 0. 995） and the 3-s detection limit was 2.2 μmol/L. Furthermore, the standard deviation and the recovery of the method for determination of iron in Iron tablets were 0.41 rag/tablet and 95.5%-101.0% , respectively. The detection result of this method for Fe3＋ ions was in agreement with that 1,10-phenanthroline spectrophotometry.

关 键 词：碳量子点 甘油 水热法 铁离子 

分 类 号：O657.3[理学—分析化学] O613.71[理学—化学]