发光学报2017，Vol.38Issue(1)：124-131,8.DOI:10.3788/fgxb20173801.0124
基于石墨烯量子点的荧光探针应用于抗坏血酸检测的研究
Detection of Ascorbic Acid by Fluorescence Probe Based on Graphene Quantum Dots
摘要
Abstract
A label-free fluorescence method based on the fluorescence property of graphene quantum dots (GQDs) was developed for sensitive and selective detection of ascorbic acid (AA). The initial strong blue fluorescence of the GQDs in aqueous solution was effectively quenched upon addition of AA. The quenching mechanism may involve transfer of electrons from AA to GQDs via the redox re-action of AA and GQDs in weak acid solution. The quenching efficiency was linearly proportional to the concentration of AA within the range of 5. 0 × 10 - 6 - 7. 5 × 10 - 5 mol/ L with a low detection limit down to 1. 0 × 10 - 6 mol/ L. The proposed sensing system is simple and low-cost with facile experi-mental operations, and has a high selectivity for AA over a number of possible interfering species. Additionally, this method was successfully applied to the determination of AA in biological samples with satisfactory recoveries (95. 2% - 115. 3% ).关键词
石墨烯量子点/荧光探针/非标记方法/抗坏血酸Key words
graphene quantum dots/fluorescence probe/label-free method/ascorbic acid分类
数理科学引用本文复制引用
赵丽敏,陈丽妮,赵书林..基于石墨烯量子点的荧光探针应用于抗坏血酸检测的研究[J].发光学报,2017,38(1):124-131,8.基金项目
国家自然科学基金(21305020,21175030)；广西自然科学基金(2014GXNSFBA118041)资助项目Supported by Natural Science Foundation of China(21305020,21175030)； Natural Science Foundation of Guangxi Province of China(2014GXNSFBA118041) （21305020,21175030）
