期刊
RSC ADVANCES
卷 6, 期 89, 页码 85820-85828出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra10115a
关键词
-
资金
- Development Program of the Ministry of Science and Technology of Jilin Province, China [20150204070GX]
Fluorescent CDs were prepared by using thiourea as the carbon source and diethylene glycol as the reaction medium. The CDs were obtained only within three minutes under microwave irradiation and their particle size was mainly distributed in the range of 1.5-3.5 nm. The average particle size was 2.3 nm with a standard deviation of 0.5 nm. The fluorescence of the CDs could be quenched by Cu2+ through the static quenching mechanism. On this basis, the CDs can be used as a fluorescence probe for detection of Cu2+ in a linear range of 0.2-25 mmol L-1, and the limit of detection was 0.05 mu mol L-1. The quenched fluorescence of the CDs could be recovered with the addition of glyphosate based on a competitive affinity for Cu2+ between glyphosate and the functional groups on the surface of CDs, which provides a turn-on sensing strategy for determination of glyphosate. Under the optimal conditions, the linear range of the method was 0.03-10 mu g mL(-1) with a detection limit of 16 ng mL(-1). Finally, this fluorescence probe was successfully applied to the direct determination of glyphosate in environmental water samples and satisfactory results were obtained.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据