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Fluorescence switching sensor for sensitive detection of sinapine using carbon quantum dots.
- Source :
-
Sensors & Actuators B: Chemical . Mar2017, Vol. 241, p482-488. 7p. - Publication Year :
- 2017
-
Abstract
- A new fluorescence switching sensor for sensitive detection of sinapine (SP) was developed based on aggregation and disaggregation of carbon quantum dots (CDs) with the assistance of copper ions (Cu 2+ ). In the detection, carboxyl group on the surface of CDs enables the aggregation triggered by Cu 2+ due to the effective coordination, inducing obvious fluorescence quenching. Upon the addition of SP into the solution, higher affinity between SP and Cu 2+ is found to from SP-Cu coordination complex, leading to re-dispersion and fluorescence recovery of CDs. The fluorescence switching sensor for SP detection has advantages of simplicity, rapidness, high sensitivity and selectivity. The quantitative range for SP detection is from 0.04 to 5 μg mL −1 with the detection limit of 0.02 μg mL −1 . In practical samples, the recoveries of the samples ranged from 87.9% to 117.0%. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FLUORESCENCE
*SINAPINE
*CARBON
*QUANTUM dots
*COPPER ions
*ELECTROCHEMICAL sensors
Subjects
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 241
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 120406166
- Full Text :
- https://doi.org/10.1016/j.snb.2016.10.108