Preparation of carbon quantum dots from cigarette filters and its application for fluorescence detection of Sudan I.

Preparation of carbon quantum dots from cigarette filters and its application for fluorescence detection of Sudan I.
Anal Chim Acta. 2018 Sep 06;1023:115-120
Authors: Anmei S, Qingmei Z, Yuye C, Yilin W
Abstract
Carbon quantum dots (CQDs) with quantum yield of 14% were successfully synthesized via a simple, low-cost, and green hydrothermal treatment using cigarette filters as carbon source for the first time. The obtained CQDs showed a strong emission at the wavelength of 465 nm, with an optimum excitation of 365 nm.Sudan I with maximum absorption wavelength at 477 nm could selectively quench the fluorescence of CQDs. Based on this principle, a fluorescence probe was developed for Sudan I determination. Furthermore, the quenching mechanism of the CQDs was elucidated. A linear relationship was found in the range of 2.40-104.0 μmol/L Sudan I with the detection limit (3σ/k) of 0.95 μmol/L. Satisfactory results were achieved when the method was submitted to the determination of Sudan I in food samples.
PMID: 29754601 [PubMed - in process]

Source: Analytica Chimica Acta - May 16, 2018 Category: Chemistry Authors: Anmei S, Qingmei Z, Yuye C, Yilin W Tags: Anal Chim Acta Source Type: research