A ratiometric sensor based on dual-emission carbon dots sensitive detection of amaranth

Lin Yuan; Lizhen Liu; Zhi Mi; Meng Chen; Yunfeng Bai; Jun Qin; Feng Feng

doi:10.1016/j.saa.2023.123058

A ratiometric sensor based on dual-emission carbon dots sensitive detection of amaranth

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Dec 5:302:123058. doi: 10.1016/j.saa.2023.123058. Epub 2023 Jun 20.

Authors

Lin Yuan¹, Lizhen Liu², Zhi Mi¹, Meng Chen¹, Yunfeng Bai¹, Jun Qin¹, Feng Feng³

Affiliations

¹ School of Chemistry and Chemical Engineering, Shanxi Provincial Key Laboratory of Chemical Biosensing, Shanxi Datong University, Datong 037009, PR China.
² School of Chemistry and Chemical Engineering, Shanxi Provincial Key Laboratory of Chemical Biosensing, Shanxi Datong University, Datong 037009, PR China. Electronic address: liulizhen2009@126.com.
³ School of Chemistry and Chemical Engineering, Shanxi Provincial Key Laboratory of Chemical Biosensing, Shanxi Datong University, Datong 037009, PR China; School Department of Energy Chemistry and Materials Engineering, Shanxi Institute of Energy, Taiyuan 030600, PR China. Electronic address: feng-feng64@263.net.

PMID: 37393669
DOI: 10.1016/j.saa.2023.123058

Abstract

Amaranth (AMA), a common food additive, is important to strictly control the content of food for the human body. In this paper, an innovative method based on intrinsic dual-emissive carbon dots (Y/B-CDs) was used to detect AMA. Y/B-CDs have two emission wavelengths at 416 and 544 nm with the excitation wavelength at 362 nm. The addition of AMA can rapidly quench the fluorescence of the two peaks with different degrees, and ratiometric detection can be achieved. Quantitative analysis showed two linear ranges of 0.1-20 μM and 20-80 μM, and detection limits are 42 and 33 nM, respectively. Moreover, good results were obtained for the detection of AMA in beverages and candy using Y/B-CDs. This suggests that the constructed sensor has the potential to detect AMA in real samples.

Keywords: Amaranth; Beverages; Dual-emission carbon dots; Ratiometric sensor.

MeSH terms

Beverages
Carbon
Fluorescence
Fluorescent Dyes
Humans
Limit of Detection
Quantum Dots*

Substances

Carbon
Fluorescent Dyes