A nanocomposite probe consisting of carbon quantum dots and phosphotungstic acid for fluorometric determination of chromate(VI) with improved selectivity

2018 ◽  
Vol 185 (10) ◽  
Author(s):  
Yushan Liu ◽  
Zhijun Chen ◽  
Wei Li ◽  
Chunhui Ma ◽  
Peng Wu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Phosphotungstic Acid ◽  
Carbon Quantum Dots ◽  
Fluorometric Determination

An ion-imprinted material embedded carbon quantum dots for selective fluorometric determination of lithium ion in water samples

2017 ◽  
Vol 184 (12) ◽  
pp. 4861-4868 ◽  
Author(s):  
Honghong Shao ◽  
Chunyan Li ◽  
Changchang Ma ◽  
Lin Sun ◽  
Rongru Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Water Samples ◽  
Lithium Ion ◽  
Carbon Quantum Dots ◽  
Fluorometric Determination ◽  
Ion Imprinted

Selective fluorometric determination of microcystin-LR using a segment template molecularly imprinted by polymer-capped carbon quantum dots

2021 ◽  
Vol 161 ◽  
pp. 105798
Author(s):  
Zhenke Qi ◽  
Ruiqin Lu ◽  
Shiyu Wang ◽  
Cheng Xiang ◽  
Chuangjie Xie ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Fluorometric Determination ◽  
Molecularly Imprinted

LUMINESCENT DETERMINATION OF SUGAR IN NATURAL HONEY

2020 ◽  
Vol 0 (4) ◽  
pp. 29-32
Author(s):  
B.M. GAREEV ◽  
◽  
A.M. ABDRAKHMANOV ◽  
G.L. SHARIPOV ◽  
◽  
...  
Keyword(s):  
Quantum Dots ◽  
Laboratory Test ◽  
Aqueous Solutions ◽  
Analytical Method ◽  
Sugar Content ◽  
Carbon Quantum Dots ◽  
Photoluminescence Intensity ◽  
Sucrose Content ◽  
Natural Honey

The photoluminescence of carbon quantum dots synthesized from natural honey and mixtures of honey and sugar has been studied. An increase in the sugar content leads to a decrease in the photoluminescence intensity without changing the shape of the luminescence spectrum of these quantum dots aqueous solutions, which is associated with a decrease in the yield of their synthesis in the sugar presence. The discovered effect can be used to detect sugar in honey. When examining five different market samples of flower honey using this method, two of them showed a significant decrease in the photoluminescence intensity. A laboratory test for compliance with GOST 19792-2017 Standard requirements established an excess of the sucrose content in these samples. Luminescent determination of sugar in honey does not require complicated equipment and can be used to develop a new analytical method for determining the sugar content in counterfeit natural honey.

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