Simultaneous stripping determination of cadmium and lead ions based on the N-doped carbon quantum dots-graphene oxide hybrid

2018 ◽  
Vol 255 ◽  
pp. 1762-1770 ◽  
Author(s):  
Libo Li ◽  
Dong Liu ◽  
Aiping Shi ◽  
Tianyan You
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Carbon Quantum Dots ◽  
Lead Ions ◽  
Cadmium And Lead

Dithizone-modified graphene oxide nano-sheet as a sorbent for pre-concentration and determination of cadmium and lead ions in food

2015 ◽  
Vol 32 (11) ◽  
pp. 1851-1857 ◽  
Author(s):  
Hamid Reza Moghadam Zadeh ◽  
Parvaneh Ahmadvand ◽  
Ali Behbahani ◽  
Mostafa M. Amini ◽  
Omid Sayar
Keyword(s):  
Graphene Oxide ◽  
Lead Ions ◽  
Modified Graphene Oxide ◽  
Cadmium And Lead ◽  
Modified Graphene

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.

Determination of Pyrogallic Acid in Amino-functional Carbon Quantum Dots Fluorescence Quenching

2017 ◽  
Vol 38 (1) ◽  
pp. 117-123
Author(s):  
李满秀 LI Man-xiu ◽  
李永霞 LI Yong-xia ◽  
张媛 ZHANG Yuan ◽  
贺晨芳 HE Chen-fang
Keyword(s):  
Quantum Dots ◽  
Fluorescence Quenching ◽  
Carbon Quantum Dots ◽  
Pyrogallic Acid
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