scholarly journals Colorimetric determination of ascorbic acid based on carbon quantum dots as peroxidase mimetic enzyme

RSC Advances ◽  
2020 ◽  
Vol 10 (25) ◽  
pp. 14953-14957 ◽  
Author(s):  
Xin Shu ◽  
Yuwai Chang ◽  
Huizhong Wen ◽  
Xiaotiao Yao ◽  
Yilin Wang
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Carbon Quantum Dots ◽  
Absorption Peak ◽  
Strong Absorption ◽  
Colorimetric Determination ◽  
Mimetic Enzyme ◽  
Peroxidase Mimetic ◽  
Strong Absorption Peak

Carbon quantum dots (CQDs) were synthesized from litchi peel, exhibiting a peroxidase-like activity and enabling the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) in association with H2O2 to generate blue oxidized TMB (ox-TMB) with a strong absorption peak at 652 nm.

A nitrogen doped carbon quantum dot-enhanced chemiluminescence method for the determination of Mn2+

2018 ◽  
Vol 10 (5) ◽  
pp. 541-547 ◽  
Author(s):  
Junmei Zhang ◽  
Xiaoxia Chen ◽  
Yue Li ◽  
Suqin Han ◽  
Yao Du ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Ultrasonic Method ◽  
Carbon Quantum Dots ◽  
Chemiluminescence Method ◽  
Nitrogen Doped ◽  
Carbon Quantum Dot ◽  
Enhanced Chemiluminescence ◽  
Nitrogen Doped Carbon

Nitrogen doped carbon quantum dots (NCQDs) were synthesized via an ultrasonic method with ascorbic acid as the carbon source and ammonia as the nitrogen source.

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.

Colorimetric determination of D-penicillamine based on the peroxidase mimetic activity of hierarchical hollow MoS2 nanotubes

2021 ◽  
Vol 332 ◽  
pp. 129459
Author(s):  
Mohammad Nazifi ◽  
Amir M. Ramezani ◽  
Ghodratollah Absalan ◽  
Raheleh Ahmadi
Keyword(s):  
Colorimetric Determination ◽  
Peroxidase Mimetic ◽  
Mos2 Nanotubes
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