Visual detection of ascorbic acid via alkyne–azide click reaction using gold nanoparticles as a colorimetric probe

The Analyst ◽  
2010 ◽  
Vol 135 (7) ◽  
pp. 1579 ◽  
Author(s):  
Yuanfu Zhang ◽  
Baoxin Li ◽  
Chunli Xu
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Visual Detection ◽  
Click Reaction ◽  
Colorimetric Probe

Visual detection of melamine in raw milk using gold nanoparticles as colorimetric probe

2010 ◽  
Vol 122 (3) ◽  
pp. 895-900 ◽  
Author(s):  
Li Li ◽  
Baoxin Li ◽  
Di Cheng ◽  
Lihui Mao
Keyword(s):  
Gold Nanoparticles ◽  
Visual Detection ◽  
Raw Milk ◽  
Colorimetric Probe

Gold nanoparticles as a colorimetric probe for the determination of N-acetyl-l-cysteine in biological samples and pharmaceutical formulations

2015 ◽  
Vol 7 (4) ◽  
pp. 1478-1483 ◽  
Author(s):  
Saadat Rastegarzadeh ◽  
Fatemeh Hashemi
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Biological Samples ◽  
Pharmaceutical Formulations ◽  
Reducing Agent ◽  
Spectrophotometric Detection ◽  
Colorimetric Probe

In this study, gold nanoparticles (AuNPs) have been synthesised using ascorbic acid as a reducing agent and employed in the design of an in situ colorimetric probe for the spectrophotometric detection of N-acetyl-l-cysteine (NAC).

A colorimetric probe for ascorbic acid based on copper-gold nanoparticles in electrospun nylon

2013 ◽  
Vol 181 (3-4) ◽  
pp. 395-401 ◽  
Author(s):  
Boitumelo Mudabuka ◽  
Dezzline Ondigo ◽  
Slyvestre Degni ◽  
Sibulelo Vilakazi ◽  
Nelson Torto
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Colorimetric Probe ◽  
Copper Gold

Ascorbic acid functionalized gold nanoparticles as a probe for colorimetric and visual read-out determination of dichlorvos in environmental samples

2014 ◽  
Vol 6 (22) ◽  
pp. 9007-9014 ◽  
Author(s):  
Stephanie L. D'souza ◽  
Ranjan Kumar Pati ◽  
Suresh Kumar Kailasa
Keyword(s):  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Environmental Samples ◽  
Schematic Representation ◽  
Au Nps ◽  
Colorimetric Probe ◽  
Analytical Process ◽  
Functionalized Gold Nanoparticles

Schematic representation of the analytical process for detecting dichlorvos using AA–Au NPs as a colorimetric probe.

scholarly journals Selective colorimetric NO(g) detection based on the use of modified gold nanoparticles using click chemistry

2015 ◽  
Vol 51 (15) ◽  
pp. 3077-3079 ◽  
Author(s):  
Almudena Martí ◽  
Ana M. Costero ◽  
Pablo Gaviña ◽  
Margarita Parra
Keyword(s):  
Gold Nanoparticles ◽  
Click Chemistry ◽  
Click Reaction ◽  
Colorimetric Probe ◽  
Functionalized Gold Nanoparticles

A new colorimetric probe for the detection of NO(g) based on the use of functionalized gold nanoparticles is described. The sensing protocol is based on a click reaction catalized by Cu(i) which is generated in situ from the reduction of Cu(ii) by NO(g).

scholarly journals Highly sensitive colorimetric sensing of copper(ii) ions based on “CLICK-17” DNAzyme-catalyzed azide modified gold nanoparticles and alkyne capped dsDNA cycloaddition

RSC Advances ◽  
2021 ◽  
Vol 11 (39) ◽  
pp. 24196-24205
Author(s):  
Weicong Yan ◽  
Zhensheng Zhong ◽  
Jie Ma ◽  
Thitima Rujiralai
Keyword(s):  
Gold Nanoparticles ◽  
Visual Detection ◽  
Click Reaction ◽  
Colorimetric Sensing ◽  
Highly Sensitive

We report selective and visual detection of Cu2+ based on aggregation of azide modified gold nanoparticles induced by CLICK-17 DNAzyme and Cu2+ or Cu+ catalyzed click reaction between azide-AuNPs and alkyne-dsDNA.

Molecularly Imprinted Sensor for Ascorbic Acid Based on Gold Nanoparticles and Multiwalled Carbon Nanotubes

2020 ◽  
Vol 16 (7) ◽  
pp. 905-913
Author(s):  
Youyuan Peng ◽  
Qingshan Miao
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Ascorbic Acid ◽  
Multiwalled Carbon Nanotubes ◽  
Ph Value ◽  
Biological Fluids ◽  
Water Soluble ◽  
Multiwalled Carbon ◽  
Experimental Conditions ◽  
Molecularly Imprinted

Background: L-Ascorbic acid (AA) is a kind of water soluble vitamin, which is mainly present in fruits, vegetables and biological fluids. As a low cost antioxidant and effective scavenger of free radicals, AA may help to prevent diseases such as cancer and Parkinson’s disease. Owing to its role in the biological metabolism, AA has also been utilized for the therapy of mental illness, common cold and for improving the immunity. Therefore, it is very necessary and urgent to develop a simple, rapid and selective strategy for the detection of AA in various samples. Methods: The molecularly imprinted poly(o-phenylenediamine) (PoPD) film was prepared for the analysis of L-ascorbic acid (AA) on gold nanoparticles (AuNPs) - multiwalled carbon nanotubes (MWCNTs) modified glass carbon electrode (GCE) by electropolymerization of o-phenylenediamine (oPD) and AA. Experimental parameters including pH value of running buffer and scan rates were optimized. Scanning electron microscope (SEM), fourier-transform infrared (FTIR) spectra, cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were utilized for the characterization of the imprinted polymer film. Results: Under the selected experimental conditions, the DPV peak currents of AA exhibit two distinct linear responses ranging from 0.01 to 2 μmol L-1 and 2 to 100 μmol L-1 towards the concentrations of AA, and the detection limit was 2 nmol L-1 (S/N=3). Conclusion: The proposed electrochemical sensor possesses excellent selectivity for AA, along with good reproducibility and stability. The results obtained from the analysis of AA in real samples demonstrated the applicability of the proposed sensor to practical analysis.

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