Simultaneous colorimetric detection of four drugs in their pharmaceutical formulations using unmodified gold nanoparticles as a probe

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 19924-19932 ◽  
Author(s):  
Karuna A. Rawat ◽  
Hirakendu Basu ◽  
Rakesh Kumar Singhal ◽  
Suresh Kumar Kailasa
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Pharmaceutical Formulations ◽  
Schematic Representation ◽  
Au Nps

Schematic representation for the aggregation of unmodified Au NPs induced by four drugs (venlafaxine, imipramine, amlodipine, and alfuzosin).

Colorimetric detection of Cs+ based on the nonmorphological transition mechanism of gold nanoparticles in the presence of Prussian blue

2020 ◽  
Vol 44 (6) ◽  
pp. 2241-2246
Author(s):  
Jiaoyan Qiu ◽  
Ling Fu ◽  
Hongsen Wang ◽  
Ruifen Zou ◽  
Yujie Zhang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Prussian Blue ◽  
Colorimetric Detection ◽  
Colorimetric Method ◽  
Au Nps ◽  
Transition Mechanism

A colorimetric method for the detection of Cs+ using Au NPs and Prussian blue based on a nonmorphological transition mechanism.

Colorimetric detection of quaternary ammonium surfactants using citrate-stabilized gold nanoparticles (Au NPs)

2014 ◽  
Vol 6 (7) ◽  
pp. 2031-2033 ◽  
Author(s):  
Li-Qing Zheng ◽  
Xiao-Dong Yu ◽  
Jing-Juan Xu ◽  
Hong-Yuan Chen
Keyword(s):  
Gold Nanoparticles ◽  
Quaternary Ammonium ◽  
Low Cost ◽  
Colorimetric Detection ◽  
Hydrophobic Effect ◽  
Colorimetric Method ◽  
Au Nps ◽  
Quaternary Ammonium Surfactants

Based on the hydrophobic effect inducing the aggregation of Au NPs, a rapid and low-cost colorimetric method for detection of quaternary ammonium surfactants using citrate-stabilized AuNPs was developed.

Dicoumarol assisted synthesis of water dispersible gold nanoparticles for colorimetric sensing of cysteine and lysozyme in biofluids

RSC Advances ◽  
2015 ◽  
Vol 5 (49) ◽  
pp. 39182-39191 ◽  
Author(s):  
Betha Saineelima B. Kasibabu ◽  
Jigna R. Bhamore ◽  
Stephanie L. D'souza ◽  
Suresh Kumar Kailasa
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Sensing ◽  
Schematic Representation ◽  
Au Nps ◽  
Water Dispersible

A schematic representation of the mechanism for the colorimetric sensing of Cys and Lys using DIC–Au NPs as a probe.

Malonamide dithiocarbamate functionalized gold nanoparticles for colorimetric sensing of Cu2+ and Hg2+ ions

RSC Advances ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 4245-4255 ◽  
Author(s):  
Vaibhavkumar N. Mehta ◽  
Suresh Kumar Kailasa
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Detection ◽  
Colorimetric Sensing ◽  
Au Nps ◽  
Colorimetric Probe ◽  
Functionalized Gold Nanoparticles

In this study, a colorimetric probe was developed based on malonamide dithiocarbamate functionalized gold nanoparticles (MA–DTC–Au NPs) for the simultaneous colorimetric detection of Cu2+ and Hg2+ ions.

A molecular assembly of piperidine carboxylic acid dithiocarbamate on gold nanoparticles for the selective and sensitive detection of Al3+ion in water samples

RSC Advances ◽  
2015 ◽  
Vol 5 (42) ◽  
pp. 33468-33477 ◽  
Author(s):  
Vaibhavkumar N. Mehta ◽  
Rakesh Kumar Singhal ◽  
Suresh Kumar Kailasa
Keyword(s):  
Gold Nanoparticles ◽  
Carboxylic Acid ◽  
Water Samples ◽  
Molecular Assembly ◽  
Sensitive Detection ◽  
Colorimetric Sensing ◽  
Schematic Representation ◽  
Au Nps

Schematic representation for the colorimetric sensing of Al3+ion using PCA-DTC-Au NPs as a probe.

scholarly journals Colorimetric sensing of cephradine through polypropylene glycol functionalized gold nanoparticles

2021 ◽  
Vol 8 (5) ◽  
pp. 210185
Author(s):  
Daim Asif Raja ◽  
Fazeelah Munir ◽  
Muhammad Raza Shah ◽  
Muhammad Iqbal Bhanger ◽  
Muhammad Imran Malik
Keyword(s):  
Gold Nanoparticles ◽  
Rapid Determination ◽  
Colorimetric Detection ◽  
Pharmaceutical Formulations ◽  
Metal Nanoparticle ◽  
Polypropylene Glycol ◽  
Colorimetric Sensing ◽  
Two Phase ◽  
One Pot ◽  
Resonance Band

The development of metal nanoparticle-based facile colorimetric assays for drugs and insecticides is an emerging area of current scientific research. In the present work, polypropylene glycol was used for stabilization of gold nanoparticles (AuNPs) in a simple one-pot two-phase process and subsequently employed it for the specific detection of cephradine (CPH). The characterization of the prepared PPG-AuNPs was conducted through various analytical techniques such as UV-visible spectrophotometry, Fourier transform infrared spectroscopy, atomic force microscopy (AFM), zeta potential and zetasizer techniques. As the major target of the study, the stabilized PPG-AuNPs were employed for colorimetric detection of CPH and other drugs. Typical wine-red colour of PPG-AuNPs disappeared immediately and surface plasmon resonance band quenched by addition of CPH in the presence of several other interferents (drugs and salts) and in real samples. PPG-AuNPs permitted efficient, selective, reliable and rapid determination in a concentration range of 0.01–120 mM with a detection limit (LoD) of 11.0 mM. The developed sensor has the potential to be used for fast scanning of pharmaceutical formulations for quantification of CPH at production facilities.

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 Study of the Stability of Functionalized Gold Nanoparticles for the Colorimetric Detection of Dipeptidyl Peptidase IV

2018 ◽  
Vol 8 (12) ◽  
pp. 2589 ◽  
Author(s):  
Hasan Aldewachi ◽  
Nicola Woodroofe ◽  
Philip Gardiner
Keyword(s):  
Gold Nanoparticles ◽  
Ionic Strength ◽  
Biomedical Applications ◽  
Colorimetric Detection ◽  
Dipeptidyl Peptidase ◽  
High Ionic Strength ◽  
Dipeptidyl Peptidase Iv ◽  
Au Nps ◽  
Dpp Iv ◽  
The Stability

In this report, we investigated three stabilization strategies of gold nanoparticles and their practical application for the visual detection of dipeptidyl peptidase IV (DPP-IV). Citrate-capped gold nanoparticles (Au NPs) are generally unstable in high-ionic-strength samples. Au NPs are easily tagged with various proteins and biomolecules rich in amino acids, leading to important biomedical applications including targeted drug delivery, cellular imaging, and biosensing. The investigated assays were based on different modes of stabilization, such as the incorporation of polyethylene glycol (PEG) groups, stabilizer peptide, and bifunctionalization. Although all approaches provided highly stable Au NP platforms demonstrated by zeta potential measurements and resistance to aggregation in a high-ionic-strength saline solution, we found that the Au NPs modified with a separate stabilizer ligand provided the highest stability and was the only platform that demonstrated sensitivity to the addition of DPP-IV, whilst PEGylated and peptide-stabilized Au NPs showed no significant response.

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