Novel, highly selective detection of Cr(III) in aqueous solution based on a gold nanoparticles colorimetric assay and its application for determining Cr(VI)

2012 ◽  
Vol 731 ◽  
pp. 75-81 ◽  
Author(s):  
Liang Zhao ◽  
Yin Jin ◽  
Zhangwei Yan ◽  
Yuanyuan Liu ◽  
Hongjun Zhu
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Colorimetric Assay ◽  
Selective Detection

Colorimetric Detection of Trace Arsenic(III) in Aqueous Solution Using Arsenic Aptamer and Gold Nanoparticles

2014 ◽  
Vol 67 (5) ◽  
pp. 813 ◽  
Author(s):  
Minglei Yu
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Detection Limit ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Colour Change ◽  
Colorimetric Sensing ◽  
Detection Range ◽  
Colorimetric Indicator ◽  
Blue Solution

In this study, trace arsenic(iii) (AsIII) in aqueous solution was detected by applying a classical aptamer-based gold nanoparticles colorimetric sensing strategy. An arsenic aptamer was used as a sensing probe and gold nanoparticles as a colorimetric indicator. In the absence of AsIII, the gold nanoparticles were stabilised by the arsenic aptamer and remained dispersed at high NaCl concentrations, displaying a red solution. Contrarily, in the presence of AsIII, the gold nanoparticles were prone to aggregation, owing to the formation of aptamer–AsIII complex between the arsenic aptamer and AsIII, and thus exhibited a blue solution. By monitoring the colour change, a simple and fast colorimetric assay for AsIII was established with a detection range of 1.26–200 ppb and a detection limit of 1.26 ppb. Because this colorimetric assay only involves common reagents and can be assessed visually, it holds great potential for arsenic(iii) monitoring in environment-related and other applications.

Gold nanoparticle-based fluorescent “turn-on” sensing system for the selective detection of mercury ions in aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95268-95272 ◽  
Author(s):  
Sohee Choi ◽  
Youngmi Kim
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Sensitive Detection ◽  
Selective Detection ◽  
Mercury Ions ◽  
Buffer Solution ◽  
Aqueous Buffer ◽  
Turn On ◽  
Sensing System

A simple and straightforward fluorometric assay using dye-adsorbed gold nanoparticles (AuNPs) was used in the highly selective and sensitive detection of mercury ions in aqueous buffer solution.

Selective colorimetric detection of Cr(iii) and Cr(vi) using gallic acid capped gold nanoparticles

2016 ◽  
Vol 45 (20) ◽  
pp. 8347-8354 ◽  
Author(s):  
Chen Dong ◽  
Genhua Wu ◽  
Zhuqing Wang ◽  
Wenzhi Ren ◽  
Yujie Zhang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gallic Acid ◽  
Color Change ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Selective Detection

A colorimetric assay is proposed for the selective detection of Cr(iii) and Cr(vi) via the aggregation-induced color change of gallic acid capped gold nanoparticles (GA-AuNPs).

Selective sensing of sulfate anions in water with cyclopeptide-decorated gold nanoparticles

2020 ◽  
Vol 56 (72) ◽  
pp. 10457-10460 ◽  
Author(s):  
Julia Bartl ◽  
Lena Reinke ◽  
Marcus Koch ◽  
Stefan Kubik
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Selective Detection ◽  
Sulfate Ions ◽  
Naked Eye

Gold nanoparticles containing surface-bound cyclopeptides precipitate from an aqueous solution in the presence of sulfate ions, thus allowing the selective detection of this anion with the naked eye.

scholarly journals Selective and colorimetric detection of Ba2+ ions in aqueous solutions using 11-mercaptoundecylphosphonic acid functionalized gold nanoparticles

RSC Advances ◽  
2017 ◽  
Vol 7 (50) ◽  
pp. 31611-31618 ◽  
Author(s):  
Blanca A. García Grajeda ◽  
Samuel G. Soto Acosta ◽  
Sergio A. Aguila ◽  
Héctor Peinado Guevara ◽  
Marta E. Díaz-García ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Aqueous Solutions ◽  
Colorimetric Detection ◽  
Colorimetric Method ◽  
Selective Detection ◽  
Functionalized Gold Nanoparticles

In this paper we describe a simple colorimetric method for the sensitive and selective detection of Ba2+ ions, using 11-mercaptoundecylphosphonic acid functionalized gold nanoparticles (AuNPs–MPA) in aqueous solution.

Selective detection of nanomolar Cr(vi) in aqueous solution based on 1,4-dithiothreitol functionalized gold nanoparticles

2011 ◽  
Vol 3 (2) ◽  
pp. 343-347 ◽  
Author(s):  
Feng Tan ◽  
Xue Liu ◽  
Xie Quan ◽  
Jingwen Chen ◽  
Xiaona Li ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Selective Detection ◽  
Functionalized Gold Nanoparticles

An Effort to Making a Colorimitric Nano-Biosensor for Vibrio cholera Detection

2020 ◽  
Vol 16 (5) ◽  
pp. 793-804
Author(s):  
Naimeh Mahheidari ◽  
Jamal Rashidiani ◽  
Hamid Kooshki ◽  
Khadijeh Eskandari
Keyword(s):  
Gold Nanoparticles ◽  
Colorimetric Assay ◽  
Au Nanoparticle ◽  
Bacteria Detection ◽  
Great Promise ◽  
Bacterial Cells ◽  
Vibrio Cholera ◽  
Minimum Concentration ◽  
Vis Spectroscopy ◽  
Fast Procedure

Background: Today, nanoparticles hold great promise in biomedical researches and applications including bacteria detection. The rapid and sensitive outcomes of bacteria detection strategies using nanoparticle conjugates become determinative, especially in bacterial outbreaks. In the current research, we focused on detecting V. cholera bacteria and its toxin using a thiocyanate/Au nanoparticle. Thiocyanate adsorbed strongly on the surface of gold nanoparticles and changed the surface by enhancing surface plasmon resonance of gold nanoparticles. Objective: This method is tried to introduce a simple and fast procedure to assay vibrio cholera. So, it is observed by the naked eyes as well. Methods: We used two antibodies (Ab) for V. cholera detection: a) a primary antibody conjugated to magnetic nanoparticles (MNPs) for trapping V. cholera bacterial cells, and b) a secondary Abconjugated thiocyanate-GNPs as a colorimetric detector. Then, an immuno-magnetic separation system connected to a colorimetric assay was designed based on the GNPs. The results were measured by ultraviolet-visible (UV-Vis) spectroscopy. Results: The results showed that gold nanoparticles are an appropriate optical assay for detecting biological samples in a minimum concentration and also it can be easily seen by the naked eyes. The linear range of this biosensor is 3.2×104 to 28×104 cells per ml. Conclusion: In this research, a colorimetric immune assay based on gold nanoparticles was designed to improve the sensitivity of V. cholera detection. Also, this method can be used for the detection of other biological agents.

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