Colorimetric method for determination of bisphenol A based on aptamer-mediated aggregation of positively charged gold nanoparticles

Xu, Jingyue; Li, Ying; Bie, Jiaxin; Jiang, Wei; Guo, Jiajia; Luo, Yanru; Shen, Furao; Sun, Chia‐Chung

doi:10.1007/s00604-015-1547-z

Cited by 53 publications

(17 citation statements)

References 35 publications

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“…More recently, other aptamer functionalized Au NPs have been demonstrated for the detection of various analytes, including abrin, 17β-estradiol and bisphenol A. [94][95][96] During the target recognition process, aptamers usually undergo a conformation change, which alters the binding affinity between DNA and Au NPs. Liu et al developed a non-DNA attached approach for colorimetric thallium ion (Ti + ) sensing with a LOD of 59 µM using Ti + -selective aptamers and Au NPs.…”

Section: Colorimetric Assaysmentioning

confidence: 99%

Gold nanoparticles as sensitive optical probes

Yuan

Chang

et al. 2016

Analyst

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Gold nanoparticles (Au NPs) have become one of the most popular materials for sensing of analytes of interest in the last decade, mainly because of their ease in preparation and conjugation, stability, biocompatibility, and size-dependent optical properties. We have witnessed many sensitive and selective Au NP based optical systems for the quantitation of metal ions, anions, proteins, and DNA, based on analyte induced changes in their absorption, fluorescence, and scattering. In this tutorial review, we briefly discuss wet chemical approaches for the preparation of Au NPs. Sensing mechanisms and strategies of Au NP based optical systems are provided to show basic concepts in designing sensitive and selective sensing systems. Strategies for signal amplification applied in Au NP based systems are emphasized for the analysis of trace amounts of analytes in real samples. Many excellent Au NP based optical sensing systems are discussed to highlight their practicality for the analysis of complicated biological and environmental samples. The tutorial review ends with the discussion of the challenges and future trends of Au NP based optical sensing systems.

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Section: Colorimetric Assaysmentioning

confidence: 99%

Gold nanoparticles as sensitive optical probes

Yuan

Chang

et al. 2016

Analyst

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“…TEM and DLS characterization were used to further confirm the principle of this aptamer-AuNPs-based colorimetric assay [32]. TEM is useful to observe the aggregation behavior of AuNPs.…”

Section: Characterization Of the Interaction Between P4 Aptamer And Amentioning

confidence: 99%

A label-free colorimetric progesterone aptasensor based on the aggregation of gold nanoparticles

Zhang

Xia

et al. 2016

Microchim Acta

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The authors describe an aptasensor for the detection of the gonadal hormone progesterone (P4) in aqueous solution. Gold nanoparticles (AuNPs) were coated with a P4-specific aptamer, and such particles do not aggregate in presence of NaCl due to the presence of the aptamer coating. If, however, progesterone is added, it will bind to the aptamer and release it from the surface. The uncoated AuNPs, on addition of NaCl, will aggregate and a color change from red (520 nm) to blue (650 nm) can be visually detected or photometrically quantified. The ratio of the absorbances at 650 and 520 nm is linearly related to the P4 concentration in the range from 2.6 to 800 nM. The complete detection range extends from 2.6 to 1400 nM, and the detection limit is 2.6 nM. Water containing various potential interferents, as well as tap water and urine, were spiked with P4 and the recoveries of P4 are in the range of 89.7-117.5%, 84.4-115.0% and 94.7-118.8%, respectively. This assay has a large potential with respect to the visual and instrumental determination of P4 in aquatic environment and urine.

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“…However, the separation methods, although very relevant, usually present high cost of acquisition and maintenance when compared with spectrometric methods. Considering the UV-Vis spectrophotometry methods, all the searched articles 11,14,15 report the use of the visible region, displacing the wavelength of maximum absorption of BPA through different mechanisms. The paper by Xu et al 14 uses the interaction of BPA with gold nanoparticles coated with cysteamine, allowing the determination of BPA at 680 nm.…”

Section: A Simple and Effective Liquid-liquid-liquid Microextraction mentioning

confidence: 99%

“…Considering the UV-Vis spectrophotometry methods, all the searched articles 11,14,15 report the use of the visible region, displacing the wavelength of maximum absorption of BPA through different mechanisms. The paper by Xu et al 14 uses the interaction of BPA with gold nanoparticles coated with cysteamine, allowing the determination of BPA at 680 nm. Yıldırım et al 15 performed the preconcentration of BPA based on its complexation with colorimetric reagent (3-methylamino-7-dimethylaminophenothiazin-5-ium chloride in the presence of cetyltrimethylammonium bromide), by cloud point extraction, enabling its measurement at 643 nm.…”

Section: A Simple and Effective Liquid-liquid-liquid Microextraction mentioning

confidence: 99%

A Simple and Effective Liquid-Liquid-Liquid Microextraction Method with Ultraviolet Spectrophotometric Detection for the Determination of Bisphenol A in Aqueous Matrices and Plastic Leachates

Huelsmann

Martendal

2020

J. Braz. Chem. Soc.

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This study shows the development and application of an analytical method for the determination of bisphenol A (BPA) in aqueous samples such as tap, river and mineral water and plastic leachates, based on an extensive literature search to understand the gaps for the determination of BPA in aqueous samples. We found that most of the methods in the literature employ some chromatographic strategy, and, to a much lesser extent, non-chromatographic instrumentation. In this scenario, we show an ultraviolet spectrophotometric-based method that can be used for routine analysis. Sample preparation was conducted by means of solvent extraction followed by back-extraction into an alkaline aqueous solution (liquid-liquid-liquid microextraction) and the detection was performed by UV spectrophotometry at 294 nm. Optimization of variables affecting both extraction and back-extraction was conducted, and the optimal extraction conditions were obtained: 85 mL aqueous sample buffered at pH 10, ionic strength adjusted with NaCl to a 2 mol L −1 final concentration, extraction with 6 mL of ethyl ether for 10 min and back-extraction into 0.5 mL of 2 mol L −1 aqueous NaOH. The following quality parameters were obtained: determination coefficient (R 2) > 0.999, intra and inter-day repeatability better than 7.8% and 300 enhancement factor. The method was applied in different aqueous samples with excellent recovery and precision results, and no BPA was detected in natural water, even with the excellent limit of detection (3.5 μg L −1) and limit of quantification obtained. Limitations of this method involve analysis of samples with humic acid concentrations higher than 2 mg L −1 or high concentration of phenols and/or phthalate esters.

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Colorimetric method for determination of bisphenol A based on aptamer-mediated aggregation of positively charged gold nanoparticles

Cited by 53 publications

References 35 publications

Gold nanoparticles as sensitive optical probes

Gold nanoparticles as sensitive optical probes

A label-free colorimetric progesterone aptasensor based on the aggregation of gold nanoparticles

A Simple and Effective Liquid-Liquid-Liquid Microextraction Method with Ultraviolet Spectrophotometric Detection for the Determination of Bisphenol A in Aqueous Matrices and Plastic Leachates

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