Visual determination of azodicarbonamide in flour by label-free silver nanoparticle colorimetry

Chen, Fei; Liu, Lulu; Zhang, Wenrui; Wu, Wanfeng; Zhao, Xue-Jing; Zhang, Minwei; Guo, Fei; Qin, Yanan

doi:10.1016/j.foodchem.2020.127990

Cited by 16 publications

(6 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that the PA signal decreased with increasing reaction temperature from 20 to 50 °C. In addition, GSH is unstable when the temperature is higher than 50 °C . Therefore, 50 °C was chosen as the best reaction temperature for the ADA and GSH reaction.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Smartphone-Integrated Photoacoustic Analytical Device for Point-of-Care Testing of Food Contaminant Azodicarbonamide

et al. 2022

View full text Add to dashboard Cite

Azodicarbonamide (ADA) is widely used as a flour additive due to its oxidizing and bleaching properties, but it reacts with wet flour during heat processing and is easily decomposed into semicarbazide with genotoxicity and carcinogenicity. In order to improve the efficiency of food safety supervision and expand the scope of food safety control, it is of great significance to develop a facile method for point-of-care testing (POCT) of ADA. Herein, a field-portable and universal smartphone-based photoacoustic (PA) integration device is constructed for quantitative POCT of ADA in flour. The recognition probe Prussian blue with favorable stability is loaded on a flexible substrate for fabricating a portable test strip. In the presence of target ADA, the PA signal changes driven by a modulated 808 nm laser beam can be conveniently collected through the recording application (Audio Lab) of the smartphone. By combining the economic test strip and portable PA device with smartphone readout, it not only greatly simplifies the operation steps but also dramatically reduces the size and cost of the instrument. There is a favorable linear relationship between the PA signal and ADA concentration in the range of 10–200 μmol L–1 (R 2 = 0.9928), and a detection limit of 5 μmol L–1 obtained is much lower than the maximum allowable ADA level in the extract of flour (388 μmol L–1). The present miniature PA device with strong POCT ability holds enormous public health significance and economic value in the field of food safety, especially in resource-limited settings.

show abstract

Section: Resultsmentioning

confidence: 99%

“…In addition, GSH is unstable when the temperature is higher than 50 °C. 49 Therefore, 50 °C was chosen as the best reaction temperature for the ADA and GSH reaction. As shown in Figure S8B, the reaction between ADA and GSH was finished within 40 min.…”

Section: Characterization Of Pb Nps and Sensing Mechanismmentioning

confidence: 99%

Smartphone-Integrated Photoacoustic Analytical Device for Point-of-Care Testing of Food Contaminant Azodicarbonamide

et al. 2022

View full text Add to dashboard Cite

show abstract

“…As a sensitive element of optical sensors, silver nanoparticles of different morphology are widely used [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. It is known that aquasols of silver nanoparticles are intensely colored as a result of the localized surface plasmon resonance (LSPR) [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Solid-Phase Spectrometric Determination of Organic Thiols Using a Nanocomposite Based on Silver Triangular Nanoplates and Polyurethane Foam

Furletov,

Apyari,

Volkov

et al. 2023

Sensors

View full text Add to dashboard Cite

Adsorption of silver nanoparticles on polymers may affect the processes in which they participate, adjusting the analytical characteristics of methods for the quantitation of various substances. In the present study, a composite material based on silver triangular nanoplates (AgTNPs) and polyurethane foam was proposed for chemical analysis. The prospects of its application for the solid-phase/colorimetric determination of organic thiols were substantiated. It was found that aggregation of AgTNPs upon the action of thiols is manifested by a decrease in the AgTNPs’ localized surface plasmon resonance band and its significant broadening. Spectral changes accompanying the process can be registered using household color-recording devices and even visually. Four thiols differing in their functional groups were tested. It was found that their limits of detection increase in the series cysteamine < 2-mercaptoethanol < cysteine = 3-mercaptopropionic acid and come to 50, 160, 500, and 500 nM, respectively. The applicability of the developed approach was demonstrated during the analysis of pharmaceuticals and food products.

show abstract

“…Recently, Zhang and coworkers reported a colorimetric sensor based on Ag NPs for detecting azodicarbonamide with limit of 0.33 μM, the result can be estimated by the bare eye. [17] Sudheerkhan et al exploited citrate functionalized Ag NPs polyethylene glycol nanocomposite based gel sensor to detect Hg 2 + . [18] Shrivas exploited a paper colorimetric sensor based on SPR behavior of bimetallic Cu@Ag NPs, the phenthoate can be recognized by assisted a smartphone with limit of 15 μg L À 1 .…”

Section: Introductionmentioning

confidence: 99%

“…[20] Ag NPs as colorimetric probe provided visible, highly sensitive, simple, detection based on the surface plasmon resonance (SPR). [17] Notably, Ag NPs were expected to be a promising cost effective applicable probe which minimize the need for sophisticated and costly transduction instrumentation and techniques.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles for Colorimetric Detection and Discrimination of Mercury Ions in Lake Water

Zou

Pang

Zhang³

et al. 2021

ChemistrySelect

View full text Add to dashboard Cite

As the most toxic heavy metal, mercury (Hg) has been considered as the greatest environmental threat and it reach ubiquitous in industrial waste water and extended to environment. The detection of Hg 2 + in environmental water is a crucial work for both protecting the environment and human health. Colorimetric assay exhibits visual discriminating and simple readout. This work presents the selective sensing of metal ion (Hg 2 + ) by silver particles (Ag NPs), which were functionalized by galactosamine and synthesized via simple one pot method, with the average particle diameter of 18.75 � 0.49 nm. The limit of detection (LOD) was calculated as low as 7.92 nM. The colorimetric probe can also be performed in real water sample with good selectivity, and recovery was found to be 95-102 %, indicating can be used for on-line determination of Hg 2 + in the complex aqueous solutions. Additionally, the good catalytic performance of Ag NPs was demonstrated by hydrogenation of p-nitrophenol and potassium ferricyanide in water samples.

show abstract

Visual determination of azodicarbonamide in flour by label-free silver nanoparticle colorimetry

Cited by 16 publications

References 33 publications

Smartphone-Integrated Photoacoustic Analytical Device for Point-of-Care Testing of Food Contaminant Azodicarbonamide

Smartphone-Integrated Photoacoustic Analytical Device for Point-of-Care Testing of Food Contaminant Azodicarbonamide

Solid-Phase Spectrometric Determination of Organic Thiols Using a Nanocomposite Based on Silver Triangular Nanoplates and Polyurethane Foam

Silver Nanoparticles for Colorimetric Detection and Discrimination of Mercury Ions in Lake Water

Contact Info

Product

Resources

About