Determination of antioxidant additives in foodstuffs by direct measurement of gold nanoparticle formation using resonance light scattering detection

Andreu-Navarro, A.; Fernández-Romero, J.M.; Gómez‐Hens, A.

doi:10.1016/j.aca.2011.03.047

Cited by 50 publications

(9 citation statements)

References 19 publications

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“…In an attempt at antioxidant-surfactant combination by making use of light scattering rather than absorbance measurements, the capability of antioxidant compounds to enable Au(III)-AuNPs reduction was kinetically studied (in the presence of CTAB) with the stopped-flow mixing technique and a resonance light scattering (RLS) detection system, where the initial reaction rate for the formation of AuNPs was measured (22). When the initial rate of the system (as RLS signal per unit time) in the presence and absence of antioxidant was recorded against antioxidant concentration, a linear calibration curve was empirically obtained with relatively low limit of detection (LOD) values around 10 nmol L -1 for some food antioxidants.…”

Section: Nanoparticle-based Methods Of Total Antioxidant Capacity Meamentioning

confidence: 99%

Nanotechnological Methods of Antioxidant Characterization

Apak

Çapanoğlu

Arda

2015

ACS Symposium Series

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tr. Fax: +90 212 4737180.Nanoparticle (NP)-based analytical methods have displayed a rapid development at the interface of analytical chemistry, food chemistry, biochemistry, and nanotechnology, together with their related industries. For the design of novel antioxidant assays, NPs can be used as colorimetric or electrochemical probes, components in chemical and biological detectors, and radical generation systems. Most applications of NPs used as probes for food chemicals and biochemicals are associated with the use of Au, Ag, magnetite (Fe 3 O 4 ) or titania (TiO 2 ) nanoparticles and quantum dots. Chemical reduction-based nanotechnological colorimetric assays of antioxidant capacity make use of the formation or enlargement of noble metal nanoparticles (AuNPs, AgNPs, etc.) upon reaction of Au(III) or Ag(I) salts with antioxidant compounds acting as chemical reductants.In this chapter, NP-based methods for the measurement of total antioxidant capacity involving chemical reduction together with the methods for the detection of reactive oxygen and nitrogen species (ROS/RNS) and determination of their scavenging activity have been reviewed. Within this scope, spectroscopic methods associated with electron transfer and noble metal nanoparticles as well as electroanalytical biosensor-originated antioxidant activity/capacity methods

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Section: Nanoparticle-based Methods Of Total Antioxidant Capacity Meamentioning

confidence: 99%

Nanotechnological Methods of Antioxidant Characterization

Apak

Çapanoğlu

Arda

2015

ACS Symposium Series

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“…Because Au nanoparticles (AuNPs) have many sensing applications [22][23][24], they have been used to evaluate antioxidant activity in foods, plants and beverages [5,18,[25][26][27][28][29][30][31][32][33][34]. Antioxidants present in plants and fruits can act as reductants and are able to reduce Au 3+ ions into gold nanoparticles (AuNPs).…”

Section: Introductionmentioning

confidence: 99%

Determination of antioxidant activities in fruit juices based on rapid colorimetric measurement and characterisation of gold nanoparticles

Chou

Yin

et al. 2015

International Journal of Environmental Analytical Chemistry

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“…Herein, we in-situ synthesized gold nanoparticles on filter paper. Though there is a similar approach to doing this, the reported works either quantified a total reducing power of a sample like tea and juice (dissolving a variety of antioxidants [20,21]) or using an enzyme to specify an analyte (i.e., glucose oxidase [22]).…”

Section: Introductionmentioning

confidence: 99%

Rationalization of In-Situ Synthesized Plasmonic Paper for Colorimetric Detection of Glucose in Ocular Fluids

2020

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Tear glucose is an intriguing biofluid that includes potential biomarkers. While many sensors have emerged nowadays, there is still demand for advanced sensors with nonenzymatic, simple, cost-effective sensing mechanism. Herein, we present a paper-based colorimetric assay by utilizing a gold nanoparticle formation. Experimental characterization substantiated a mechanism in this in situ reduction. Scanning electron microscopy, UV-visible spectrometry, etc. were involved in the scrutiny. As a result, we reached for the rationale whereas the particle formation can be utilized for a glucose sensing using tears. This paper-based detection was insusceptible to physiological tear matrix, i.e., chloride ion effect, false-positive error and synergistic effect by antioxidants. In addition, we evaluated its analytical performance in an artificial tear assay. Of the obtained a linear regressions, the concentration range corresponded to the physiological or pathologic reference range. In addition, within the low-concentration range, a high correlation was resulted 0.965. Furthermore, we investigated statistical validation by employing the Bland–Altman plot. In the end sections of this paper, we denoted its ready-to-use merits by simplicity—as well as the further application of our plasmonic paper.

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Determination of antioxidant additives in foodstuffs by direct measurement of gold nanoparticle formation using resonance light scattering detection

Cited by 50 publications

References 19 publications

Nanotechnological Methods of Antioxidant Characterization

Nanotechnological Methods of Antioxidant Characterization

Determination of antioxidant activities in fruit juices based on rapid colorimetric measurement and characterisation of gold nanoparticles

Rationalization of In-Situ Synthesized Plasmonic Paper for Colorimetric Detection of Glucose in Ocular Fluids

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