A colorimetric probe for ascorbic acid based on copper-gold nanoparticles in electrospun nylon

Mudabuka, Boitumelo; Ondigo, Dezzline A.; Degni, Slyvestre; Vilakazi, Sibulelo; Torto, Nelson

doi:10.1007/s00604-013-1114-4

Cited by 25 publications

(14 citation statements)

References 31 publications

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“…The second approach is much more promising regarding this task, however it requires a quite complicated synthetic procedure. An alternative approach has been developed by Torto and co-workers [25][26][27]. It is based on application of AuNPs-polymer fiber nanocomposites synthesized by the electrospinning technique as colorimetric probes that change their color due to aggregation of AuNPs on surface of the fibers in the presence of analytes.…”

Section: Introductionmentioning

confidence: 99%

Towards the development of solid-state platform optical sensors: aggregation of gold nanoparticles on polyurethane foam

Apyari

Arkhipova

Gorbunova

et al. 2016

Talanta

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Section: Introductionmentioning

confidence: 99%

Towards the development of solid-state platform optical sensors: aggregation of gold nanoparticles on polyurethane foam

Apyari

Arkhipova

Gorbunova

et al. 2016

Talanta

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“…Chigome and Torto reported the opportunity to incorporate gold nanoparticles in electrospun nanofibers and their possible sensing mechanism relying on the variable proximity phenomena of the gold nanoparticles in a review on electrospun nanofibers in analytical chemistry . Based on this mechanism, Mudabuka et al designed a colorimetric probe for ascorbic acid . Ascorbic acid is an essential vitamin in various biochemical processes and is found in multiple sources ranging from biological fluids to pharmaceuticals.…”

Section: Colorimetric Sensors Based On Doped Nanofibersmentioning

confidence: 99%

“…This phenomenon results in a bathochromic shift of the surface plasmon resonance band, represented by the blue color. Since no sample preparation is required for the detection of ascorbic acid with colorimetric nanofibers, the time and cost of analysis can be significantly reduced compared to other analytical methods such as HPLC, spectrophotometry or methods based on enzymes, which proves the viability of colorimetric nanofibrous sensors . Gold nanoparticles were also applied in another polyamide 6 nanofibrous matrix to detect dopamine as reported by Krause et al As dopamine concentrations are linked to various neurological diseases, such as Parkinson and Schizophrenia, colorimetric detection of dopamine could be of great value to personal medical care.…”

Section: Colorimetric Sensors Based On Doped Nanofibersmentioning

confidence: 99%

Colorimetric Nanofibers as Optical Sensors

Schoolaert

Hoogenboom

Clerck

2017

Adv Funct Materials

118

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Sensors play a major role in many applications today, ranging from biomedicine to safety equipment, where they detect and warn us about changes in the environment. Nanofibers, characterized by high porosity, flexibility, and a large specific surface area, are the ideal material for ultrasensitive, fastresponding, and user-friendly sensor design. Indeed, a large specific surface area increases the sensitivity and response time of the sensor as the contact area with the analyte is enlarged. Thanks to the flexibility of membranes, nanofibrous sensors cannot only be applied in high-end analyte detection, but also in personal, daily use. Many different nanofibrous sensors have already been designed; albeit, the most straightforward and easiest-to-interpret sensor response is a visual change in color, which is of particular interest in the case of warning signals. Recently, many researchers have focused on the design of so-called colorimetric nanofibers, which typically involve the incorporation of a colorimetric functionality into the nanofibrous matrix. Many different strategies have been used and explored for colorimetric nanofibrous sensor design, which are outlined in this feature article. The many examples and applications demonstrate the value of colorimetric nanofibers for advanced optical sensor design, and could provide directions for future research in this area.

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“…Several methods for the detection of Rhodamine B in food have been developed, with the common analytical methods including HPLC-UV [3,4], HPLC-Flu [5][6][7], LC-PDA [8,9], LC-MS [10], thin-layer chromatography [11] and spectophotometric flow-injection. Because high level of interferences bring difficulties for detection of Rhodamine B in foods, the pre-concentration separation methods including solid phase extraction [12], solvent extraction, gel chromatography purification and immunoaffinity chromatography( IAC) column purification are widely used [13]. However, these methods often involve time consuming, solvent consuming and sample preparation steps, such as solvent extraction, concentration and cleanup, before chromatography analysis.…”

Section: Introductionmentioning

confidence: 99%

Application of Packed-nanofibers Solid-phase Extraction for Determination of Rhodamine B in Sausage

Wei¹,

Deng²,

Kang³

et al. 2019

J. Food Eng. Tech.

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A method for the determination of Rhodamine B in sausage was developed and validated. After extraction of Rhodamine B with acetonitrile from foodstuffs, a novel electrospun polymer nanofibers packed micro-column was used for cleaning and concentrating of the analyte in the sample. High performance liquid chromatography with fluorescence detection (HPLC-Flu) was used for the determination of Rhodamine B in the sample. The mobile phase was composed of 3.0 g L-1 phosphate buffer and methanol (3:7, volume ratio), and the pH was adjusted to 7. 0 with orthophosphoric acid. The results showed that the standard curve was linear over the validated concentrations range of 2-500 ng g-1, and the limit of detection (LOD) and the limit of quantitation (LOQ) for Rhodamine B spiked samples was 0. 2 ng g-1 and 0. 7 ng g-1, respectively. The average recoveries of Rhodamine B were 90.4% -94.3% for sausage, and the relative standard deviation of the method was from 1.7% to 3.8%. This proposed method was applied to real sample, and there was no Rhodamine B found in sausage.

show abstract

A colorimetric probe for ascorbic acid based on copper-gold nanoparticles in electrospun nylon

Cited by 25 publications

References 31 publications

Towards the development of solid-state platform optical sensors: aggregation of gold nanoparticles on polyurethane foam

Towards the development of solid-state platform optical sensors: aggregation of gold nanoparticles on polyurethane foam

Colorimetric Nanofibers as Optical Sensors

Application of Packed-nanofibers Solid-phase Extraction for Determination of Rhodamine B in Sausage

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