Rapid identification of artificial and natural food colorants with surface enhanced Raman spectroscopy

Gukowsky, Joshua C.; Xie, Tonya; Gao, Siyue; Qu, Yanqi; He, Lili

doi:10.1016/j.foodcont.2018.04.058

Cited by 51 publications

(24 citation statements)

References 20 publications

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“…Synthetic dyes are preferred to natural dyes precisely because of their color and stability during processing and storage. However, there are associations between the consumption of these dyes and diseases such as cancer and allergies (Gukowsky et al, 2018). The BO_B beverage was significantly preferred over the commercial product, providing motivation for further work with natural dyes obtained from jaboticaba.…”

Section: Sensory Analysismentioning

confidence: 99%

Development of isotonic beverage with functional attributes based on extract of Myrciaria jabuticaba (Vell) Berg

et al. 2020

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Recent study by Barros et al. (2019) analyze the influence of different types of acids and pH on the recovery of bioactive compounds present in jabuticaba peel. They found that the hydroethanolic mixture (ethanolI:water 50I:50 v.v-1) at pH 1.0 acidified with formic acid stood out from the others. Hus, there is a growing application of jabuticaba peel extract in several products, such as Petit Suisse cheese (Pereira et al., 2016a, b) and mortadella (Baldin et al., 2018).

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Section: Sensory Analysismentioning

confidence: 99%

Development of isotonic beverage with functional attributes based on extract of Myrciaria jabuticaba (Vell) Berg

et al. 2020

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“…Surface-Enhanced Raman Scattering (SERS) is becoming a versatile spectroscopic technique in different scientific fields, such as analytical chemistry, for the detection of analytes/contaminants [1,2] at trace levels, even reaching single-molecule detection [3], biochemistry and forensic medicine, [4,5,6] for the detection of RNA by the recognition of adenine and cytosine using silver nanoparticles, pharmaceutical medicine [7], in the study of new target drugs, and other applications in restoration and artistic heritage [8], archeology [8], food [9,10], etc. ; that is, most SERS studies deal with the molecular recognition of vibrational fingerprints of molecules at low concentration.…”

Section: Introductionmentioning

confidence: 99%

A DFT Approach to the Surface-Enhanced Raman Scattering of 4-Cyanopyridine Adsorbed on Silver Nanoparticles

et al. 2019

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A Surface-Enhanced Raman Scattering (SERS) spectrum of 4-cyanopyridine (4CNPy) was recorded on silver plasmonic nanoparticles and analyzed by using Density Functional Theory (DFT) calculations. Two simple molecular models of the metal–4CNPy surface complex with a single silver cation or with a neutral dimer (Ag+–4CNPy, Ag2–4CNPy), linked through the two possible interacting sites of 4CNPy (aromatic nitrogen, N, and nitrile group, CN), were considered. The calculated vibrational wavenumbers and intensities of the adsorbate and the isolated species are compared with the experimental Raman and SERS results. The analysis of the DFT predictions and the experimental data indicates that 4CNPy adsorbs preferentially on neutral/charged active sites of the silver nanoparticles through the nitrogen atom of the aromatic ring with a perpendicular orientation.

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“…Surface-enhanced Raman spectroscopy (SERS) technique has received a lot of attention and has been adopted in various analytical fields in recent years, due to the advantages of high sensitivity, fast detection speed, simple operation, as well as the ability to provide the fingerprint molecular information of the analytes. [10][11][12][13] SERS refers to the million-fold enhancement of the Raman scattering signal of the molecules adsorbed on a roughened metallic surface or nanostructures. This enhancement phenomenon is mainly the localized surface plasmon resonance generated in the near field of metallic nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Rapid and sensitive detection of pesticide residues using dynamic surface‐enhanced Raman spectroscopy

Chen

Long

Song

et al. 2020

J Raman Spectroscopy

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Pesticide residues are one of the major food safety concerns for consumers all over the world, and it is crucial to develop simple, rapid, and effective method for the detection of pesticide residues. In the study, we report the sensitive detection of pesticides with the dynamic surface‐enhanced Raman spectroscopy (dynamic SERS) method. The dynamic SERS method provides excellent detection sensitivity at the metastable state of plasmonic nanoparticles in the sessile drop, which is a critical state between the wet state and dry state during the volatilization process. With this simple and rapid method, the SERS performance towards four pesticides, paraquat, thiabendazole, tricyclazole, and isocarbophos, is investigated with silver nanoparticles (AgNPs) as the enhancing reagents. The characteristic SERS spectra of paraquat, thiabendazole, tricyclazole, and isocarbophos can be detected at concentrations down to 1 × 10−9 M, 5 × 10−9 M, 5.28 × 10−9 M, and 3.45 × 10−7 M, respectively. The pesticides are also discriminable at the same concentrations as the standard solution counterparts from the pesticides spiked vegetable extracts, and linear relationship can be drawn from the characteristic peak intensities and negative logarithm of concentrations of the four pesticides. Therefore, the simple and rapid dynamic SERS method shows great potential in the practical detection of pesticide residues.

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Rapid identification of artificial and natural food colorants with surface enhanced Raman spectroscopy

Cited by 51 publications

References 20 publications

Development of isotonic beverage with functional attributes based on extract of Myrciaria jabuticaba (Vell) Berg

Development of isotonic beverage with functional attributes based on extract of Myrciaria jabuticaba (Vell) Berg

A DFT Approach to the Surface-Enhanced Raman Scattering of 4-Cyanopyridine Adsorbed on Silver Nanoparticles

Rapid and sensitive detection of pesticide residues using dynamic surface‐enhanced Raman spectroscopy

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