Detection and quantification of food colorant adulteration in saffron sample using chemometric analysis of FT-IR spectra

Karimi, Sadegh; Feizy, Javad; Mehrjo, Fatemeh; Farrokhnia, Maryam

doi:10.1039/c5ra25983e

Cited by 90 publications

(41 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The vibration at ~1647 cm −1 is attributed to the characteristic behavior of Mn (from Mn 3 O 4 ) interacting with C=O groups [43]. A characteristic C–C stretching vibration is observed at 1583 cm −1 [44]. For the S1 nanocomposites, the peaks at 1483 and 1415 cm −1 are attributed to the symmetric stretching of CH 3 groups and C–H bending vibrations, respectively [29,44].…”

Section: Resultsmentioning

confidence: 99%

“…A characteristic C–C stretching vibration is observed at 1583 cm −1 [44]. For the S1 nanocomposites, the peaks at 1483 and 1415 cm −1 are attributed to the symmetric stretching of CH 3 groups and C–H bending vibrations, respectively [29,44]. Peaks at 1373, 1259, and 1151 cm −1 are attributed to the –CH 3 out-of-plane, OH in-plane, and C–N in-plane bending vibrations, respectively [43].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Antibacterial Properties of Novel ZnMn2O4–Chitosan Nanocomposites

et al. 2019

View full text Add to dashboard Cite

The development of productive antibacterial agents from nontoxic materials via a simple methodology has been an immense research contribution in the medicinal chemistry field. Herein, a sol–gel one-pot reaction was used to synthesize hybrid composites of hausmannite–chitosan (Mn3O4–CS) and its innovative derivative zinc manganese oxide–chitosan (ZnMn2O4–CS). Fixed amounts of CS with different metal matrix w/v ratios of 0.5%, 1.0%, 1.5%, and 2.0% for Mn and Zn precursors were used to synthesize ZnMn2O4–CS hybrid composites. X-ray diffraction analysis indicated the formation of polycrystalline tetragonal-structured ZnMn2O4 with a CS matrix in the hybrids. Fourier-transform infrared spectroscopic analysis confirmed the formation of ZnMn2O4–CS hybrids. Detailed investigations of the surface modifications were conducted using scanning electron microscopy; micrographs at different magnifications revealed that the composites’ surface changed depending on the ratio of the source materials used to synthesize the ZnMn2O4–CS hybrids. The antibacterial activity of the Mn3O4–CS and ZnMn2O4–CS composites was tested against various bacterial species, including Bacillus subtilis, Escherichia coli, Salmonella typhi, and Pseudomonas aeruginosa. The zone of inhibition and minimum inhibitory concentration values were deduced to demonstrate the efficacy of the ZnMn2O4–CS nanocomposites as antibacterial agents.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Synthesis and Antibacterial Properties of Novel ZnMn2O4–Chitosan Nanocomposites

et al. 2019

View full text Add to dashboard Cite

show abstract

“…(2003) applied FT-IR and FT-Raman spectroscopy for detection of carcinogenic compounds (methyleugenol and estragole) in basil [ 60 ]. Similarly, FT-IR was applied for detection and quantification of food colorants such as Tartrazine, Sunset yellow, Szorubine, Quinoline-yellow, Allura red, and Sudan II in saffron [ 61 ].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Turmeric Powder Adulterated with Metanil Yellow Using FT-Raman and FT-IR Spectroscopy

Dhakal

Chao

Schmidt

et al. 2016

Foods

119

View full text Add to dashboard Cite

Turmeric powder (Curcuma longa L.) is valued both for its medicinal properties and for its popular culinary use, such as being a component in curry powder. Due to its high demand in international trade, turmeric powder has been subject to economically driven, hazardous chemical adulteration. This study utilized Fourier Transform-Raman (FT-Raman) and Fourier Transform-Infra Red (FT-IR) spectroscopy as separate but complementary methods for detecting metanil yellow adulteration of turmeric powder. Sample mixtures of turmeric powder and metanil yellow were prepared at concentrations of 30%, 25%, 20%, 15%, 10%, 5%, 1%, and 0.01% (w/w). FT-Raman and FT-IR spectra were acquired for these mixture samples as well as for pure samples of turmeric powder and metanil yellow. Spectral analysis showed that the FT-IR method in this study could detect the metanil yellow at the 5% concentration, while the FT-Raman method appeared to be more sensitive and could detect the metanil yellow at the 1% concentration. Relationships between metanil yellow spectral peak intensities and metanil yellow concentration were established using representative peaks at FT-Raman 1406 cm−1 and FT-IR 1140 cm−1 with correlation coefficients of 0.93 and 0.95, respectively.

show abstract

“…The analysis was performed to identify the key functional groups responsible for the improvement in weather resistance of SLS parts due to UV-326 and UV-328. In the analysis of the initial spectra of P/L, P/L-6, and P/L-8 ( Figure 6 a), the main peaks for copolyester were assigned as follows: two minor peaks at 2957 and 2919 cm −1 corresponded to the asymmetric stretching vibrations of CH groups [ 11 , 12 ], a peak at 2847 cm −1 corresponded to the symmetric stretching vibrations of CH groups [ 13 ], a peak at 1713 cm −1 was attributed to the stretching of carbonyl groups (C=O) present in ester groups [ 14 ], a peak at 1406 cm −1 corresponded to OH bending [ 15 ], two peaks at 1268 and 1248 cm −1 corresponded to C-O-C asymmetric stretching in ester group [ 16 ], two peaks at 1115 and 1100 cm −1 were due to C-O stretching in the ester group [ 17 ], and a peak at 1013 cm −1 could be attributed to C-O stretching in hydroxyl groups [ 18 ]. The following peaks were assigned for limestone: a peak at 1436 cm −1 corresponded to asymmetric C-O stretching vibration, a peak at 872 cm −1 could be attributed to symmetric C-O stretching vibration, and a peak at 725 cm −1 was due to OCO bending (in-plane deformation) vibration [ 19 ].…”

Section: Resultsmentioning

confidence: 99%

Improvement of the Weather Resistance of a Selective Laser-Sintered Copolyester–Limestone Composite Using UV-326 and UV-328

2020

View full text Add to dashboard Cite

A copolyester–limestone composite fabricated with selective laser sintering technology is a potential material for the repair of ancient brick structures damaged by the sun and rain, however the weather resistance of this material must be improved. Herein, UV-236 and UV-328 were employed as UV stabilizers and added into the composite. The results show that the addition of UV-326 and UV-328 effectively inhibited the degradation of CH and ester groups and the formation of hydroxyl, carbonyl, and carboxyl groups. Thus, the stabilizers significantly reduced the color change and decline in mechanical properties of the composite under sun and rain conditions. The proposed strategy can be used for the repair of damaged precious brick buildings.

show abstract

Detection and quantification of food colorant adulteration in saffron sample using chemometric analysis of FT-IR spectra

Abstract: The aim of present study is to investigate the combination of Fourier transform infrared spectroscopy with pattern recognition to recognize the standard saffron from those which have been adulterated with various types of food colorants.

Cited by 90 publications

References 24 publications

Synthesis and Antibacterial Properties of Novel ZnMn2O4–Chitosan Nanocomposites

Synthesis and Antibacterial Properties of Novel ZnMn2O4–Chitosan Nanocomposites

Evaluation of Turmeric Powder Adulterated with Metanil Yellow Using FT-Raman and FT-IR Spectroscopy

Improvement of the Weather Resistance of a Selective Laser-Sintered Copolyester–Limestone Composite Using UV-326 and UV-328

Contact Info

Product

Resources

About