Characterization of pigments used in painting by means of laser-induced plasma and attenuated total reflectance FTIR spectroscopy

2009 ◽  
Vol 255 (10) ◽  
pp. 5172-5176 ◽  
Author(s):  
M.P. Mateo ◽  
T. Ctvrtnickova ◽  
G. Nicolas
Keyword(s):  
Ftir Spectroscopy ◽  
Attenuated Total Reflectance ◽  
Total Reflectance ◽  
Laser Induced Plasma ◽  
Reflectance Ftir

Rapid Determination of Free Fatty Acid Content in Waste Deodorizer Distillates Using Single Bounce-Attenuated Total Reflectance-FTIR Spectroscopy

2012 ◽  
Vol 95 (6) ◽  
pp. 1570-1573 ◽  
Author(s):  
Saba Naz ◽  
Sayed Tufail Hussain Sherazi ◽  
Farah N Talpur ◽  
Sarfaraz A Mahesar ◽  
Huseyin Kara
Keyword(s):  
Ftir Spectroscopy ◽  
Quantitative Assessment ◽  
Rapid Determination ◽  
Fatty Acid Content ◽  
Attenuated Total Reflectance ◽  
Calibration Model ◽  
Total Reflectance ◽  
Oil Processing ◽  
Reflectance Ftir

Abstract A simple, rapid, economical, and environmentally friendly analytical method was developed for the quantitative assessment of free fatty acids (FFAs) present in deodorizer distillates and crude oils by single bounce-attenuated total reflectance-FTIR spectroscopy. Partial least squares was applied for the calibration model based on the peak region of the carbonyl group (C=O) from 1726 to 1664 cm–1 associated with the FFAs. The proposed method totally avoided the use of organic solvents or costly standards and could be applied easily in the oil processing industry. The accuracy of the method was checked by comparison to a conventional standard American Oil Chemists' Society (AOCS) titrimetric procedure, which provided good correlation (R = 0.99980), with an SD of ±0.05%. Therefore, the proposed method could be used as an alternate to the AOCS titrimetric method for the quantitative determination of FFAs especially in deodorizer distillates.

Operando Attenuated Total Reflectance FTIR Spectroscopy: Studies on the Different Selectivity Observed in Benzyl Alcohol Oxidation

ChemCatChem ◽  
2015 ◽  
Vol 7 (16) ◽  
pp. 2534-2541 ◽  
Author(s):  
Alberto Villa ◽  
Davide Ferri ◽  
Sebastiano Campisi ◽  
Carine E. Chan-Thaw ◽  
Ye Lu ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Benzyl Alcohol ◽  
Alcohol Oxidation ◽  
Attenuated Total Reflectance ◽  
Total Reflectance ◽  
Benzyl Alcohol Oxidation ◽  
Reflectance Ftir ◽  
Spectroscopy Studies

Fabrication and characterization of chitosan/gelatin/thermoplastic polyurethane blend nanofibers

2018 ◽  
Vol 1 ◽  
pp. 251522111876932 ◽  
Author(s):  
Sadaf Samimi Gharaie ◽  
Sima Habibi ◽  
Hosein Nazockdast
Keyword(s):  
Thermoplastic Polyurethane ◽  
Attenuated Total Reflectance ◽  
Scanning Calorimetry ◽  
Polymer Blending ◽  
Total Reflectance ◽  
Mean Diameter ◽  
Fabrication And Characterization ◽  
Reflectance Ftir ◽  
Scanning Electron

Polymer blending is a method to provide nanocomposite nanofibers with improved strength and minimal defects. Chitosan exhibits biocompatibility, biodegradability, antimicrobial activity, and wound healing properties. A combination of gelatin and thermoplastic polyurethane (TPU) blends was explored as a means to improve the morphological deficiencies of chitosan nanofibers and facilitate its electrospinnability. The morphology of the electrospun chitosan, chitosan/gelatin, and chitosan/gelatin/TPU blend nanofibers were characterized using scanning electron microscopy (SEM), while the miscibility and thermal behavior of the blends were determined using differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy/attenuated total reflectance (FTIR/ATR). The optimum results were achieved in blend with 3 wt% chitosan, 8 wt% gelatin, and 5 wt% TPU, which resulted nanofibers with a mean diameter of 100.6 nm ± 17.831 nm.

scholarly journals Characterization of polysaccharides from Eremurus hissaricus roots by FTIR spectroscopy

2021 ◽  
Vol 11 (2) ◽  
pp. 281-289
Author(s):  
A. I. Ashurov ◽  
A. S. Dzhonmurodov ◽  
S. R. Usmanova ◽  
Sh. E. Kholov ◽  
Z. M. Muhidinov
Keyword(s):  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Absorption Maximum ◽  
Attenuated Total Reflectance ◽  
Pyranose Ring ◽  
Total Reflectance ◽  
Software Applications ◽  
Soluble Polysaccharide ◽  
Stretching Vibrations

The structure of water'soluble gluco' and galactomannans (GlcMan and GalMan) isolated from the roots of several Eremurus'related plant species has been studied previously. This article characterizes polysaccharides and other extraction products from the root tubers of Eremurus hissaricus by Fourier' transform infrared (FTIR) spectroscopy using an attenuated total reflectance (ATR) accessory. Polysaccharide samples were purified from protein substances with the Sevage method and discoloured through a polyamide column. In the FTIR spectra, the main peaks attributed to asymmetric and symmetric stretching vibrations of CH2 of the pyranose ring (for GluMan - 2886, 1373, 1244 cm-1; for GalGluMan - 2923, 1370, 1238 cm-1) were enhanced by purification after removing bound protein impurities. The KnownitAll and IR-Pal 2 software applications were used to examine the spectra of a sample of purified GalGluMan in the studied polysaccharides. The results show that the intensity of the absorption maximum decreased at 1732 cm-1. At the same time, at 1552.92 cm-1, a new band appeared that refers to the valence vibrations of carboxyl (CO) or nitroso (NO) groups in the purified polysaccharide. This band appeared as a result of the Maillard reaction between the protein and the reducing end of the polysaccharide unit. The intensity of the bands in the 1238-1244 cm-1 region also decreased in the purified samples, which may be due to the elimination of a small fraction of protein. The use of FTIR spectroscopy allows the process of purifying watersoluble GluMan and acid-soluble polysaccharide of GalGluMan from acrylamide impurities to be characterized timely and accurately. Additionally, this method allows a comparative estimation of functional groups in polysaccharides of the root tubers of E. hissaricus.

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