Calculation of the Band Intensities of the IR Spectra of Oriented Polymers

Abdulov, Kh. Sh.

doi:10.1023/b:japs.0000046287.21384.7f

Cited by 2 publications

(2 citation statements)

References 3 publications

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“…The same experimental procedure was then performed for the selected IL solution with a concentration of 5000 ppm in SW, FW, dSW2000, and dFW2000 to determine the effect of salinity on the fluid–fluid interfacial behavior. It should be noted that, despite the high applicability of ATR-FTIR analysis in the detection of organic materials and molecular bands, it lacks a good efficiency in the presence of polar solvents, attributed to the dependency of the obtained peak intensity to several factors including the polarity of the molecules and the strength of the bond. − This inefficiency was obvious in the results of ATR-FTIR analysis from the water phase near the interface of oil and water because of the high polarity and a strong hydrogen bond of the water molecules. The results show an intensive broad peak belonging to the O–H bond that overlaps and covers the other peaks belonging to the ILs along with its significant high intensity, making the other peaks a low intense vibrational noise.…”

Section: Methodsmentioning

confidence: 99%

Mechanistic Investigation of the Synergy of a Wide Range of Salinities and Ionic Liquids for Enhanced Oil Recovery: Fluid–Fluid Interactions

et al. 2021

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In this paper, the performance of three imidazolium-based ionic liquids (ILs) including 1-hexyl-3-methylimidazolium chloride ([HMIM][Cl] or IL6), 1-octyl-3-methylimidazolium chloride ([OMIM][Cl] or IL8), and 1dodecyl-3-methylimidazolium chloride ([DMIM][Cl] or IL12) in reducing the interfacial tension (IFT) between crude oil and IL solutions was analyzed for the first time under a wide range of salinities (1000 to 195 476 ppm) at a reservoir temperature of 80 °C. The purpose was to microscopically analyze the occurring phenomenon at the fluid−fluid interface to determine the mechanism leading to oil extraction and to address the existing ambiguities in the literature concerning the synergism between ILs and different types/concentrations of ions. The quality of the synthesized ILs and their accumulation at the crude oil/IL solution interface was analyzed via attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy, the IFT between crude oil and IL solutions was measured by the pendant drop method, and the micelles' size distribution and molecular diffusivity of the ILs in the aqueous solution was measured by the dynamic light scattering (DLS) technique. On the basis of the ATR-FTIR and IFT results, the accumulation of the ILs molecules at the interface of the crude oil/IL solution was a function of alkyl chain length and the ionic strength (IS) of solution; the longer alkyl chain ILs (i.e., IL12 in this study) accumulated more at the interface of the solution with more IS, leading to a more IFT reduction. At a constant but low range of salinities, the longer alkyl chain IL exhibited a lower IFT value in the presence of diluted seawater (dSW) than the diluted formation water (dFW). This is because of the higher concentration of divalent cations (Mg 2+ and Ca 2+ ) in dSW than dFW and their interactions with resin and asphaltene molecules and the salting-in effect mechanism that overcomes the lower saponification ability of dSW than dFW.

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Section: Methodsmentioning

confidence: 99%

Mechanistic Investigation of the Synergy of a Wide Range of Salinities and Ionic Liquids for Enhanced Oil Recovery: Fluid–Fluid Interactions

et al. 2021

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“…The intensity and area of spectral bands were measured and calculated using OMNIC (Thermo Electron Inc. San Jose, CA, USA) and Origin ® 160 8.1 (OriginLab Co., Northampton, MA, USA) software packages, with the principles for these analytical methods as described [13,14]. Either equation presented above could be successfully applied for spectral data conversion for PI prediction models.…”

Section: Band Intensity Of Spectra Glass Slide=peak Intensity Of Specmentioning

confidence: 99%

Determining Ovarian Maturity in Farmed Sturgeon 1 (Acipenser transmontanus) for Caviar Production Using Fourier Transform Infrared Spectroscopy (FT-IR)

JPV¹

2014

J Aquac Res Development

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Ovarian maturity of white sturgeon (Acipenser transmontanus, Acipenseridae) farmed in California (Sterling Caviar, LLC) (N=400) and Idaho (Fish Breeders and Blind Canyon Aqua Ranch) (N=143) was determined by correlating blood plasma spectral features [(Fourier transform infrared (FT-IR, 4000-400 cm -1 ) spectroscopy] with oocyte polarization index (PI), an index of germinal vesicle migration. A total of ~20,000 spectra were collected over a period of four years (2007, 2008, 2009 and 2010). Mathematical models could predict maturity in fish at a later year of harvest (i.e., 2010) and at either the California or Idaho production sites. PI values of 0.10, 0.15, and 0.20 were selected for segregating fish into subgroups based on ovarian maturity. Spectral features for specific proteins, lipids, carbohydrates and nucleic acids were related to fish maturity stages. Mathematical models could predict the actual PI values based on plasma spectral features in fish from 2010 based on models developed and validated from fish harvested in [2007][2008][2009]. These models worked equally well whether the fish were raised in California or Idaho. This research indicates that infrared spectroscopy provides a rapid and less invasive method to segregate sturgeon females according to maturity levels and has the potential to substitute for the traditional surgical biopsy to determine stage of maturity.

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Calculation of the Band Intensities of the IR Spectra of Oriented Polymers

Cited by 2 publications

References 3 publications

Mechanistic Investigation of the Synergy of a Wide Range of Salinities and Ionic Liquids for Enhanced Oil Recovery: Fluid–Fluid Interactions

Mechanistic Investigation of the Synergy of a Wide Range of Salinities and Ionic Liquids for Enhanced Oil Recovery: Fluid–Fluid Interactions

Determining Ovarian Maturity in Farmed Sturgeon 1 (Acipenser transmontanus) for Caviar Production Using Fourier Transform Infrared Spectroscopy (FT-IR)

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