In situ observation of infrared spectra of some molecular fragments and products in rf discharge plasmas generated in an absorption cell of a Fourier transform infrared spectrometer

1997 ◽  
Vol 68 (6) ◽  
pp. 2305-2311 ◽  
Author(s):  
K. Iinuma ◽  
N. Sasaki ◽  
T. Takahashi ◽  
M. Fujisawa ◽  
J. Suzuki ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Infrared Spectra ◽  
Fourier Transform Infrared ◽  
Rf Discharge ◽  
In Situ Observation ◽  
Absorption Cell ◽  
Molecular Fragments ◽  
Discharge Plasmas ◽  
Infrared Spectrometer

Fourier Transform Infrared Spectrometer Coupled with Electrothermal Atomizer for High-Temperature Vapor-Phase Investigations

1984 ◽  
Vol 38 (5) ◽  
pp. 715-720 ◽  
Author(s):  
Paolo Tittarelli ◽  
Tiziana Zerlia ◽  
Giovanna Ferrari
Keyword(s):  
Fourier Transform ◽  
Vapor Phase ◽  
Fourier Transform Infrared ◽  
Infrared Spectrometry ◽  
Pyrolysis Products ◽  
Electrothermal Atomizer ◽  
Infrared Spectrometer ◽  
Ft Ir ◽  
Phase Behaviors

An electrothermal atomizer is employed to vaporize solid samples of pigments at temperatures ranging from 150°C to 1000°C The evolution of vapors is followed by Fourier transform infrared spectrometry (FT-IR) The atomizer acts at the same time as vapor supplier and vapor holder This coupling allows the investigation in situ of vaporization or pyrolysis phenomena avoiding the use of heated transfer pipes The pigments examined in this study show various vapor-phase behaviors Some pigments vaporize without appreciable decomposition at temperatures from 400°C to 950°C, while other pigments investigated decompose during the heating and originate pyrolysis products whose evolution is monitored continuously by the FT-IR spectrometer

Improved Sensitivity for in Situ Infrared Identification of Species Separated by Thin-Layer Chromatography Using Programmed Multiple Development

1977 ◽  
Vol 31 (6) ◽  
pp. 528-530 ◽  
Author(s):  
Maria M. Gomez-Taylor ◽  
Peter R. Griffiths
Keyword(s):  
Fourier Transform ◽  
Thin Layer ◽  
Thin Layer Chromatography ◽  
Cadmium Telluride ◽  
Infrared Spectra ◽  
Mercury Cadmium Telluride ◽  
Identification Of Species ◽  
Infrared Spectrometer ◽  
Layer Chromatography

A method is described for measuring the infrared spectra of submicrogram quantities of materials separated by thin-layer chromatography (TLC) without removing the sample from the plate. The use of programmed multiple development for the chromatography concentrates each spot of sample on the TLC plate by approximately a factor of 4 compared to conventional TLC. A Fourier transform infrared spectrometer equipped with a mercury cadmium telluride detector enables recognizable spectra to be measured in less than 10 s.

The KBr Pellet: A Useful Technique for Obtaining Infrared Spectra of Inorganic Species

1979 ◽  
Vol 33 (6) ◽  
pp. 581-584 ◽  
Author(s):  
R. M. Gendreau ◽  
R. Burton
Keyword(s):  
Fourier Transform ◽  
Standard Deviation ◽  
Sample Preparation ◽  
Infrared Spectra ◽  
Fourier Transform Infrared ◽  
Spectral Matching ◽  
Inorganic Species ◽  
Fourier Transform Infrared Spectrometer ◽  
Infrared Spectrometer ◽  
Sulfate Species

The reproducibility of the KBr pelleting technique for inorganic sulfates was assessed using a Fourier transform infrared spectrometer. Day-to-day variation in peak frequencies of selected bands had standard deviations ranging from 0. to 1.5 cm−1. This 1 cm−1 standard deviation was shown to be due to changes in bandshape, probably due to variations in sample preparation from operator to operator. It was concluded that the reproducibility of sulfates in KBr is sufficient to allow the design of computerized spectral matching programs to identify specific sulfate species based on band frequencies and intensities.

Photoacoustic Infrared Spectra (IR-PAS) of Aged and Fresh-Cleaved Coal Surfaces

1980 ◽  
Vol 34 (4) ◽  
pp. 407-408 ◽  
Author(s):  
Mark G. Rockley ◽  
J. Paul Devlin
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Infrared Spectra ◽  
Fourier Transform Infrared ◽  
Fourier Transform Infrared Spectrometer ◽  
Infrared Spectrometer ◽  
Effects Of Aging

The application of the newly developed technique of photoacoustic infrared spectroscopy, using a Fourier transform infrared spectrometer, to the measurement of the infrared spectra of single slabs of various coal types is described. The effects of aging of coal surfaces, which include both oxidation and abrasion, are clearly apparent in a comparison of the spectra of freshly cleaved and aged coal surfaces.

Synthesis, characterization, and their some chemical and biological properties of PVA/PAA/nPS hydrogel nanocomposites: Hydrogel and wound dressing

2020 ◽  
Vol 35 (3) ◽  
pp. 203-215
Author(s):  
Mehmet Emin Diken ◽  
Berna Koçer Kizilduman ◽  
Begümhan Yilmaz Kardaş ◽  
Enes Emre Doğan ◽  
Mehmet Doğan ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Acrylic Acid ◽  
Infrared Spectra ◽  
Vinyl Alcohol ◽  
Fourier Transform Infrared ◽  
Poly Vinyl Alcohol ◽  
Seed Particles ◽  
Fourier Transform Infrared Spectra ◽  
Hydrogel Nanocomposites ◽  
Poly Acrylic Acid

The nanocomposite hydrogels were prepared by dispersing of the nanopomegranate seed particles into poly(vinyl alcohol)/poly(acrylic acid) blend matrix in an aqueous medium by the solvent casting method. These hydrogels were characterized using scanning electron microscopy, Fourier transform infrared spectra, differential scanning calorimetry, and optical contact angle instruments. The nanopomegranate seed, blend, and hydrogel nanocomposites were tested for microbial activity. In addition, cytocompatibilities of these blend and hydrogel nanocomposites/composites were tested on human lymphocyte with in vitro MTS cell viability assays. Fourier transform infrared spectra revealed that esterification reaction took place among functional groups in the structure of poly(vinyl alcohol) and poly(acrylic acid). The hydrophilic properties of all hydrogels decreased with increasing nanopomegranate seed content. The mean diameters of the nanopomegranate seed particles were about 88 nm. Nanopomegranate seed particles demonstrated antibacterial properties against gram-positive bacteria, Staphylococcus aureus, and gram-negative bacteria, Escherichia coli. The lymphocyte viabilities increased after addition of nanopomegranate seeds into the polymer blend. The swelling behavior of blend and hydrogels was dependent on the cross-linking density created by the reaction between poly(vinyl alcohol)/poly(acrylic acid) blend and nanopomegranate seed. Scanning electron microscopy images were highly consistent with Fourier transform infrared spectra, differential scanning calorimetry, and antibacterial activity results.

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