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Showing 1 to 20 of 28 for “"Infrared Spectrometry"”.
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Hyphenated fourier transform infrared spectrometry: techniques for separations and analysis
… to fall in the low (10 - 25) ng range. The infrared spectra are enhanced over those acquired with a flow cell interface because CO₂ absorbance bands no longer obscure a portion of the analyte absorption spectrum.
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Infrared spectrometry of high polymers in the overtone and combination regions
… improvement or development of film lamination. Infrared spectrometry has been used to study the structures of plastics in the 3.0 - 100 micron region. It was decided that a study of infrared spectrometry in the 1.0 - 3.5 region could provide a tool for studying bonding mechanisms between …
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Toward Rapid Silica Analysis of CPDM Samples using Portable Fourier Transform Infrared Spectrometry
… portable direct-on-filter Fourier Transform infrared spectroscopy (DOF-FTIR) to rapidly quantify quartz, the primary analyte of silica in coal mines. The research consisted of four studies that developed and evaluated a three-step process for dust recovery, deposition, and analysis. These …
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Supercritical fluid extraction/chromatography and Fourier transform infrared spectrometry: methods optimization and applications
… fluid chromatography (SFC) and Fourier transform infrared spectrometry (FT-IR). In order to study the effects of a supercritical mobile phase on the resulting IR spectra, carbon dioxide was compared to xenon as a supercritical fluid mobile phase for flow cell SFC/FT-IR. A packed capillary column …
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Infrared spectrometry as a high performance liquid chromatographic detector with application to solvent refined coal products
The development of Infrared Spectrometry as a High Performance Liquid Chromatographic detector is presented. Early work with both a conventional dispersive instrument and a Fourier Transform Infrared (FTIR) Spectrometer is presented coupled via a flow cell to size exclusion chromatography. These …
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Development of an antirheumatic drug
… using the physical techniques, NMR, mass- and infrared spectrometry. The stability constants of the complexes of Mg, Ca, Zn and several first transition metal-ions with the ligands were determined potentiometrically. The solution conformation of the CuII complexes were determined using visible …
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Semiconducting tin oxide and cobalt oxide films for future solar energy applications
… were X-ray diffraction, visible and infrared spectrometry, electron spectroscopy for chemical analysis, scanning electron microscopy, heat treatment, and electrical resistivity measurement carried out at different temperatures. The information obtained from this investigation has shed …
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Characterization of modified polyimide adhesives
… the polyisoimide prepolymer were monitored using infrared spectrometry and differential scanning calorimetry. Both the crosslinking and isomerization reactions were found to be apparently first order with the isomerization having a lower activation energy than the crosslinking. Linear, high …
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Dietary Control of Cystinuria in Maned Wolves (Chrysocyon Brachyurus)
… days, purified by sublimation, and analyzed by infrared spectrometry. It was determined that total body water, water turnover rate and body composition were 17.2 L, 2.3 L/d, and 20.5% fat; 79.5% lean, respectively. These results are comparable to published values for dogs.
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Laboratory and Field Evaluation of Two Warm-Mix Additives in Connecticut and Validation of an Alternative Moisture Susceptibility Test
… before and after the test were analyzed using Infrared Spectrometry. The warm-mix specimens were MiST conditioned and compared to the traditional Tensile Strength Ratio as well as the change in bulk specific gravities. The results were mixed results of HMA and WMA specimens. Furthermore, the …
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Metal/polymer interactions
… as well as, surface Fourier transform infrared spectrometry have been used to characterize both the surface and interfacial regions of these films.
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Spectral Signature Modification By Application Of Infrared Frequency-selective Surfaces
… signature of a surface, particularly in the infrared (IR) region of the electromagnetic spectrum. To alter the surface signature in the IR, two methods are investigated: thin film application and antenna array application. The former approach is a common and straightforward incorporation of …
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Effects Of De-Polymerization Of Cellulose In Producing Sugar From Cellulosic Biomass At Low-Temperature
… is the only product produced. Fourier transform infrared spectrometry (FTIR) results showed a sharp peak in both 3400cm-1 and 1500 cm-1 region for pretreated samples, which explains less hydrogen bonding can allow urea hydrates self-assembled at the surface of the NaOH for enzymatic hydrolysis. …
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Enantiomeric separations by HPLC:temperature, mobile phase, flow rate and retention mechanism studies
… to a l000-Å gold surface, with Fourier-Transform Infrared Spectrometry in a Reflectance-Absorbance mode, to probe the specific molecular interactions which make possible the diasteriomeric complex. This <i>in situ</i> experiment, in contrast to previous <i>ex situ</i>, stationary phase work, is …
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Assessment of coal liquefaction behavior through product characterization with hyphenated chromatographic/spectroscopic methods
… by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) and Size Exclusion Chromatography/ICP-AES (SEC/ICP-AES). Pates of basic nitrogen components in distillate and solvent-soluble residuum products were examined by nitrogen mass balance determinations, Gas Chromatography/Pourier …
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Photoluminescence Study of Defects in Mercury Cadmium Telluride
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-10-12T20:59:11Z No. of bitstreams: 1 Furstenberg_Robert.pdf: 3021685 bytes, checksum: 9b448a1e45eb387f0bf81d018a5a9ff9 (MD5)
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Adaptability of gait in stroke survivors
… Study 3 evaluated the use of functional near-infrared spectrometry (fNIRS) to measure activation of prefrontal cortex activation (brain networks responsible for executive function) in target stepping conditions which can be expected to increase challenge to executive function. fNIRS showed …
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Risk mapping of eMalahleni municipal area with focus on coal mining impacts
… environmental risk management. Aerial thermal infrared spectrometry is a technique which can be used to detect coal fires. The technique produces thermal infrared images which can be mosaicked in a GIS program and classified to indicate the localities of coal fires. Subsidence can be detected …
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Synthesis and characterization of precursors for chemical vapor deposition of metal oxide thin films
… analysis and proton nuclear magnetic resonance spectrometry (NMR). Purity of T8 was confirmed by proton NMR. Isothermal gravimetric analysis (TGA) was used to study volatility and thermal stability of the precursors. The Zr(thd)₄ isotherms ranged from 180-260 °C, the Pb(thd)₂ and Pb(fod)₂ …
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