Detectors, infrared deuterated triglycine

Deuterated triglycine sulfate (abbreviated DTGS) is a common ferroelectric infrared detector material. Explain how it works. 

The infrared absorption spectrum of atorvastatin calcium, Form-I, was obtained using a Nicolet FT-IR Impact 410 spectrophotometer equipped with deuterated triglycine sulfate detector, and using Omnic 5.1 a software. The sample was contained in a pressed KBr pellet, with each spectrum being derived from 16 single scans over the range of 4000-400 cm-1 at a... 

FTIR Spectroscopy. Infrared spectra were recorded on a Perkin Elmer Spectrum One FTIR spectrometer equipped with a Deuterated Triglycine Sulfate (DTGS) detector and KBr optics. Data collection was performed at 4 cm-1 spectral resolution in the region of 4000-450 cm-1 and averaged over 5 scans. All samples were measured in transmission mode. 

A technique which has proven useful for our studies is that of cylindrical internal reflectance (CIR), coupled with a Fourier transform infrared spectrometer. In this study, an IBM-85 FTIR equipped with either a DTGS (deuterated triglycine sulfate) or MCT (mercury-cadmium-tellurium) detector was used. The infrared radiation is focused by concave mirrors onto the 45° conical ends of a transmitting crystal (Figure 1). The crystal may be made of any material which is optically transparent, has a high mechanical strength and high index of refraction, and is resistant to thermal shock and chemical attack. Suitable materials include ZnS, ZnSe,... 

Fourier transform mid-infrared (FTIR), near-infrared (FTNIR), and Raman (FT-Raman) spectroscopy were used for discrimination among 10 different edible oils and fats, and for comparing the performance of these spectroscopic methods in edible oil/fat studies. The FTIR apparatus was equipped with a deuterated triglycine sulfate (DTGS) detector, while the same spectrometer was also used for FT-NIR and FT-Raman measurements with additional accessories and detectors. The spectral features of edible oils and fats were studied and the unsaturation bond (C=C) in IR and Raman spectra was identified and used for the discriminant analysis. Linear discriminant analysis (LDA) and canonical variate analysis (CVA) were used for the disaimination and classification of different edible oils and fats based on spectral data. FTIR spectroscopy measurements in conjunction with CVA yielded about 98% classification accuracy of oils and fats followed by FT-Raman (94%) and FTNIR (93%) methods however, the number of factors was much higher for the FT-Raman and FT-NIR methods. 

The middle infrared (MIR) spectra were obtained with FTIR spectrometers (Nicolet 60SX, resolution = 2 cm Perkin Elmer System 2000, resolution 2cm , both the spectrometers equipped with deuterated triglycine sulfate, DTGS, detector), either by transmission through self-supporting silica disks or from diffuse reflectance of silica powder. Silica disks pressed under 50 MPa could be evacuated with a residual pressure under 10 Pa. The spectra are shown in a normalized absorbance scale, according to... 

Detectors. In mid-infrared spectroscopy, there are really only two detectors which are commonly used. These are the deuterated triglycine sulphate (DTGS) or the mercury cadmium telluride (MCT) detector. 

FT-IR Optical Interface. The optical interface employed an aluminum base-plate attached to a Bomem MB-155 interferometer (see Figure 5). The baseplate extended over the burner and supported a deuterated triglycine sulfate (DTGS) detector. A hole was located in the middle of the base-plate to pass the flame. Two mirrors were mounted on pitch and yaw stages to transmit the infrared beam from the interferometer through the flame to an off-axis parabolic mirror,... 

Capillary Electrophoresis Chemical Warfare Agents Chemical Weapons Convention Deuterated L-Alanine Triglycine Sulfate Dimethyl Ethylphosphonate Dimethyl Isopropylphosphonate Dimethyl Methylphosphonate Dimethyl Propylphosphonate Dimercaptotoluene Diffuse Reflectance Infrared Fourier Transform Functional Group Chromatograms Flame-Ionization Detector Fourier Transform Infrared Spectroscopy Gas Chromatography Gas Chromatography/Chemical Ionization/Mass Spectrometry Gas Chromatography/Chemical Ionization/Tandem Mass Spectrometry... 

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