perkin elmer ftir spectrum two

Angelo Vertti, 18 de setembro de 2022

Spectrum Spotlight 300IR; ATR; Spectrum Spotlight 300 IR ; Spectrum Spotlight 300MCT With over 75 years experience in infrared spectroscopy, we bring deep-seated expertise to a new generation of IR systems. 4(b). PERKIN-ELMER 521 (GRATING) Instrument parameters: FILTERS AT 3150, 2500, 2000, 1150, 700, 410 AND GRATING CHANGES AT 2000, 630 CM-1: Path length: 0.011, 0.011, AND 0.020 CM (CsBr CELL) Resolution: 4: Sampling procedure: TRANSMISSION: Data processing: DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS) Ideally suited to everyday analysis, you can In 1742, Swedish astronomer Anders Celsius (17011744) created a temperature scale that was the reverse of the scale now known as "Celsius": 0 represented the boiling point of water, while 100 represented the freezing point of water. Go To: Top, References, Notes Data compiled by: Coblentz Society, Inc. GAS (70 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH II) FROM HARD COPY; 2 cm-1 resolution; SOLUTION (10% IN CCl4 FOR 3800-1300, 10% IN CS2 FOR 1300-625, AND 10% IN CCl4 See Choosing Intro Courses for descriptions of the introductory The two diisopropylammonium cation displays intramolecular (N1-H1bO2 and N2-H2eO5) hydrogen bonding with dichromate anion. XPS, FTIR, EDX, and XRD Analysis of Al 2 O 3 Scales Grown on PM2000 Alloy: This work is an original example to compare the results obtained after calcination of Al 2 O 3 hydroxides and oxidation of alumino-formers alloys. Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. The ATR-FTIR spectra of CNT/NF-MA, CNT, CNT/NF and MA are shown in Fig. IR Spectrum. The observed band in the FTIR spectrum at 1721 cm 1, 1277, 1000 (Perkin Elmer, USA). An FTIR spectrometer Nicolet 8700 (Thermo Scientific, Inc., Santa Clara, CA, USA) was used to analyse FM flours, with wavelengths ranging from 400 to 4000 cm 1. The samples were mixed with standard KBr for FTIR measurements from 4000 to 400 cm 1 with a resolution of 4 cm 1 (FTIR-8400 S Shimadzu, Milton Keynes, UK). About 0.5 g of flours were mounted on the instrument and analysed, and the samples spectra were obtained. ftir blog; 35 1 pcu icp-oes; 19 (22) icp-ms Notes, Cautions and Warnings Ideally suited to everyday analysis, you can used to show that you have to press two keys at the same time, for example, ALT+F. Danbury, CT 06810) DuraScope single reflection diamond ATR. An FTIR spectrometer Nicolet 8700 (Thermo Scientific, Inc., Santa Clara, CA, USA) was used to analyse FM flours, with wavelengths ranging from 400 to 4000 cm 1. This confers a significant advantage over a dispersive spectrometer, which measures intensity over a narrow The recycled NMPCB powders were characterized by Fourier transform infrared (FTIR) spectroscopy (Perkin Elmer Spectrum One) to identify the functional groups and to confirm the surface modification of the recycled NMPCB powder. Fourier-transform infrared (FTIR) spectra (Spectrum One B, Perkin Elmer, USA) were applied to characterize the functional group changes of BSA. The Honors CHEM 145 Placement Exam is used for enrollment in CHEM 145. Notes, Cautions and Warnings The molecular weight distribution of BSA was analyzed by gel chromatography (EcoSEC HLC-8320, TOSOH, China). Fluorescence spectra were recorded in the range of 500 and 800 nm on a LS 50B spectrofluorometer (Perkin Elmer) for solutions with an absorbance at the excitation wavelength lower than 0.1. Notice: 3. Ideally suited to everyday analysis, you can This confers a significant advantage over a dispersive spectrometer, which measures intensity over a narrow The background spectrum was obtained by observing a water droplet on the diamond ATR surface. In 1742, Swedish astronomer Anders Celsius (17011744) created a temperature scale that was the reverse of the scale now known as "Celsius": 0 represented the boiling point of water, while 100 represented the freezing point of water. Meanwhile, GO characterized using FTiR shows that both samples contain several functional groups such as hydroxyl, epoxy, carboxyl and carbonyl. The recycled NMPCB powders were characterized by Fourier transform infrared (FTIR) spectroscopy (Perkin Elmer Spectrum One) to identify the functional groups and to confirm the surface modification of the recycled NMPCB powder. FTIR. All eight digit numbers are PerkinElmer part numbers unless stated otherwise. The concentration of Ce 4+ after the reaction was measured by ultravioletvisible spectroscopy (Perkin Elmer UV-VIS-NIR Spectrometer) with 316 nm of wavelength. From portable to ultrapowerful, our wide range of FTIR spectrometers provides you the accuracy, reliability, flexibility, and simplicity to meet all your current analysis needs today and expands as your goals evolve. ftir ftir As for the interaction between polymer network and organic ionic liquids, the thin film based on ion-dipole interaction had a thermopower of +26.1 mV/K ().In addition, by adjusting the composition of two type polymers, the controllable adjustment of thermopower from 4 mV/K to +14 mV/K was reported for the first time ().Above all, we can see that of the currently The equipment ran 32 scans for each spectrum collected . Easy to use, powerful, compact and robust Spectrum Two is the FT-IR spectrometer of choice for everyone, everywhere. The equipment ran 32 scans for each spectrum collected . From portable to ultrapowerful, our wide range of FTIR spectrometers provides you the accuracy, reliability, flexibility, and simplicity to meet all your current analysis needs today and expands as your goals evolve. Meanwhile, GO characterized using FTiR shows that both samples contain several functional groups such as hydroxyl, epoxy, carboxyl and carbonyl. FTIR spectra were recorded on a Perkin-Elmer Spectrum 100 spectrometer between wavenumbers of 4,000500 cm 1. ftir ftir XPS, FTIR, EDX, and XRD Analysis of Al 2 O 3 Scales Grown on PM2000 Alloy: This work is an original example to compare the results obtained after calcination of Al 2 O 3 hydroxides and oxidation of alumino-formers alloys. With over 75 years experience in infrared spectroscopy, we bring deep-seated expertise to a new generation of IR systems. The ATR-FTIR spectra of CNT/NF-MA, CNT, CNT/NF and MA are shown in Fig. 3.2.3. Fourier-transform infrared (FTIR) spectra (Spectrum One B, Perkin Elmer, USA) were applied to characterize the functional group changes of BSA. Easy to use, powerful, compact and robust Spectrum Two is the FT-IR spectrometer of choice for everyone, everywhere. Thermal detectors include thermocouples, thermistors, and pneumatic Figure 15.3 Schematic diagram of a commercial dispersive IR instrument, the Perkin-Elmer Model 237B Infrared Spectrometer. Spectrum Spotlight 300IR; ATR; Spectrum Spotlight 300 IR ; Spectrum Spotlight 300MCT ftir blog; 35 1 pcu icp-oes; 19 (22) icp-ms FTIR Analysis. The term instrument refers to either the Spectrum 100 FT-IR or Spectrum 100N FT-NIR spectrometer, and any sampling accessory fitted. The two diisopropylammonium cation displays intramolecular (N1-H1bO2 and N2-H2eO5) hydrogen bonding with dichromate anion. With fully integrated, robust universal sampling for trouble-free measurements and portability options, Spectrum Two is ideal for use in both laboratory and remote testing environments. The FTIR analysis of the synthesized Fe 2 O 3-NPs detected an outcome in the range of wavenumber 400-4000 cm-1 that ascertained the chemical bonds as well as functional groups (Figure 4).The FTIR spectrum of the synthesized Fe 2 O 3-NPs exhibited defined peaks at 517, 621, 1020, 1612, and 3435 cm 1.The appearance of two well With fully integrated, robust universal sampling for trouble-free measurements and portability options, Spectrum Two is ideal for use in both laboratory and remote testing environments. 3. The General Chemistry Placement Exam is used for enrollment in CHEM 110, 120, 142 or 143. Thus, this work aimed at isolating and characterizing the lignin from Eucalyptus spp. The FTIR analysis of the synthesized Fe 2 O 3-NPs detected an outcome in the range of wavenumber 400-4000 cm-1 that ascertained the chemical bonds as well as functional groups (Figure 4).The FTIR spectrum of the synthesized Fe 2 O 3-NPs exhibited defined peaks at 517, 621, 1020, 1612, and 3435 cm 1.The appearance of two well Lignin is an abundant biopolymer, as well as cellulose and hemicellulose. Thus, this work aimed at isolating and characterizing the lignin from Eucalyptus spp. IR Spectrum. FTIR. Most detectors used in dispersive IR spectrometers can be categorized into two classes: thermal detectors and photon detectors. The observed band in the FTIR spectrum at 1721 cm 1, 1277, 1000 (Perkin Elmer, USA). The pH values of all solutions were measured by pH meter (PHS-3C, China). 3.2.3. ftir blog; 35 1 pcu icp-oes; 19 (22) icp-ms Sawdust—a lignocellulosic waste generated in large amounts in sawmills—to evaluate its antioxidant capacity. FTIR spectra were recorded on a Perkin-Elmer Spectrum 100 spectrometer between wavenumbers of 4,000500 cm 1. Ideally suited to everyday analysis, you can Notice: As for the interaction between polymer network and organic ionic liquids, the thin film based on ion-dipole interaction had a thermopower of +26.1 mV/K ().In addition, by adjusting the composition of two type polymers, the controllable adjustment of thermopower from 4 mV/K to +14 mV/K was reported for the first time ().Above all, we can see that of the currently The FTIR spectrum for the BDIPADC crystal was traced on a Perkin Elmer RXI FTIR spectrophotometer using the KBr pellet technique in the wave-number range from 400 to 4000 cm 1. Sawdust—a lignocellulosic waste generated in large amounts in sawmills—to evaluate its antioxidant capacity. With fully integrated, robust universal sampling for trouble-free measurements and portability options, Spectrum Two is ideal for use in both laboratory and remote testing environments. ATR-FTIR Spectroscopy: A Perkin-Elmer (761 Main Ave., Norwalk, CT 06859) Series 1600 Fourier Transform Infrared spectrometer was used equipped with a SourceIR Technologies (15 Great Pasture Rd. The absorbance spectra were measured using UV/Vis/IR spectrophotometer (Lambda 950, Perkin Elmer, Singapore). The samples were mixed with standard KBr for FTIR measurements from 4000 to 400 cm 1 with a resolution of 4 cm 1 (FTIR-8400 S Shimadzu, Milton Keynes, UK). ftir ftir Optical rotations were recorded on a Perkin-Elmer Model-343 digital polarimeter (PerkinElmer. Notice: An FTIR spectrometer simultaneously collects high-resolution spectral data over a wide spectral range. Spectrum Spotlight 300IR; ATR; Spectrum Spotlight 300 IR ; Spectrum Spotlight 300MCT on a Thermo Fisher FTIR 200 spectrophotometer. In addition, due to the large agglomerates and contact between the flakes in E-GO sample, current-voltage pattern indicated the E-GO produced higher current flow than A-GO. The Department of Chemistry offers two placement exams to help students determine which introductory course is the best one for them. The pH values of all solutions were measured by pH meter (PHS-3C, China). In his paper Observations of two persistent degrees on a thermometer, he recounted his experiments showing that the melting point of ice is Thermal detectors include thermocouples, thermistors, and pneumatic Figure 15.3 Schematic diagram of a commercial dispersive IR instrument, the Perkin-Elmer Model 237B Infrared Spectrometer. FTIR spectra were recorded on a Perkin-Elmer Spectrum 100 spectrometer between wavenumbers of 4,000500 cm 1. In his paper Observations of two persistent degrees on a thermometer, he recounted his experiments showing that the melting point of ice is Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. All eight digit numbers are PerkinElmer part numbers unless stated otherwise. 4(b). XPS, FTIR, EDX, and XRD Analysis of Al 2 O 3 Scales Grown on PM2000 Alloy: This work is an original example to compare the results obtained after calcination of Al 2 O 3 hydroxides and oxidation of alumino-formers alloys. Spectrum 3 Optica IR Optica IR FTIR Analysis. Go To: Top, References, Notes Data compiled by: Coblentz Society, Inc. GAS (70 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH II) FROM HARD COPY; 2 cm-1 resolution; SOLUTION (10% IN CCl4 FOR 3800-1300, 10% IN CS2 FOR 1300-625, AND 10% IN CCl4 The concentration of Ce 4+ after the reaction was measured by ultravioletvisible spectroscopy (Perkin Elmer UV-VIS-NIR Spectrometer) with 316 nm of wavelength. With fully integrated, robust universal sampling for trouble-free measurements and portability options, Spectrum Two is ideal for use in both laboratory and remote testing environments. The two diisopropylammonium cation displays intramolecular (N1-H1bO2 and N2-H2eO5) hydrogen bonding with dichromate anion. Thus, this work aimed at isolating and characterizing the lignin from Eucalyptus spp. 4(b). ATR-FTIR Spectroscopy: A Perkin-Elmer (761 Main Ave., Norwalk, CT 06859) Series 1600 Fourier Transform Infrared spectrometer was used equipped with a SourceIR Technologies (15 Great Pasture Rd. Danbury, CT 06810) DuraScope single reflection diamond ATR. Spectrum 3 Optica IR Optica IR 3. Optical rotations were recorded on a Perkin-Elmer Model-343 digital polarimeter (PerkinElmer. In his paper Observations of two persistent degrees on a thermometer, he recounted his experiments showing that the melting point of ice is Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. A biorefinery perspective was utilized: the biomass was fractionated using a FTIR and XPS signatures were obtained for various oxidation temperatures and compared with those known from the literature about The Department of Chemistry offers two placement exams to help students determine which introductory course is the best one for them. The Honors CHEM 145 Placement Exam is used for enrollment in CHEM 145. Meanwhile, GO characterized using FTiR shows that both samples contain several functional groups such as hydroxyl, epoxy, carboxyl and carbonyl. The Department of Chemistry offers two placement exams to help students determine which introductory course is the best one for them. The background spectrum was obtained by observing a water droplet on the diamond ATR surface. 3.2.3. Fourier-transform infrared spectroscopy (FTIR) is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas. The background spectrum was obtained by observing a water droplet on the diamond ATR surface. Optical rotations were recorded on a Perkin-Elmer Model-343 digital polarimeter (PerkinElmer. Easy to use, powerful, compact and robust Spectrum Two is the FT-IR spectrometer of choice for everyone, everywhere. Fourier-transform infrared spectroscopy (FTIR) is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas. Danbury, CT 06810) DuraScope single reflection diamond ATR. About 0.5 g of flours were mounted on the instrument and analysed, and the samples spectra were obtained. FTIR. An FTIR spectrometer simultaneously collects high-resolution spectral data over a wide spectral range. on a Thermo Fisher FTIR 200 spectrophotometer. Easy to use, powerful, compact and robust Spectrum Two is the FT-IR spectrometer of choice for everyone, everywhere. See Choosing Intro Courses for descriptions of the introductory The equipment ran 32 scans for each spectrum collected . Go To: Top, References, Notes Data compiled by: Coblentz Society, Inc. GAS (70 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH II) FROM HARD COPY; 2 cm-1 resolution; SOLUTION (10% IN CCl4 FOR 3800-1300, 10% IN CS2 FOR 1300-625, AND 10% IN CCl4 All eight digit numbers are PerkinElmer part numbers unless stated otherwise. This confers a significant advantage over a dispersive spectrometer, which measures intensity over a narrow The samples were mixed with standard KBr for FTIR measurements from 4000 to 400 cm 1 with a resolution of 4 cm 1 (FTIR-8400 S Shimadzu, Milton Keynes, UK). The recycled NMPCB powders were characterized by Fourier transform infrared (FTIR) spectroscopy (Perkin Elmer Spectrum One) to identify the functional groups and to confirm the surface modification of the recycled NMPCB powder. Fourier-transform infrared spectroscopy (FTIR) is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas. PERKIN-ELMER 521 (GRATING) Instrument parameters: FILTERS AT 3150, 2500, 2000, 1150, 700, 410 AND GRATING CHANGES AT 2000, 630 CM-1: Path length: 0.011, 0.011, AND 0.020 CM (CsBr CELL) Resolution: 4: Sampling procedure: TRANSMISSION: Data processing: DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS) The FTIR spectrum for the BDIPADC crystal was traced on a Perkin Elmer RXI FTIR spectrophotometer using the KBr pellet technique in the wave-number range from 400 to 4000 cm 1. The ATR-FTIR spectra of CNT/NF-MA, CNT, CNT/NF and MA are shown in Fig. used to show that you have to press two keys at the same time, for example, ALT+F. Notes, Cautions and Warnings FTIR and XPS signatures were obtained for various oxidation temperatures and compared with those known from the literature about ATR-FTIR Spectroscopy: A Perkin-Elmer (761 Main Ave., Norwalk, CT 06859) Series 1600 Fourier Transform Infrared spectrometer was used equipped with a SourceIR Technologies (15 Great Pasture Rd. The concentration of Ce 4+ after the reaction was measured by ultravioletvisible spectroscopy (Perkin Elmer UV-VIS-NIR Spectrometer) with 316 nm of wavelength. About 0.5 g of flours were mounted on the instrument and analysed, and the samples spectra were obtained. Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here. Fourier-transform infrared (FTIR) spectra (Spectrum One B, Perkin Elmer, USA) were applied to characterize the functional group changes of BSA. Ideally suited to everyday analysis, you can In 1742, Swedish astronomer Anders Celsius (17011744) created a temperature scale that was the reverse of the scale now known as "Celsius": 0 represented the boiling point of water, while 100 represented the freezing point of water. Spectrum 3 Optica IR Optica IR A biorefinery perspective was utilized: the biomass was fractionated using a There are a series of absorption peaks between 3500 cm 1 to 2500 cm 1 , which represent the tensile vibration of the -OH function group of MA eutectic, and the absorption peak at 2925 cm 1 is the telescopic vibration of the -CH group. A biorefinery perspective was utilized: the biomass was fractionated using a Easy to use, powerful, compact and robust Spectrum Two is the FT-IR spectrometer of choice for everyone, everywhere. Fluorescence spectra were recorded in the range of 500 and 800 nm on a LS 50B spectrofluorometer (Perkin Elmer) for solutions with an absorbance at the excitation wavelength lower than 0.1. Most detectors used in dispersive IR spectrometers can be categorized into two classes: thermal detectors and photon detectors. From portable to ultrapowerful, our wide range of FTIR spectrometers provides you the accuracy, reliability, flexibility, and simplicity to meet all your current analysis needs today and expands as your goals evolve. The absorbance spectra were measured using UV/Vis/IR spectrophotometer (Lambda 950, Perkin Elmer, Singapore). on a Thermo Fisher FTIR 200 spectrophotometer. In addition, due to the large agglomerates and contact between the flakes in E-GO sample, current-voltage pattern indicated the E-GO produced higher current flow than A-GO. More information on the manner in which spectra in this collection were collected can be found here. More information on the manner in which spectra in this collection were collected can be found here. The General Chemistry Placement Exam is used for enrollment in CHEM 110, 120, 142 or 143. With fully integrated, robust universal sampling for trouble-free measurements and portability options, Spectrum Two is ideal for use in both laboratory and remote testing environments. In addition, due to the large agglomerates and contact between the flakes in E-GO sample, current-voltage pattern indicated the E-GO produced higher current flow than A-GO. FTIR Analysis. An FTIR spectrometer simultaneously collects high-resolution spectral data over a wide spectral range. As for the interaction between polymer network and organic ionic liquids, the thin film based on ion-dipole interaction had a thermopower of +26.1 mV/K ().In addition, by adjusting the composition of two type polymers, the controllable adjustment of thermopower from 4 mV/K to +14 mV/K was reported for the first time ().Above all, we can see that of the currently The molecular weight distribution of BSA was analyzed by gel chromatography (EcoSEC HLC-8320, TOSOH, China). The FTIR spectrum for the BDIPADC crystal was traced on a Perkin Elmer RXI FTIR spectrophotometer using the KBr pellet technique in the wave-number range from 400 to 4000 cm 1. The molecular weight distribution of BSA was analyzed by gel chromatography (EcoSEC HLC-8320, TOSOH, China). Notice: Most detectors used in dispersive IR spectrometers can be categorized into two classes: thermal detectors and photon detectors. More information on the manner in which spectra in this collection were collected can be found here. Easy to use, powerful, compact and robust Spectrum Two is the FT-IR spectrometer of choice for everyone, everywhere. With over 75 years experience in infrared spectroscopy, we bring deep-seated expertise to a new generation of IR systems. Lignin is an abundant biopolymer, as well as cellulose and hemicellulose. The Honors CHEM 145 Placement Exam is used for enrollment in CHEM 145. The term instrument refers to either the Spectrum 100 FT-IR or Spectrum 100N FT-NIR spectrometer, and any sampling accessory fitted. There are a series of absorption peaks between 3500 cm 1 to 2500 cm 1 , which represent the tensile vibration of the -OH function group of MA eutectic, and the absorption peak at 2925 cm 1 is the telescopic vibration of the -CH group. Ideally suited to everyday analysis, you can The absorbance spectra were measured using UV/Vis/IR spectrophotometer (Lambda 950, Perkin Elmer, Singapore). There are a series of absorption peaks between 3500 cm 1 to 2500 cm 1 , which represent the tensile vibration of the -OH function group of MA eutectic, and the absorption peak at 2925 cm 1 is the telescopic vibration of the -CH group. The FTIR analysis of the synthesized Fe 2 O 3-NPs detected an outcome in the range of wavenumber 400-4000 cm-1 that ascertained the chemical bonds as well as functional groups (Figure 4).The FTIR spectrum of the synthesized Fe 2 O 3-NPs exhibited defined peaks at 517, 621, 1020, 1612, and 3435 cm 1.The appearance of two well IR Spectrum. Fluorescence spectra were recorded in the range of 500 and 800 nm on a LS 50B spectrofluorometer (Perkin Elmer) for solutions with an absorbance at the excitation wavelength lower than 0.1. See Choosing Intro Courses for descriptions of the introductory Sawdust—a lignocellulosic waste generated in large amounts in sawmills—to evaluate its antioxidant capacity. With fully integrated, robust universal sampling for trouble-free measurements and portability options, Spectrum Two is ideal for use in both laboratory and remote testing environments. used to show that you have to press two keys at the same time, for example, ALT+F. An FTIR spectrometer Nicolet 8700 (Thermo Scientific, Inc., Santa Clara, CA, USA) was used to analyse FM flours, with wavelengths ranging from 400 to 4000 cm 1. Lignin is an abundant biopolymer, as well as cellulose and hemicellulose. The term instrument refers to either the Spectrum 100 FT-IR or Spectrum 100N FT-NIR spectrometer, and any sampling accessory fitted. The observed band in the FTIR spectrum at 1721 cm 1, 1277, 1000 (Perkin Elmer, USA). FTIR and XPS signatures were obtained for various oxidation temperatures and compared with those known from the literature about The General Chemistry Placement Exam is used for enrollment in CHEM 110, 120, 142 or 143. Thermal detectors include thermocouples, thermistors, and pneumatic Figure 15.3 Schematic diagram of a commercial dispersive IR instrument, the Perkin-Elmer Model 237B Infrared Spectrometer.

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