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Fourier transform infrared spectroscopy and imaging of dragonfly, damselfly and cicada wing membranes
Mark Tobin and colleagues describe “Fourier transform infrared spectroscopy and imaging of dragonfly, damselfly and cicada wing membranes”. Insects and plants have evolved highly specialised surfaces such as being highly water repellent or superhydrophobic, which also confers self cleaning properties. This is of interest to materials scientists to help in the development of manufactured materials with similar properties. High spatial resolution FT-IR spectroscopy and imaging provide useful information about the complex chemical patterning that contributes to this functionality.
A new technique combines electron microscopy and synchrotron x-rays at Brookhaven Lab to track chemical reactions under real operating conditions.
Karsten Hinrichs and Andreas Furchner describe “Infrared mapping spectroscopic ellipsometry”. Recent developments in fundamental and materials research have increased the value of mapping techniques such as ellipsometry. IR ellipsometry, since it operates in the mid-IR fingerprint region, provides complementary information on composition, structural properties and interactions
Monitoring of catalytic reactions and catalyst preparation processes in liquid phase systems by combined in situ spectroscopic methods
In situ spectroscopic methods such as infrared, Raman and UV/vis spectroscopy are powerful tools to gain insight into reaction mechanisms and catalyst actions in homogeneously catalysed reactions. These methods and combinations of them offer great potential for the real-time monitoring of reactions in the liquid phase, for mechanistic studies as well as process control and kinetics.
Custom/OEM FT-IR engine based on the IRD 3 (an established, dedicated vapour-phase GC-IR detector). Versions are available with spectral ranges of 8000–400 cm–1 (with standard KBr beamsplitter), 6000–600 cm–1 (with optional ZnSe beamsplitter) and 12,000–1800 cm–1 (optional CaF2 beamsplitter). Resolution is 2 cm–1. Can be supplied sealed and desiccated or nitrogen purged.
ATR Pro One
Single-reflection ATR accessory using a newly designed monolithic diamond crystal to provide much higher throughput. A “torque limiter” pressure applicator ensures reproducible sample pressures. A high-throughput model is optimised for mid-IR measurements and a broadband model for use into the far-IR. ZnSE or Ge crystal kits are available.
Spotlight FT-IR Microscope Systems
Offering automated setup and complete characterisation in a short time for a wide range of applications. Available with either the Spectrum Two or Frontier FT-IR spectrometers.
Super-Sealed Liquid Flow Cell
For continuous flow IR transmission applications with a large port diameter permitting high flow rates. Designed for optimised laminar flow. Available with customer’s selection of sampling pathlength and window materials.
FT-IR ISO/IEC 17025 Wavelength Reference
Polystyrene film reference certified under ISO/IEC 17025 and traceable to NIST SRM 1921b for those in regulated industries and who need to comply with USP Chapters 854 and 1854. The references are card-mounted films and are supplied with a Certificate of Calibration listing wavenumber values for 14 peaks from 539 cm–1 to 3082 cm–1. They are available in two thicknesses: 38 µm for mid-IR and 65 µm with some additional peaks in the NIR.
Hand-held spectrometer that combines both FT-IR and Raman spectroscopies in a single instrument. Libraries are included to enable operators to identify unknowns ranging from explosives and chemical warfare agents to industrial chemicals and precursors. Switching between the two techniques is quick and is done via either the keypad or touchscreen. A motorised anvil adjusts sample pressure based on user settings for FT-IR analysis. Built-in safety features including a scan delay also increase protection from potentially hazardous substances.link.spectroscopyeurope.com/27-02-061
Thin Film Production of Plastic/Polymer Materials Using the Mini-Film Maker Accessory P/N GS03970 – Application Note 43
IR spectroscopy is a useful tool for group chemical species identification of a wide variety of sample materials, particularly for the classification of “organic” chemical materials based upon carbon atoms being present in the molecular structure. Many plastic and polymeric type samples which can be included in the category of organic molecular materials can be classified into particular “family” groupings and it is possible to identify the sample family types both qualitatively and quantitatively by use of the Attenuated Total Reflectance (ATR) technique as an IR measurement. (See - Specac Application Note 42).
IR spectroscopy is a useful tool for group chemical species identification of a wide variety of sample materials, particularly for the classification of “organic” chemical materials based upon carbon atoms being present in the molecular structure. Many plastic and polymeric type samples which can be included in the category of organic molecular materials can be classified into particular “family” groupings and it is possible to identify the sample family types both qualitatively and quantitatively by use of the Attenuated Total Reflectance (ATR) technique as an IR measurement.
Thermo Scientific introduses its OMNIC Picta software which enables users to quickly locate and identify targeted materials
Pike Technologies has introduced high-performance, long-path IR gas cells for analysis of air contaminants, pure gases and gas mixtures.
The 1.3-m focal length McPherson Model 209 spectrometer with new micro-step drive can make wavelength steps as small as 0.1 pm.
The Thermo Scientific Smart iTX uses a monolithic diamond, and has an improved optical design that maximises performance.
The GladiATR accessory from Pike Technologies may now be configured for heating up to 300°C.
Pike Technologies has introduced their next generation of integrating spheres for FT-IR spectrometers, IntegratIR.
Shedding light on plant biology by Fourier transform infrared spectroscopy of pollen” by Boris Zimmermann and Achim Kohler. Currently, pollen identification is mostly done under a light microscope. FT-IR spectroscopy of pollen grains provides rapid and simple identification of pollen, with the added benefit of providing environmental information.
Now available with the new wide range MIR-FIR DLaTGS detector and the recently introduced wide range MIR-FIR beamsplitter. This provides data collection from 6000 cm–1 to 10 cm–1 in one step for all types of transmittance, reflectance and ATR measurements without the need for any beamsplitter or detector exchange.
Universal Forward Looking Reflectance Accessory
This new accessory for the Alpha FT-IR spectrometer allows for the rapid IR characterisation of almost any large or oddly shaped sample or object. The sample is placed in front of the spectrometer with accessory and a spectrum collected.
Compact research-grade FT-IR spectrometer replacing the Tensor 27/37. Uses a diode laser with a longer hold time than HeNe lasers. The IR source is electronically stabilised for longer exposure times. For regulated industries, fully-automated test routines for OQ and PQ are available as well as 21 CFR Part 11 compliant software.
Compact spectrometer for atmospheric measurements by solar absorption spectroscopy. The CAMTracker camera-based feedback system follows the light automatically as the light source. It is portable and can operate for long periods in remote areas with little infrastructure.
Infrared microscope using a quantum cascade laser providing spectral coverage over the entire mid-IR fingerprint region designed for spectral imaging of biomedical and materials research samples. Has two IR and one visible objectives, transmission and reflection modes, a fully automated stage and instrument control and data display via an Ethernet connection to a PC.
Multiple reflection ATR for measurement of analytes at very low concentrations, to 0.5 mg mL–1 or less and volumes down to 10 µL. Both the 10-reflection diamond and 11-reflection Si configurations are compatible with nearly all FT-IR spectrometers and are enclosed for rapid purge. It is now available with trough-style and flow-through liquid cells for operation up to 200°C.
International Crystal Laboratories
Gas Cells for Small FT-IRs
ICL have created special optical interfaces for small-size FT-IR spectrometers for gas analysis. These instruments require adaptations to accommodate large accessories such as long-path gas cells. The interfaces enable use with small FT-IRs such as Bruker’s Alpha, Thermo’s iS5 and PerkinElmer’s Spectrum Two.
Portable Mid-IR ATR Spectrometers
Hand-held, battery-powered spectrometers with no moving parts. An ATR crystal is fixed into the casing. Can be configured for analysis of liquids, slurries or solids. Sphinx software has modules for chemometrics, automation, prediction and a stand-alone mode where the module runs independently of a host computer.
Mid-range FT-IR spectrometer with 60,000 : 1 signal-to-noise ratio. Can analyse small samples, from 1 mm to 10 µm. The previous model, the IRPrestige-21 recorded spectra every 5 s; the IRTRacer-100 can obtain 20 spectra per second in the optional rapid scan mode. The LabSolutions IR software connects to other laboratory hardware, such as LC and GC systems, and unifies management of the measured data. The number of spectra in the standard IR libraries has been expanded from 1000 to 12,000.
Portable FT-IR spectrometer for illicit drug analysis with a library of up to 2500 narcotics, precursors, common chemicals and cutting agents, which can easily be expanded with new drug variants. It has been designed for use by personnel of varying skill levels and requires minimal training for operation.
Thermo Fisher Scientific
iD7 ATR Accessory
ATR accessory for the Nicolet iS5 FT-IR spectrometer with a high-performance monolithic diamond. Optional zinc selenide or germanium crystals in easily swappable plates.
Isotope ratio infrared spectrometer for the continuous measurement of isotope ratios from CO2 in ambient air. Can be used in the field providing the ability to collect data continuously. Uses laser-based mid-IR spectroscopy to measure simultaneously 13C and 18O with a precision better than 0.1 ppt in minutes. Wide concentration range from 200 ppm to 100%.
“Spectral database for postage stamps by means of FT-IR spectroscopy” by Eleonora Imperio, Gabriele Giancane and Ludovico Valli will be of great interest. As well as helping to detect forgeries, FT-IR has been used to create a database which also charts the history of the technology used to create stamps. Quite rightly, they are considered by many to be works of art.
From lake ecology to biofuels—applications of Fourier transform infrared spectroscopy to algal research
“From lake ecology to biofuels—applications of Fourier transform infrared spectroscopy to algal research” is the topic of Andrew Dean, Jon Pittman and David Sigee. Algae are essential for our continued live on Earth, and FT-IR spectroscopy can increase our understanding of their physiology and biotech potential.
Report on the The Seventh International Conference of Advanced Vibrational Spectroscopy (ICAVS-7) held in Kobe, Japan.
This article describes an application of spectral imaging for the differentiation of tumour and normal cells. The authors also introduce the concept of a spectral barcode, which has had success with some tissues and has potential in others.
Single particle characterisation in biologics: from mid-infrared micro-spectroscopy and mapping to spectral imaging
The presence of “particles” in protein pharmaceuticals (biologics) can cause severe, unwanted effects in the drug. The article describes the use of mid-infrared micro-spectroscopy for the investigation and chemical characterisation of single particles in these biologics.