FT-IR Spectroscopy

Aug 01, 2015
Special Issues
Although handheld FT-IR spectrometers now make it possible to carry out field-based FT-IR analysis of soils at a crime scene, reliable and tested protocols are not yet available for such work. Here, we discuss sampling options and describe tests of a methodology that is being eveloped for in situ FT-IR analysis of soil samples.
Aug 01, 2015
Special Issues
Quality control of silicones used in medicinal implants is challenging, and traditional methods waste a lot of raw material. In this study, NIR spectroscopy has been used to replace the traditional rheometric measurements, with excellent results. The NIR method enables improved quality control and a more economical process.
Aug 01, 2015
Special Issues
Infrared multiple angle incidence resolution spectroscopy (IR MAIRS) provides a powerful new tool to determine the molecular structure and orientation in a thin film on an IR-transparent substrate. The MAIRS technique replaces a tedious, and sometimes impossible, combination of sample preparation and analysis of identical films on both transparent and reflective substrates.
Jul 01, 2015
Spectroscopy
Five tried-and-true techniques for dealing with the IR spectral interpretation of mixtures. And check out the results of the recent quiz — and take the new one!
Apr 01, 2015
Spectroscopy
Interpreting infrared spectra is fun, but to do it properly one must be grounded in theory, which might be not so enjoyable for some.
Jan 01, 2015
Spectroscopy
There is a continuing need for Fourier transform infrared (FT-IR) users to receive training in how to interpret the infrared spectra they measure. This new column will provide practical advice about how to do this. This first installment will present why this type of column is important, discuss some basic IR theory, and lay out a blueprint for future installments.
Oct 01, 2014
Spectroscopy
Macro attenuated total reflection FT-IR spectroscopic imaging is a powerful and underutilized tool. This article presents an overview of approaches and opportunities for using this method to study dynamic processes such as diffusion, sorption, crystallization, and dissolution.
Aug 01, 2014
Special Issues
Resonance-enhanced atomic force microscopy (AFM)–infrared (IR) is a new technique that couples an atomic force microscope with a pulsed tunable IR laser source to provide high spatial resolution chemical analysis of samples as thin as a monolayer. The AFM probe tip acts as a small local detector of the thermal expansion of the sample caused by the absorption of the monochromatic IR radiation.
Aug 01, 2014
Special Issues
The mechanical properties of polymer films such as tensile strength and resistance to tearing depend strongly on the orientation of the polymer chains. Fourier transform infrared (FT-IR) spectroscopy can be used to measure the degree of orientation both within the plane of the film and normal to it.
Aug 01, 2014
Special Issues
Counterfeit and illicit tobacco may contain potentially toxic organic impurities that result in adverse health effects to the consumer. The aim of this work was to investigate the feasibility of the identification of organic impurities in counterfeit or illicit tobacco using attenuated total reflectance-Fourier transform infrared (ATR-FT-IR) spectroscopy.
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