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.
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.
Aug 01, 2014
Special Issues
Law enforcement relies upon "schedules" or lists of controlled substances. In an attempt to circumvent the law, clandestine laboratories produce synthetic designer drugs that are chemically related to a controlled substance, but are different enough to raise legal issues with prosecution.
Jan 21, 2014
Wavelength
By Spectroscopy Editors
Everyone loves a list, and the editors of Spectroscopy are no exception! In 2013, Spectroscopy covered a wide array of topics throughout the year to bring you the most relevant information for your work, on topics ranging from selecting the right ICP-MS system to deciding which Raman technique is right for you, from our annual salary survey to calibration transfer. Here is a list of 13 popular articles and columns from 2013
Oct 15, 2013
Wavelength
By Spectroscopy Editors
Fourier transform infrared (FT-IR) spectroscopy has been used to identify unknown materials, determine the quality or consistency of a sample, and determine the amount of components in a mixture. Gary Small, of the Department of Chemistry and Optical Science and Technology Center at the University of Iowa, spoke to Spectroscopy about his work using passive FT-IR remote sensing measurements.