Infrared (IR) Spectroscopy

Jun 01, 2011
Spectroscopy
By Spectroscopy Editors
Algae and other aquatic species are promising sources for biomass that can be economically converted into fuel, and several infrared sampling techniques can be used to analyze these samples.
May 01, 2011
Spectroscopy
In the last four columns we described the theory of what should happen when we perform classical least squares calculations on mixtures when Beer's law applies. In this column we take our first look at what actually does happen.
Apr 01, 2011
Special Issues
By Spectroscopy Editors
A review of recent developments in MIR spectroscopy that have potential for field deployment in defense and homeland security applications for standoff detection of highly energetic materials (HEM) and homemade explosives (HME), as well as in forensic sciences applications.
Apr 01, 2011
Special Issues
By Spectroscopy Editors
Combining multiple sensors into one instrument increases the probability of detecting explosive residues and enables the detection of a greater number of explosives.
Apr 01, 2011
Spectroscopy
By Spectroscopy Editors
The wavelet packet transform (WPT) combined with the modified uninformative variable elimination (MUVE) method (WPT–MUVE) is proposed to select variables for multivariate calibration of spectral data.
Feb 11, 2011
Application Notebook
By Spectroscopy Editors
FT-IR diffuse reflectance sampling coupled with an environmental temperature chamber offers a convenient method to study sample degradation, to evaluate catalyst efficiency, and to determine reaction pathways as a function of temperature and pressure.
Feb 11, 2011
Application Notebook
By Spectroscopy Editors
Confocal Raman imaging opened the door for many applications in Raman spectroscopy and imaging that were previously unavailable for measurement with conventional (non-confocal) Raman methods. However, high confocality always results in a high focus sensitivity and this can make measurements difficult with rough or inclined samples.
Feb 11, 2011
Application Notebook
By Spectroscopy Editors
Infrared analysis of seized drugs is underutilized in many forensic laboratories owing to the ambiguous results produced by samples containing a mixture of compounds. The use of a patented multi-component search algorithm can help overcome the limitations of infrared for the identification of drugs in mixture samples.
Feb 11, 2011
Application Notebook
By Spectroscopy Editors
Near-infrared spectroscopy (NIRS) is a powerful technique for rapid and nondestructive material analysis. Scientific breakthroughs over the past several decades have made NIRS one of the most powerful tools for research, especially in industries such as food and drug, chemical, oil and gas, and plastics. This technique has mainly been limited to nonportable applications due to instrument size, fragility, and cost.
Feb 11, 2011
Spectroscopy
The connection between the mathematics of classical least squares and the graphical displays used to present it is examined in further detail.
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