In IR Spectrometry, light of longer wavelengths which is usually invisible to human eye is used to recognize and name the elements that a certain material is comprised of. In some cases, especially on a crime scene investigation, this method is uses to determine a specific composition of a certain material found by knowing how it responds when there is interaction with light, or the light it produces when exposed to radiation or when it is burned.
In Physics, the universe is filled with small band in the electromagnetic radiation spectrum that results to visible light.The higher end of the spectrum that is used in methods of IR Spectrometry in microwaves is 1mm and down to about 800 nanometers. The molecules have the ability to absorb enough amounts of IR radiation with different wavelengths depending on the type of the material. This process is possible because molecules have the natural capacity of to be intact as it moves even when energy is applied to the sample material.
To further analyze the absorption pattern that is taking place, spectrometers can recognize the compounds and elements that are present in the specified sample of material and can even lead to a conclusion of the whole material. One should be familiar in organic chemistry to operate any instruments for this process as well as to further understand any information that is shown in the result. Organic Chemistry courses in numerous universities incorporates a portion of spectrometry particularly IR spectrometry.
For some laboratory testing, particularly with Innova Tech Labs, their website shows in a simple tutorial and some practical details how Fourier Transformation IR spectrometry process goes, how useful the process is identifying materials that are unknown, residues, fibers, measurement of oxidation levels, curing process of a polymer, and etc.
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