Spectroscopy & Near Infrared (NIR) Spectroscopy
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Spectroscopy is a technique that uses the interaction of energy with a sample to perform an analysis. Spectroscopy pertains to the dispersion of an object's light into its component colors (i.e. energies). The data that is obtained from spectroscopy is called a spectrum. A spectrum is a plot of the intensity of energy detected versus the wavelength (or mass or momentum or frequency, etc.) of the energy.
A spectrum can be used to obtain information about atomic and molecular energy levels, molecular geometries, chemical bonds, interactions of molecules, and related processes. Often, spectra are used to identify the components of a sample (qualitative analysis). Spectra may also be used to measure the amount of material in a sample (quantitative analysis).
There are several instruments that are used to perform a spectroscopic analysis. In simplest terms, spectroscopy requires an energy source and a device for measuring the change in the energy source after it has interacted with the sample (a spectrophotometer or interferometer).
Types of Spectroscopy
There are as many different types of spectroscopy as there are energy sources
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Near infrared spectroscopy is a spectroscopic method utilizing the near infra-red (NIR) region of the electromagnetic spectrum (from about 1000nm to 2500nm). Common incandescent or quartz halogen light bulbs are most often used as broadband sources of near infrared radiation. In fact light bulbs are the most common radiation sources for the NIR based analytical applications. It is becoming more common to employ LEDs as well. Typical applications include pharmaceutical, food and agrochemical quality control, as well as combustion research. (Source : Wikipedia, the free encyclopedia)
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Training on Spectroscopy |
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