Near infrared or NIR is electromagnetic radiation of longer wave lengths than visible light, but shorter than full infrared. Spectroscopy, which refers to the interaction between matter and radiated energy, is one of the most common applications of NIR. A high-quality near infrared spectrophotometer is primarily used as an evaluation tool for different materials.
NIR spectroscopy involves bouncing an NIR beam off a sample, and then dispersing the emitted beam with a prism to separate the light according to its composite wavelengths. Analysis of such spectrum allows technicians or scientists to record such findings to evaluate the sample. The entire process can be performed without compromising the samples used.
As NIR technology is less invasive, it requires little to no preparation of samples, even as the results are impressively accurate. An NIR spectrophotometer has several applications in a wide array of industries. In the food industry for instance, it can be used to determine the sweetness of fruits by evaluating the light transmitted from the sample without destroying it.
In pharmaceutical applications, a near infrared system is used to provide accurate measurements of external as well as the overall contents of samples. A reliable near infrared reflectance procedure is used to analyze the exterior layers of coated or cored tablets. It can also be adjusted to transmission mode to measure the dosage of the samples. NIR technology is also used as an eco-friendly tool, particularly in the textile industry.
3.5 million tons of carpet and rugs are reportedly disposed of in the United States each year. Carpet recycling is an effective solution employed by the textile industry to repurpose these old carpets. NIR technology is used to identify different kinds of fibers such as cotton or merchandized cotton, acrylic or modified acrylic, acetate, triacetate and many more. Once the fibers have been identified, the material can be used appropriately for carpet recycling.
Aside from such production applications, NIR is also used in research and development. NIR spectroscopy is used to measure blend uniformity, moisture content, and particles sizes of granules in research facilities. If you want to learn more about NIR technology, you can log on to wisegeek.com/what-is-near-infrared-spectroscopy.htm and biosupport.licor.com/docs/AppNote_OliveRev.pdf.
Useful Applications of a Near Infrared Spectrophotometer