近红外光（Near Infrared，NIR）是介于可见光（ⅥS）和中红外光（MIR）之间的电磁波，按ASTM（美国试验和材料检测协会）定义是指波长在780～2526nm范围内的电磁波，习惯上又将近红外区划分为近红外短波（780~1100nm）和近红外长波（1100~2526nm）两个区域。近红外区域是人们最早发现的非可见光区域。

Near-IR absorption spectrum of dichloromethane showing complicated overlapping overtones of mid IR absorption features.. Near-infrared spectroscopy (NIRS) is a spectroscopic method that uses the near-infrared region of the electromagnetic spectrum (from 780 nm to 2500 nm). [1] Typical applications include medical and physiological diagnostics and research including blood sugar, pulse oximetry ...

近紅外光（Near Infrared，NIR）是介於可見光（ⅥS）和中紅外光（MIR）之間的電磁波，按ASTM（美國試驗和材料檢測協會）定義是指波長在780～2526nm範圍內的電磁波，習慣上又將近紅外區劃分為近紅外短波（780~1100nm）和近紅外長波（1100~2526nm）兩個區域。近紅外區域是人們最早發現的非

2024年1月8日 · Near-infrared and infrared spectroscopy use different spectral ranges of light, which results in a difference of the required sample size, penetration of the light into the sample, and spectral information. Learn why NIR spectroscopy has many advantages over IR with regards to speed and versatility.

NIR spectroscopy or near-infrared spectrophotometry (NIRS) is an absorption spectroscopy method that helps determine the chemical composition of a compound or solution by measuring how much near-infrared radiation the compound or solution absorbs. As the name suggests, NIR spectroscopy operates in the near-infrared electromagnetic spectrum ...

2023年1月23日 · Near-infrared light (NIR) is a type of infrared light that is the closest on the electromagnetic radiation spectrum to human sight. However, since it is further than what we can see, the wavelengths recorded from NIR are just slightly longer, from 0.75 to 1.4 micrometers (µm). Do note that we are referring to the most commonly used division of ...

2023年1月3日 · Near-infrared (NIR) spectroscopy is a powerful analytical technique that has found wide applications in various fields, including chemistry, pharmaceuticals, agriculture, food science, and materials science. It involves the interaction of near-infrared light with matter to obtain valuable information about its molecular composition and structure.

2024年4月4日 · In one recent study, for example, Fourier transform near infrared (FT-NIR) spectroscopy coupled with chemometric techniques to predict nutritional parameters and identify cookie types and cereal composition in a batch of 120 commercially acquired samples (6). The study demonstrates the effectiveness of FT-NIR spectroscopy is a fast, reliable ...

Near Infrared Radiation refers to electromagnetic radiation with wavelengths ranging from 750 to 2500 nm, which is invisible to the naked eye and was first discovered by William Herschel in 1800 as "radiant heat". ... (UV), visible, or near-infrared (NIR) radiation. This photochemical change can be developed into a visible picture. The ...

Near Infrared (NIR) spectroscopy uses light transmission and absorption to measure various constituents in a sample material such as: moisture, starch, protein, fat and oils. NIR can be used to detect these specific elements, understand the concentration of the elements and/or to detect changes in the overall composition. Because NIR penetrates ...