An Introduction to Online NIR Water Measurements in Liquid Samples
2023年11月14日 · The two types (water and glycol) can be distinguished by the large peak near 2100 nm in alcohols, which is a combination of O-H and C-H bond effects, or a unique water …
A Guide to NIR: Understanding NIR spectra | NIR spectra …
2018年7月16日 · Water is the easiest of all components to spot in the NIR spectra, unless your sample is very dry. Water molecules absorb the NIR light more than any other chemical …
Analysis of water in food by near infrared spectroscopy
2003年7月1日 · Water is a strong absorber in the infrared (IR), including the NIR region spectrum, and near infrared spectra of samples with high water contents (>80%) are strongly dominated …
Decoding Water in NIR Spectroscopy - NIRLAB
2024年2月16日 · Known for its strong absorption in the mid-infrared region, water exhibits less sensitivity and specificity in the Near Infrared spectrum. This means that while NIR …
A Word (or Two) About Online NIR Water Measurements in Liquid Samples
The water peak at 1900 nm is about five times as large as its peak at 1430 nm. For example, 1 mAU in the 1900 nm region for n-propanol corresponds to about 20 ppm water for a 1 cm …
The near-infrared (NIR) bands (at about λ 970-1940 nm) are suited to rapid non-destructive water determination [479], all shifting a few nm to longer wavelength (lower frequency) with …
Applying spectral peak area analysis in near-infrared spectroscopy ...
2007年5月9日 · Spectral peak area analysis has been shown to be a viable method in near-infrared spectroscopy moisture assays. The spectral characteristics of the NIR spectra were …
Spectral Analysis in the NIR Spectroscopy | SpringerLink
2020年11月14日 · To calculate accurate difference spectra one must obtain spectra with very high wavelength accuracy. Let us show very simple but important example of the calculation of …
NIR Optics and Measurement Methods | SpringerLink
2020年11月14日 · Further, the absorbance of water can be a good reference for the selection of a cell. Table 9.1 summarizes the relationship between the peak wavelength of water in the NIR …
Perfecting and extending the near-infrared imaging window
2021年9月24日 · The intense absorption peak of water locating in the NIR-II region has been eschewed for its strong signal loss and potential thermal damage.