Process analysis of polymers by NIR spectroscopy

Quantitative Analysis of Panax ginseng by FT-NIR Spectroscopy

Near-infrared spectroscopy (NIRS), a rapid and efficient tool, was used to determine the total amount of nine ginsenosides in Panax ginseng. In the study, the regression models were established using multivariate regression methods with the results from conventional chemical analytical methods as reference values. The multivariate regression methods, partial least squares regression (PLSR) and ...

Field detection of CO and CH4 by NIR 2f modulation laser spectroscopy

  A novel compact fiber-coupled NIR system based on a DFB diode laser source is employed as a portable and sensitive gas sensor for trace detection of combustion pollutant molecules. We demonstrate the performance of such an NIR gas sensor by tracing the absorption lines of CO and CH4 using 2f-WMS technique at moderate temperature of T ~ 600°C in the recuperator channel of an industrial furnace...

Pear quality characteristics by Vis / NIR spectroscopy.

Recently, non-destructive techniques such as the Vis / NIR spectroscopy have been used to evaluate the characteristics of maturation and quality of pears. The study aims to validate the readings by the Vis / NIR spectroscopy as a non-destructive way to assess the qualitative characteristics of pear cultivars 'Williams', 'Packams' and 'Carrick', produced according to Brazilian conditions. The ex...

NIR TIME LINE NIR Spectroscopy : Doing

Herschel used thermometers to determine the heating effect of the sun's rays. He observed elevated temperatures " beyond the red. " Birth's classical diffuse reflectance experiment: All bottles contain same size glass particles. Media surrounding particles: (A) air, (B) water and (C) mineral oil. 1666—Newton disperses white light into colors 1668—Mariotte finds heat disappears when glass insert...

Process Control of UV and EB Curing of Acrylates by In-line NIR Reflection Spectroscopy