Related Experiment Video
Updated: Jul 7, 2026

O-cresol Concentration Online Measurement Based On Near Infrared Spectroscopy Via Partial Least Square Regression
Published on: November 8, 2019
[Survey of the development of near-infrared spectroscopy instruments]
Xiao Qi1, Jian-guo Han, Man-li Li
1Institute of Grassland Science, China Agricultural University, Beijing Major Laboratory, Beijing 100094, China.
Abstract:
The technology of near-infrared spectroscopic analysis goes by the name of "superman" in the field of analytical chemistry. It is one of the most attention-attracting spectroscopic analysis technologies, and is developing rapidly nowadays. The first near-infrared spectroscopy (NIRS) instrument in the world is fifty years old. Although the authors only have a history of twenty years in NIRS instrument manufacturing, the achievements are exciting. The NIRS instruments are developing and emerging endlessly with the advancement of science. Firstly, the survey of the development of NIRS instruments is described in the present article. Secondly, the principles and the characteristics of five types of NIRS instruments are discussed, including interference filters, Fourier transform, acousto-optic tunable filter, and so on. In addition, the primary producers and their popular products are enumerated in the table. Finally, the direction of NIRS instrument development is viewed.
Related Concept Videos
Infrared (IR) Spectroscopy: Overview
Different compounds display unique properties due to their...
Applications of IR Spectroscopy: Overview
IR Spectrometers
IR Spectroscopy: Molecular Vibration Overview
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
Raman Spectroscopy Instrumentation: Overview
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview
The ATR process begins by directing a beam...

