Related Experiment Video
Updated: May 31, 2026

A Multimodal Wide-Field Fourier-Transform Raman Microscope
Published on: December 30, 2025
[The method of principal component interactive validation in multi-region and its application in gas spectrum
Li-Bing Ren1, Hao-Yun Wei, Yan Li
1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China. rlb07@mails.tsinghua.edu.cn
Abstract:
A method of principal component interactive validation in multi-region is presented. Based on the characteristic peaks of target gas the full spectral region is divided into multiple characteristic regions. In succession the principal component analysis around the pure components spectral matrix in divided characteristic regions is applied. Thus the potential components included in target gas are identified according to the main components number according to 99% larger cumulated contribution and the descending sorting of maximum value of pure component spectrums. After that, the characteristic regions of potential components are compared with the ones of target gas one by one. In this way the real components of target gas are confirmed. Because the principal component analysis was applied in multiple characteristic regions, this method can avoid omitted identification. Owning to the matching validation between the characteristic absorption regions of target gas and the ones of pure component gas this method can avoid additional identification. The simulated and the measured spectra both validate the qualitative ability of this method.
Related Concept Videos
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
IR Frequency Region: Fingerprint Region
The...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation
There are three main types of inductively coupled plasma atomic emission spectroscopy (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
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...
Applications of IR Spectroscopy: Overview
