Related Experiment Video
Updated: May 14, 2026

Improving Infrared Spectroscopy Characterization of Soil Organic Matter with Spectral Subtractions
Published on: January 10, 2019
[Effect of spectra correction on the fluorescence characteristics of dissolved organic matter]
Hua-Yong Wu1, Ze-Yu Zhou, Hong-Tao Wang
1wuhy02@mails.thu.edu.cn
Abstract:
The Excitation-emission matrix (EEM) fluorescence spectra of dissolved organic matter (DOM) are not only dependent on the chemical structure of DOM as well as the local chemical environment around the DOM, but also dependent on the instrument employed for the analysis. Thus, in order to get the real spectra of the DOM, spectra correction of the effect of the instrument-specific response is necessary. However, some studies corrected DOM spectra, while still some studies didn't, leading to inconformity when comparing the data and the results from different groups. The present work evaluated the effect of spectra correction on the fluorescence characteristics of DOM. The results demonstrated that DOM spectra differed significantly after correction. Fluorescence intensities showed a decrease in the range of Ex/Em = 220-450/250-500 nm, while an increase at Em < 250 nm after correction. Fluorescence intensity ratio (FI) and humification index (HIX) derived from peak picking method showed a decrease after correction, while biological index (BIX) increased slightly. P(I), n, P(II), n and P(III), n derived from FRI analysis exhibited a significant increase, while P(IV), n and P(V), n decreased. The results suggest that spectral correction should be included when analyzing the properties and trends of the DOM using EEM.
More Related Videos
Related Concept Videos
Variables Affecting Phosphorescence and Fluorescence
Spectrophotometry: Introduction
The essential components of a spectrophotometer include a source of electromagnetic radiation, a slot for placing a material to be analyzed, and a...
UV–Vis Spectroscopy of Conjugated Systems
One of the factors influencing λmax is the extent of conjugation in the...
Molecular Spectroscopy: Absorption and Emission
UV–Vis Spectroscopy: Molecular Electronic Transitions
Spectroscopy of Carboxylic Acid Derivatives
In the...

