Related Experiment Video
Updated: Jul 5, 2026

Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic Substance-Containing Commercial Products
Published on: March 18, 2022
Exploring the high-mass components of humic acid by laser desorption ionization mass spectrometry
Gabriela Chilom1, Ovidiu Chilom, James A Rice
1Department of Chemistry & Biochemistry, South Dakota State University, Brookings, SD 57007, USA.
Abstract:
Leonardite and Elliot soil humic acids have been analyzed by laser desorption ionization mass spectrometry (LDI MS) in the m/z 4000-200,000 range. Positive ion mass spectra for each humic acid obtained under optimum conditions showed a broad high-mass distribution between m/z 20,000 and 80,000. The dependence of the mass distribution on instrumental parameters and solution conditions was used to investigate the nature of the high-mass peaks from humic acid spectra. Our data suggests that macromolecular ions and humic acid aggregates have the same probability of occurrence while cluster ion formation has a low probability of occurrence.
More Related Videos
11:00Untargeted Metabolomics from Biological Sources Using Ultraperformance Liquid Chromatography-High Resolution Mass Spectrometry (UPLC-HRMS)
Published on: May 20, 2013
10:47Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization (IR-MALDESI)
Published on: March 24, 2016
Related Concept Videos
High-Resolution Mass Spectrometry (HRMS)
Mass Spectrum: Interpretation
Matrix-Assisted Laser Desorption Ionization (MALDI)
Mass Spectrometry: Complex Analysis
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
MALDI-TOF Mass Spectrometry
Mass Spectrometry: Overview