humic substance

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Noun1.humic substance - an organic residue of decaying organic matter
organic compound - any compound of carbon and another element or a radical
fulvic acid - a yellow to yellow-brown humic substance that is soluble in water under all pH conditions; "they measured the fluvial fulvic acid"
humic acid - a dark brown humic substance that is soluble in water only at pH values greater than 2; "the half-life of humic acid is measured in centuries"
humin - a black humic substance that is not soluble in water
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References in periodicals archive
The binding sites for Cu, Cd, and Pb are strongly related to the humic substance content of extracellular polymers (ECP) in activated sludge (Guibaud et al., 2003).
FTIR--a didactic approach for the study of humic acid-chromium chelation during the environmental remediation
(ii) To evaluate humic substance chemical composition using solid state [sup.13]C-NMR
Humification and Humic Acid Composition of Suspended Soil in Oligotrophous Environments in South Vietnam
Sirajuddin of National Centre of Excellence in Analytical Chemistry will deliver keynote addresses at the 4thA International KOP Regional Development Symposium onA October 21 to 23, 2016A and at 3rdA National Humic Substance Congress with international participation from November 3 to 5, 2016A respectively.
Pakistani professors invited as keynote speakers at a global symposium
It has been successfully applied to the analysis of Suwannee River humic acid (7) and led to the assignment of thousands of empirical formulas for the HA standard obtained from the International Humic Substance Society located at the Georgia Institute of Technology (Atlanta, GA).
Analysis of ulmic acid by mass spectrometry
The water samples were analyzed for pH by meter and humic substance content estimated by UV light absorption at 297 mm (15) using a Shimatzu UV-16 spectrophotometer.
EFFECT OF HUMIC ACID ON LEACHING OF CCA FROM TREATED WOOD
Abril A, Merlo C, Noe L (2013) Realistic soil C sink estimate in dry forests of western Argentina based on humic substance content.
Long-term effects of wheat production management practices on some carbon fractions of a semiarid Plinthustalfs
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