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Preconcentration of Cd(II) and Pb(II) using humic substances and flow systems coupled to flame atomic absorption spectrometry
(Springer WienViennaAustria, 2004)
The Effect of Humic Substances and Phosphate Fertilizer on Growth and Nutrient Uptake of the Potato
(2020-06-16)
The use of applied phosphorus (P) and the uptake of nutrients from the soil by plants can be improved when the fertilizer is combined with the application of humic substances (HS). However, these beneficial effects are ...
Multiresidue analysis of pesticides in water from rice cultures by on-line solid phase extraction followed by LC-DAD
(Gordon Breach Sci Publ Ltd, 1998-01-01)
An automated on-line solid phase extraction procedure followed by liquid chromatography with diode array detection was investigated for the determination of different classes of pesticides in water samples containing varied ...
Multiresidue analysis of pesticides in water from rice cultures by on-line solid phase extraction followed by LC-DAD
(Gordon Breach Sci Publ Ltd, 1998-01-01)
An automated on-line solid phase extraction procedure followed by liquid chromatography with diode array detection was investigated for the determination of different classes of pesticides in water samples containing varied ...
Water-soluble humic acid quantification using a flow-injection system with and without sample pretreatment
(American Chemical Society, 2013-08)
Two automated methods for the determination of humic acids (HAs) in natural water samples are presented. Flow injection systems were developed based on the formation of a complex between humic acids and toluidine blue dye. ...
Thermodynamic characterization of humic acid-surfactant interaction: New insights into the characteristics and structure of humic acids
(Revista Brasileira de Ciência do Solo, 2017)
EVOLUTION PATTERNS OF THE SOIL ORGANIC-MATTER IN SOME AGRICULTURAL SYSTEMS IN THE BRAZILIAN CERRADO REGION
(Gauthier-villars, 1993-01-01)
Several changes in the soil humus characteristics were observed after clearing the Central Brazil virgin forest. When compared with the original ''Cerrado'' forest, the soils from the agricultural systems showed increased ...
EVOLUTION PATTERNS OF THE SOIL ORGANIC-MATTER IN SOME AGRICULTURAL SYSTEMS IN THE BRAZILIAN CERRADO REGION
(Gauthier-villars, 1993-01-01)
Several changes in the soil humus characteristics were observed after clearing the Central Brazil virgin forest. When compared with the original ''Cerrado'' forest, the soils from the agricultural systems showed increased ...