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Quantification of Humic and Fulvic Acids in Humate Ores, DOC, Humified Materials and Humic Substance-Containing Commercial Products
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Capítulos
- 00:04Introduction
- 00:49Solid Sample Preparation
- 01:41Extraction Procedure: Solid Samples
- 02:36Extraction Procedure: Liquid Samples
- 03:25Nonsoluble Material Removal
- 04:00Humic Acid (HA) Precipitation and Separation
- 05:23Ash Content, Purified HA Percentage, and Original Source Sample Pure HA Concentration Determination
- 06:05Hydrophobic Fulvic Acid (HFA) Purification Column Preparation
- 07:14Hydrophobic FA Isolation
- 08:15HFA De-Ashing
- 10:33Results: Representative HA and HFA Quantification
- 12:06Conclusion
This method provides a gravimetric quantification of humic substances (e.g., humic and fulvic acids) on an ash-free basis, in dry and liquid materials from soft coals (i.e., oxidized and non-oxidized lignite and sub-bituminous coal), humate ores and shales, peats, composts and commercial fertilizers and soil amendments.
