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1 Preparation method of humic acid organic fertilizer
https://patents.google.com/patent/CN101768031B/en
The invention relates to a preparation method of a humic acid organic fertilizer, which comprises the following steps: taking hydrogen peroxide, ...
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2 Method of preparing a humic acid extraction - Justia Patents
https://patents.justia.com/patent/8580979
Another process involves reacting Humic Acids with anhydrous ammonia or aqueous ammonia and applying the resulting material to the flue gas, and ...
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3 Comparison of two methods of preparation of humic and fulvic ...
https://www.tandfonline.com/doi/abs/10.1080/00380768.1992.10416948
The recov- eries of fulvic acids (FAs) by the IHSS method in which XAD-8 was used as adsorbent to obtain only humie substances in the FA fraction from the brown.
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4 Preparation and characterization of humic and fulvic acid ...
https://link.springer.com/article/10.1007/BF02040074
Two fractions of both fulvic acids (FA) and humic acid (HA) were prepared by fractionation method of Pierce and Felbeck5 involving acid hydrolysis of soil ...
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5 Humic Acid Isolations from Lignite by Ion Exchange Method
https://iopscience.iop.org/article/10.1088/1742-6596/953/1/012234/pdf
The humic substances also prepared by alkaline extraction from peat using potassium [7]. Process of extracting HA values from a source thereof which comprises, ...
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6 Identification of extraction methods for the production of humic ...
https://core.ac.uk/download/pdf/37322856.pdf
in compost (i.e. CB1) preparation for mushroom production (“Goodie water ... compared to lignin extraction/humic acid precipitation method (LHAp) and lignin.
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7 Extraction and characterization of humic acid from coal for the ...
https://www.sciencedirect.com/science/article/pii/S2238785417304982
The HA was extracted in a proportion 1:10 (coal:extractor) using a NaOH 0.5 mol L−1 solution, followed by stirring for 3 h. The suspension was allowed to stand ...
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8 What is the procedure to make humic acid? - Quora
https://www.quora.com/What-is-the-procedure-to-make-humic-acid
Humic acid a carbon-rich organic acid that is an excellent soild conditioner and natural chelating agent. To prepare the same, you need to add 1k of NTS ...
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9 Origin and test method of Humic Acid previous and present
https://news.agropages.com/News/NewsDetail---41071.htm
Humic acid has long been believed to be originated from soil, Achard's alkali-based extraction of humic acid from soil is regarded as the ...
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10 Determination of Organic Compounds, Fulvic Acid, Humic ...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8157823/
Humic substances were analyzed according to the recommendations of agricultural chemical analysis [25]. Procedure. In total, 10 g of air-dry ...
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11 Combining humic acid with phosphate fertilizer ... - Nature
https://www.nature.com/articles/s41598-020-74349-6
6. A total of 42.64 parts by weight of potassium hydroxide (GR) was added into the mixture prepared by thoroughly mixing 20 parts by weight of ...
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12 CN 102898254 A - Humic acid synergia compound fertilizer ...
https://insight.rpxcorp.com/patent/cn/CN102898254A
Described humic acids synergy liquid B allows concentration 0.1 ~ 1 % by weight sulfuric acid or salpeter solution mix with Sodium salts humic acids or ...
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13 Humic Acid Labeling Aid
https://www.cdfa.ca.gov/is/ffldrs/pdfs/HumicAcid.pdf
The humic acid guarantee should be based on the CDFA method for determination of humic ... No additional test sample preparation is needed.
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14 ESI-FT-ICR-MS Analysis of Humic and Fulvic Acids
https://pubs.acs.org/doi/10.1021/acs.est.2c01125
Sample Preparation Techniques for Humic Acids (HA). The agricultural soil HA was prepared using five solubilization approaches and was ...
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15 Efficient microwave degradation of humic acids in water using ...
https://hal.archives-ouvertes.fr/hal-02055356/document
micropollutant removal efficiency by oxidant-based methods ... acids was prepared by dissolving 1 g humic acids and 4 g.
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16 Extraction of Humic Acid from Lignite by KOH-Hydrothermal ...
https://www.researchgate.net/publication/332149506_Extraction_of_Humic_Acid_from_Lignite_by_KOH-Hydrothermal_Method
Humic acid (HA) was extracted by a hydrothermal method from Huolinhe lignite from Inner Mongolia. The effects of the alkali-to-carbon mass ...
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17 METHOD FOR THE PRODUCTION OF HUMIC ACIDS ...
https://www.freepatentsonline.com/3674649.html
Process for the preparation of humic acids and salts thereof by successive steps of fermentation of garbage and agricultural byproducts, ...
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18 humic acid water-soluble fertilizer and preparation method ...
https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2018112868
The fertilizer comprises the following ingredients in parts by weight: 25-36 parts of humic acid, 11-20 parts of urea, 5-10 parts of dipotassium phosphate, 5-12 ...
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19 Extraction of Humic Acid from Lignite by KOH-Hydrothermal ...
https://www.mdpi.com/2076-3417/9/7/1356/htm
Humic acid (HA) was extracted by a hydrothermal method from Huolinhe lignite from Inner Mongolia. The effects of the alkali-to-carbon mass ...
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20 Humic substance - Wikipedia
https://en.wikipedia.org/wiki/Humic_substance
FractionationEdit · The humic and fulvic acids are extracted as a colloidal sol from soil and other solid phase sources into a strongly basic aqueous solution of ...
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21 Determination of Humic Acid and Fulvic Acid by ...
https://journals.resaim.com/ijramt/article/download/1549/1492/2081
Humic acid determination after its extraction by Sodium ... Procedure: Prepared the standard solution as per method and.
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22 An improved method to extract RNA from soil with efficient ...
https://sfamjournals.onlinelibrary.wiley.com/doi/full/10.1111/j.1365-2672.2009.04298.x
Method 1 (using a mixture of humic and fulvic acids as standard): The humic and fulvic acid fractions prepared from the field soil were adjusted ...
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23 What Is Humic Acid? Where Does It Come From? - SoilBiotics
https://soilbiotics.com/files/Humic_Acid_Explained.pdf
Humic and Fulvic acids are the final break-down constituents of the natural ... These strata were not very deep which allowed for simple mining techniques.
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24 Humic and fulvic acid extraction method and characterization ...
https://www.scielo.org.mx/scielo.php?pid=S2007-09342014001001397&script=sci_arttext&tlng=en
The solution was heated to 70°C and centrifuged at 8000 rpm for 30 min. Humic acids precipitate, while fulvic acids remain in solution. The FA extraction was ...
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25 An optimized extraction method to remove humic acids ...
https://www.osti.gov/pages/servlets/purl/1408036
method to improve microbial proteome measurement by removing the soil-borne humic substances co-. 36 extraction from soils. Our approach employs an in-situ ...
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26 Synthesis of a humic acid-silica gel as a low cost adsorbent for ...
https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/67162/1/Erik_prasetyo.pdf
simplification in humic acid-silica gel adsorbent synthesis, which employed single pot sol-gel method. The characterization results confirm the success in ...
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27 Extraction And Purification Of Humic Acid From Leonardite As ...
https://commons.und.edu/cgi/viewcontent.cgi?article=3448&context=theses
2.5.1 Typical methods of Incorporating Graphene into Lithium-Ion Batteries ..25. 2.5.2 In-Situ Synthesis of Graphene from Humic Acid .
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28 CN103073364A - Long-acting humic acid compound fertilizer ...
https://www.google.com/patents/CN103073364A?cl=en
The invention discloses long-acting humic acid compound fertilizer, which is prepared by the following raw materials: 260 parts of 98% of concentrated ...
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29 Extraction and Characterization of Humic and Fulvic Acids ...
https://scialert.net/fulltext/?doi=ajes.2010.130.135
Humic substances promote plant growth and improve the organic matter status of soil and soil fertility. The common method of extracting of humic substances is ...
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30 New Standardized Method for Quantification of Humic and ...
https://academic.oup.com/jaoac/article/97/3/721/5654784
The methods used for preparation of HA and FA were adapted according to the guidelines of the International Humic Substances Society ...
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31 An acidic-groups detection method and its application ... - PLOS
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0238061
Preparation of humic-acid sample. 10 g of sodium humate was weighed into 100 mL of 12 mol/L hydrochloric acid, stirred well, and then slowly ...
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32 METHOD FOR COMPREHENSIVELY PROCESSING BROWN ...
https://www.mysciencework.com/patent/show/method-comprehensively-processing-brown-coal-leonardite-humic-fertilizers-preparations-fuel-briquettes-EP3135655A1
An American inventive solution also relevant to fulvic preparation recovery ... The method of humic acid separation consists in the use of raw oxidized coal ...
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33 Comparison of two methods of preparation ... - Semantic Scholar
https://www.semanticscholar.org/paper/Comparison-of-two-methods-of-preparation-of-humic-Kuwatsuka-Watanabe/2864c3985495800c67627c176924dccd6d212d65
Abstract Two methods for preparing soil humus samples, NAGOYA (Nagoya University) method and IHSS (International Humic Substances Society) ...
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34 DIY Liquid Humic Acid Recipe - Nutri-Tech Solutions
https://www.nutri-tech.com.au/downloads/diy-liquid-humic-acid-recipe.pdf
Humic acid is a carbon-rich organic acid derived from humates. It is an excellent soil conditioner, beneficial fungal promotant, and natural chelating.
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35 Extraction of Humic Acid from Agricultural Crop Residues ...
https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajpc.20211004.15.pdf
secondary synthesis reaction during the decay process and by ... Humic acid heterogeneity is favoured by method used to.
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36 ISO 19822:2018(en), Fertilizers and soil conditioners
https://www.iso.org/obp/ui/#!iso:std:66271:en
The classical method of extracting humic acids and fulvic acids from soil humus utilize a “strong base” to extract the alkaline soluble materials, and then the ...
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37 Humic Acid - Manufacturing Process, Technology ...
https://www.primaryinfo.com/agro-chemicals/humic-acid.htm
Humic acid is a group of organic compounds formed by the association of high-molecular mass · Coal is ground and filtered through 60 mesh sieve. · Humic acid ...
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38 A New Standardized Method for Quantification of Humic and ...
https://trs.com.ph/wp-content/uploads/2021/08/fulvic-measurement-standards.pdf
reliable method to quantify humic acid (HA) and fulvic acid (FA) in raw ores and products ... preparing their Standard and Reference samples (1, 2) that was.
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39 Extraction and characterization of humic acid from ...
https://www.phytojournal.com/archives/2018/vol7issue6/PartJ/7-6-5-487.pdf
vermicompost and FYM by following standard alkaline extraction method. Extracted humic acid was subjected to characterization by analyzing ...
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40 Humic Acid and How it Benefits Soil | EcoFarming Daily
https://www.ecofarmingdaily.com/build-soil/humus/humic-acid/
Humus vs. Organic Matter · Fulvic acid: a yellow to yellow-brown humic substance that is soluble in water under all pH conditions and is of low molecular weight.
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41 ANALYTICAL STUDY OF HUMIC ACID FROM VARIOUS ...
https://www.witpress.com/Secure/ejournals/papers/D&NE040105f.pdf
Granular structure and elemental analysis of samples were obtained using SEM/EDS (JEOL. JSM-6360A, Japan) techniques. Each sample was prepared on the glass ...
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42 Production of acid soluble humates - EP 0786490 A2
https://patentimages.storage.googleapis.com/39/2d/d3/55a98a9e662c74/EP0786490A2.pdf
These traditional methods for producing humic acids from humic acid bearing ores involve extraction with alkali. 15 An example of such an extraction process is ...
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43 Humic acid-assisted synthesis of stable copper nanoparticles ...
https://pubs.rsc.org/en/content/articlelanding/2015/tb/c5tb00684h
In this report, stable copper nanoparticles (Cu NPs) were prepared through a facile annealing process using humic acid as the reducing and stabilizing ...
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44 Extraction and Chemical Characterization of Humic Acid from ...
https://mdpi-res.com/d_attachment/sustainability/sustainability-13-08969/article_deploy/sustainability-13-08969-v4.pdf?version=1629793418
organic polymer that is created through secondary synthesis ... The method for extracting humic acid using NaOH was modified from [18]. The.
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45 Effects of different activation processes of humic acids on the ...
https://aip.scitation.org/doi/10.1063/1.5110815
Extract Humic acid from lignite in different method get different Humic acid. In this study we preparation of Humic acid by alkali-soluble ...
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46 Preparation of Nitrosulfonated Humic Acid-based Ion ...
https://www.researchsquare.com/article/rs-589502/v1.pdf
The general method for preparing ion imprinted polymers is to first ... Humic acid is an environmentally friendly natural polymer with a ...
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47 Method and importance of obtaining humic and fulvic acids of ...
https://pubs.er.usgs.gov/publication/70162510
By use of the procedure humic acids have been prepared which have less than 0.22 percent ash. The isolation of relatively ash-free natural organic matter ...
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48 US-20170129820-A1 - Humic Acid Composition and ...
https://portal.unifiedpatents.com/patents/patent/US-20170129820-A1
A humic acid composition includes fulvic acid, ulmic acid and black humic acid. Fulvic acid is in an amount ranging from 64% to 98 wt % based on a sum ...
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49 When and How to Use Humic Acid Fertilizer to Improve Soil
https://morningchores.com/humic-acid/
Humic acid is often grouped together with fulvic acid and humin. These three substances make up what we call humic content, or humus, in reference to our garden ...
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50 Supramolecular structure of humic acids by TEM with ...
https://www.academia.edu/1319660/Supramolecular_structure_of_humic_acids_by_TEM_with_improved_sample_preparation_and_staining
MICROSCOPY RESEARCH AND TECHNIQUE 66:299–306 (2005) Supramolecular Structure of Humic Acids by TEM With Improved Sample Preparation and Staining MOHAMMED ...
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51 Production of Humic And Fulvic Acid From Low Grade Coals ...
https://www.adejournal.org/index.php/adej/article/download/4/2
Catalytic Oxidation Method with High Purity, High Extraction Efficiency. ... From oxidized coal samples, humic and fulvic acids were extracted.
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52 Determination of humic and fulvic acids in commercial solid ...
https://handle.nal.usda.gov/10113/58896
The methods used for preparation of HA and FA were adapted according to the guidelines of the International Humic Substances Society involving alkaline ...
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53 Humic Acid Liquid Formulation - Best quality PGR Product ...
https://bulkagrochem.com/product/humic-acid-liquid/
Soil Application: Apply 500 ml to 1 litre humic acid in one acre land with fertilizer through drip irrigation. Seed Treatment /Seed Dressing: Apply 100 ml of ...
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54 Preparation and Characterization of Chitosan-Humic Acid ...
https://www.hindawi.com/journals/jac/2016/1895854/
Humic acid was used for intramolecular cross-linking of the chitosan linear chains to increase the active sites on the chitosan biopolymer and ...
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55 A hydrothermal process to turn waste biomass into artificial ...
https://pure.mpg.de/rest/items/item_3069148/component/file_3249162/content
A novel preparation protocol for synthetic, look-a-like humic substances (i.e., fulvic and humic acids) simulating geochemical processes through hydrothermal ...
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56 How To Use Humic Acid In The Garden - ECOgardener
https://ecogardener.com/blogs/news/how-to-use-humic-acid-in-the-garden
This method lets you cover a wider expanse of space in half the time too! To use humic acid for foliar spray, dilute about a kilo of humic ...
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57 Humic Acid - Dr Earth
https://drearth.com/living-feed/the-technology/humic-acid/
What is humic acid? Humic acid is derived from leonardite shale and is among the most concentrated organic material available. Elemental analysis of humic ...
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58 humic acid extracted: Topics by WorldWideScience.org
https://worldwidescience.org/topicpages/h/humic+acid+extracted.html
A method for destroying humic acids prior to extraction was applied. The recoveries after the destruction of humic acids were in the range of 90%, even in the ...
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59 International standard ISO 19822 into Humintech's quality ...
https://www.humintech.com/agriculture/information/quality-control
In this method the humic and fulvic acid contents in the extracts are determined only indirectly by determining the organic carbon and subsequent conversion by ...
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60 Humic acids and Fulvic acids - ACIDOS HUMICOS
https://www.acidoshumicos.com/en/humic-acids-and-fulvic-acids/
Humic acids are obtained by extraction in a potassium hydroxide alkaline solution. They can also be extracted with sodium hydroxide, but while the contribution ...
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61 ORGANIC MATTER, HUMUS, HUMATE, HUMIC ACID ...
https://humates.com/wp-content/uploads/2020/04/ORGANICMATTERPettit.pdf
Man needs to reconsider his approach to fertilization techniques by giving higher priority to soil humus. The urgency to emphasize the importance of humic ...
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62 A simple technique for assessing the cuticular diffusion of ...
https://plantmethods.biomedcentral.com/articles/10.1186/s13007-019-0469-x
The proposed method involves the isolation of model plant leaf cuticles and the subsequent in vitro evaluation of cuticular humate transport.
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63 Critical Comparison of Humic Acid Test Methods - Coseva
https://www.coseva.com/wp-content/uploads/2021/06/CriticalComparisonofHumicAcidTestMethods.pdf
Agriculture (CDFA) method of evaluating the humic acid content of five raw ... polymers formed by secondary synthesis reactions (Stevenson 1982).
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64 The selection of optimal conditions for the process of obtaining ...
https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/34/e3sconf_ef18_02020.pdf
coal in order to determine the content of humic acid intended in particular ... solubility of brown coal in the prepared solutions was controlled UV-ViS.
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65 How to Use Soil Amendments - Humates, Humic Acids and ...
https://www.groworganic.com/blogs/articles/how-to-use-soil-amendments-humates-humic-acids-and-humus
Humates contain the same compounds and thus have the same benefits as applying liquid humic acids such as Humax. Once applied to the soil and ...
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66 The Effect of Sample Preparation on Humic Acid Removal ...
https://norgenbiotek.com/sites/default/files/resources/App-Note-46-Soil-DNA-Humic-Acid-Removal_0.pdf
MATERIALS AND METHODS. Peat DNA Purification. Total DNA was extracted from 250 mg of either high or regular humic acid level peat samples using the Soil DNA.
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67 Derivatization and structural studies by spectroscopic methods ...
https://fardapaper.ir/mohavaha/uploads/2020/07/Fardapaper-Derivatization-and-structural-studies-by-spectroscopic-methods-of-humic-acids-from-Leonardite.pdf
poor solubility of humic acids in organic solvents pratically prevents a ... The humic acid used was extracted in our laboratory, following the method.
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68 Separation and Quantification of Humic Acid and Fulvic Acid ...
https://mitrask.com/separation-and-quantification-of-humic-acid-and-fulvic-acid-using-column-chromatography/
In order to improve the separation methods, these mechanisms need to be investigated. The standard used has a declaration of containing min 60- ...
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69 Evaluation of the possibilities of using humic acids obtained ...
https://d-nb.info/1155523342/34
Materials and methods The humic acids were extracted from polish deposit of lignite–Sieniawa ... terial for the preparation of humic acids is the content of.
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70 Study of the Influence of Humic Acid Macromolecules on the ...
https://www.intechopen.com/chapters/66666
Isolation of humic acids . In this work, we used humic acids isolated from brown coal by two different techniques. The first one [28] includes the treatment of ...
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71 Their definition. Humic substances have attracted the attention ...
https://digital.csic.es/bitstream/10261/56164/1/Humic%20substances.%20Introduction.pdf
Both lignin and humic acids are partly soluble in alcohol and pyridine, depending also on the method of preparation; some lignin and some humus preparations are ...
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72 New Method for the Production of Barium Humate from ...
https://www.scirp.org/pdf/aces_2015063013265920.pdf
Insoluble humic acid was used as an adsorbent for cadmium and lead ions. Kříženecká et al. [7] prepared five metal humates (iron humate, ...
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73 Adsorption-based approach to determine the size and mass of ...
https://journals.sagepub.com/doi/10.1177/0263617415623421?icid=int.sj-full-text.similar-articles.3
The aqueous solutions were prepared with distilled water without addition of electrolyte. This was done to avoid the influence of the electrolytes on the humate ...
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74 Characterization of the coal derived humic acids from Mukah ...
https://www.scielo.br/j/jbchs/a/BPt3CkR8rLRhwbNB5c8WCkQ/?lang=en
The extraction with KOH at 0.5 mol L-1 produced humic acids with low ash content and high acidic functional groups, which are substantial as soil conditioner.
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75 Preparation of Humate Iron and Other Humate Metals - JSTOR
https://www.jstor.org/stable/40007859
humic acid prepared from glucose by this improved method and washed as free from ash as possible gave the composition ratio : C, 64.95 ; H, 3.85 ;.
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76 On the AcidrBase Properties of Humic Acid in Soil
https://e-tarjome.com/storage/panel/fileuploads/2019-01-28/1548672303_E11627-e-tarjome.pdf
Humic acid was isolated from three contrasting organic- rich soils and acidrbase titrations performed ... experiments, the humic acid preparation method was.
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77 Effects of different activation processes of humic ... - NASA/ADS
https://ui.adsabs.harvard.edu/abs/2019AIPC.2110b0021N/abstract
Extract Humic acid from lignite in different method get different Humic acid. In this study we preparation of Humic acid by alkali-soluble acid ...
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78 Effects of Urea, Humic Acid and Phosphate Interactions
https://andersonshumates.com/wp-content/uploads/2012/09/Effects-of-Urea-Humic-Acid-and-Phosphate-Interactions-on-Ammonia-Volitilization.pdf
available forms, NO, is more mobile than NH, thus making it more susceptible ... and total acidity of the humic acid were determined by the method described ...
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79 New methodology to assess the quantity and quality of humic ...
https://www.timacagro.com/app/uploads/sites/32/2017/11/5065-URT-18-Spain-FA.pdf
Purpose The traditional method to determine humic content. (humic and fulvic acids) in commercial fertilizers, biostimulants,.
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80 Simple and Rapid Method of Isolating Humic Acids from ...
https://thescipub.com/pdf/ajassp.2009.820.823.pdf
Approach: A 0.1 M KOH was used to isolate HA of air dry peat soil at 2, 4, 6, ... Key words: Humic acids isolation, tropical peat soils, humic substances, ...
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81 Humic acid - JTAFS
http://jtafs.mardi.gov.my/jtafs/37-2/Humic%20acid.pdf
Keywords: humic acid, coals and composts, extraction techniques, ... Sampling and sample preparation ... solution by a double acid digestion method.
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82 EP 0531866 A1 19930317 - Method of preparation of humic ...
https://data.epo.org/gpi/EP0531866A1
Method of preparation of humic acid/metal compounds, their use as adsorption and/or decontaminating agent as trace element source. Title (de). Verfahren zur ...
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83 Effects of the preparation method and humic-acid modification ...
https://agris.fao.org/agris-search/search.do?recordID=US201900450572
Effects of the preparation method and humic-acid modification on the mobility and contaminant-mobilizing capability of fullerene nanoparticles (nC₆₀) [2014].
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84 Determination of Extraction Period and Extractant Ratio for ...
https://www.agriculturejournal.org/volume6number2/determination-of-extraction-period-and-extractant-ratio-for-extracting-humic-acid-from-rice-straw-compost/
Humic acid yield was significantly lower when the extraction period was less than 12 hours because the time was not sufficient for the H+ ions ...
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85 Humic Acid Fertilizer Easily Add It For Your Best Plants, How ...
https://greener4life.com/blog/humic-acid-fertilizer
Humic acid gets created by the final breakdown of decaying plant and animal matter from microbial degradation. The organic acids get formed from the ...
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86 Humic acid fertilizer use method:ammonium humate,nitro HA,k ...
https://www.humicchina.com/blog/method-for-applying-solid-humic-acid.html
2. Application method of potassium humate · 1) Seed soaking. The concentration of soaking seeds with potassium humate (water soluble humic acid fertilizer) was ...
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87 Humic Acid Manufacturing Industry - Entrepreneur India
https://www.entrepreneurindia.co/project-and-profile-details/Humic%20Acid%20Manufacturing%20Industry
Humic Acid Manufacturing Industry. Production of Humic Acid Humic acid is any of a variety of organic acids obtained from organic constituents of soil ...
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88 articles / formulation and manufacturing process of humic acid
https://www.solverchem.com/articles/organic-fertilizers/formulation-and-manufacturing-process-of-humic-acid/details
Analysis of various forms of humates from different sources have been conducted. Results show that BioAg's material contains 12% bioactive fulvic acid based ore ...
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89 What is Humic Acid? [and How To Use It]
https://www.yourindoorherbs.com/what-is-humic-acid-how-to-use-it/
Humus breaks down further into 3 molecules which are collectively called humates. Humates are composed of humic acid, fulvic acid, and humin. At this stage, no ...
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90 Liquid Humic Acid Concentrate (extracted humate, functional ...
https://humicgrowth.com/product/liquid-humic-acid/
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91 humic acid | chemistry - Encyclopedia Britannica
https://www.britannica.com/science/humic-acid
humic acid, one of two classes of natural acidic organic polymer that can be extracted from humus found in soil, sediment, ...
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92 Biochar improved the composting quality of seaweeds and ...
https://www.frontiersin.org/articles/10.3389/fmicb.2022.1064252/full
The ratio of the optical density of humic acid at 460 nm to that at 660 nm (E4/E6) was analyzed by the spectrophotometry method.
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93 Leonardite: A mined source of humic acid Authors ... - RUcore
https://rucore.libraries.rutgers.edu/rutgers-lib/45991/PDF/1/play/
To extract humic and fulvic acid, the Leonardite is processed in a strongly basic ... plasma (ICP) method was used to analyze mineral content according to ...
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