About: Utilization of In-electrode Coulometric Titration in Humic Research

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In this work, the in-electrode coulomeric titration is used for analysis of humic acids in aqueous solutions. The method is based on the galvanostatical reduction of splitting off hydrogen ions at a suitable potential. The method was valited using simple organic acids (acetic acid, benzoic acid, citric acid, oxalic acid, phthalic acid and salicylic acid). It was found that efficiency of the method depends on acid concentration and strength. The limits are concentration of 20 mmol.dm-3 and pKa 5. Humic acids are analysed as extract in solution of sodium sulfate (1,5 % wt.). The efficiency of galvanostatic reduction depended on concentration of humic acids as in previous case. The limit obtained for used sample was 20 g of humic acids per litre. It is well-known that humic acids are soluble in neutral aqueous solutions only partially1. Their carboxylic groups have various strength which influences their solubility and activity in natural systems. Humic fractions rich with carboxylic groups are much m In this work, the in-electrode coulomeric titration is used for analysis of humic acids in aqueous solutions. The method is based on the galvanostatical reduction of splitting off hydrogen ions at a suitable potential. The method was valited using simple organic acids (acetic acid, benzoic acid, citric acid, oxalic acid, phthalic acid and salicylic acid). It was found that efficiency of the method depends on acid concentration and strength. The limits are concentration of 20 mmol.dm-3 and pKa 5. Humic acids are analysed as extract in solution of sodium sulfate (1,5 % wt.). The efficiency of galvanostatic reduction depended on concentration of humic acids as in previous case. The limit obtained for used sample was 20 g of humic acids per litre. It is well-known that humic acids are soluble in neutral aqueous solutions only partially1. Their carboxylic groups have various strength which influences their solubility and activity in natural systems. Humic fractions rich with carboxylic groups are much m (en)
Title	Utilization of In-electrode Coulometric Titration in Humic Research Utilization of In-electrode Coulometric Titration in Humic Research (en)
skos:prefLabel	Utilization of In-electrode Coulometric Titration in Humic Research Utilization of In-electrode Coulometric Titration in Humic Research (en)
skos:notation	RIV/00216305:26310/11:PU94240!RIV15-MSM-26310___
http://linked.open...avai/riv/aktivita	O P
http://linked.open...avai/riv/aktivity	O, P(ED0012/01/01)
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Klučáková, Martina
http://linked.open.../riv/druhVysledku	O - Ostatní výsledky nezařaditelné do žádného z výše uvedených druhů výsledku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoké učení technické v Brně / Fakulta chemická
http://linked.open...dnocenehoVysledku	237560
http://linked.open...ai/riv/idVysledku	RIV/00216305:26310/11:PU94240
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	humic acids, acidity, coulometry (en)
http://linked.open.../riv/klicoveSlovo	acidity coulometry humic acids
http://linked.open...ontrolniKodProRIV	[16E057A6398B]
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	3 (xsd:int)
http://linked.open...vavai/riv/projekt	Centres for materials research at FCH BUT
http://linked.open...UplatneniVysledku	2011
http://linked.open...iv/tvurceVysledku	Klučáková, Martina
http://localhost/t...ganizacniJednotka	26310

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