Acidobazické titrační křivky pevných huminových kyselin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13520%2F08%3A00003760" target="_blank" >RIV/44555601:13520/08:00003760 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Acid-base titration curves of solid humic acids

Popis výsledku v původním jazyce

A direct discontinuous titration method with NaOH was developed to characterize the acid-base properties of complex natural polyelectrolytes, such as humic substances (HS). The classical batch procedure, suggested originally for examinations of resin-based ion exchanger, was modified to be applicable to HS; the modified method is suitable especially for the measurements of the titration curves of solid humic acids (HA). The titration data provide a valuable information on the nature and distribution ofacidic functional groups in the HA molecules. The contents of carboxylic and phenolic groups in the HS molecules were calculated from the raw titration data and compared with the results obtained by the barium hydroxide and calcium acetate exchange methods. A good agreement was found for the contents of carboxylic groups, but not for the contents of phenolic groups. An uncertainty of the determination of acidic functional groups was estimated from the series of duplicate analyses of real

Název v anglickém jazyce

Acid-base titration curves of solid humic acids

Popis výsledku anglicky

A direct discontinuous titration method with NaOH was developed to characterize the acid-base properties of complex natural polyelectrolytes, such as humic substances (HS). The classical batch procedure, suggested originally for examinations of resin-based ion exchanger, was modified to be applicable to HS; the modified method is suitable especially for the measurements of the titration curves of solid humic acids (HA). The titration data provide a valuable information on the nature and distribution ofacidic functional groups in the HA molecules. The contents of carboxylic and phenolic groups in the HS molecules were calculated from the raw titration data and compared with the results obtained by the barium hydroxide and calcium acetate exchange methods. A good agreement was found for the contents of carboxylic groups, but not for the contents of phenolic groups. An uncertainty of the determination of acidic functional groups was estimated from the series of duplicate analyses of real

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

<a href="/cs/project/1M0554" target="_blank" >1M0554: Pokročilé sanační technologie a procesy</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2008

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Reactive and functional polymers

ISSN

1381-5148

e-ISSN

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Svazek periodika

68

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

6

Strana od-do

242-247

Kód UT WoS článku

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EID výsledku v databázi Scopus

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