Determination of OH groups by wet chemical methods

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60077344%3A_____%2F11%3A00371073" target="_blank" >RIV/60077344:_____/11:00371073 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/44555601:13520/11:43883546

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Determination of OH groups by wet chemical methods

Popis výsledku v původním jazyce

Functional groups of HS were determined by the methylation of HA with dimethylsulfate in both acetone and methanol. Observed differences in the determination of the OH group's content obtained by methylation with dimethylsulfate in acetone and methanol were interpreted on the basis of different polarity of the used solvents, which resulted in different alkalinity of reaction mixture. These results were compared and discussed with other structural information obtained by classical chemical methods and from titration curves. The contents of carboxylic, phenolic, and alcoholic groups as well as some other minor -OH groups were estimated from total OH contents obtained after methylation in both solvents in combination with the results of the conventional determinations of acidic functional groups as well as titration curves. Finally, on the basis of obtained results the brief characterization of analyzed HA samples regarding their functional OH groups was done.

Název v anglickém jazyce

Determination of OH groups by wet chemical methods

Popis výsledku anglicky

Functional groups of HS were determined by the methylation of HA with dimethylsulfate in both acetone and methanol. Observed differences in the determination of the OH group's content obtained by methylation with dimethylsulfate in acetone and methanol were interpreted on the basis of different polarity of the used solvents, which resulted in different alkalinity of reaction mixture. These results were compared and discussed with other structural information obtained by classical chemical methods and from titration curves. The contents of carboxylic, phenolic, and alcoholic groups as well as some other minor -OH groups were estimated from total OH contents obtained after methylation in both solvents in combination with the results of the conventional determinations of acidic functional groups as well as titration curves. Finally, on the basis of obtained results the brief characterization of analyzed HA samples regarding their functional OH groups was done.

Druh

C - Kapitola v odborné knize

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

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Humic Acids from Raw Materials of the Czech Republic

ISBN

978-1-61668-965-0

Počet stran výsledku

14

Strana od-do

47-60

Počet stran knihy

133

Název nakladatele

Nova Science Publisher

Místo vydání

New York

Kód UT WoS kapitoly

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