Determination of OH groups by wet chemical methods

Result code in 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>
Alternative codes found
RIV/44555601:13520/11:43883546
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Determination of OH groups by wet chemical methods
Original language description
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.
Czech name
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Czech description
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Project
<a href="/en/project/1M0554" target="_blank" >1M0554: Advanced Remedial Technologies and Processes</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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