Naslov
Electroanalytical characterization and determination of imidazole dipeptides carnosine and anserine

Autori
Jozanović, Marija ; Jakobović, Danijela ; Sakač, Nikola ; Sak-Bosnar, Milan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of International Scientific and Professional Conference 15th Ružička Days "Today Science - Tomorrow Industry / Šubarić, Drago ; Jukić, Ante - , 2014, 12-17

ISBN
978-953-7005-36-8

Skup
Proceedings of International Scientific and Professional Conference 15th Ružička Days "Today Science - Tomorrow Industry

Mjesto i datum
Vukovar, Hrvatska, 11.09.2014. - 12.09.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
dipeptides ; carnosine ; anserine ; potentiometry ; nonaqueous titrations.

Sažetak
Acid-base properties od imidazole dipeptides - carnosine and anserine were studied. Carnosine and anserine were determinated and characterized, single and in binary mixtures, by direct potentiometric titrations using aqueous and nonaqueous solvents. Before direct potentiometric titrations, carnosine and anserine solutions should be pH adjusted to 3.00. The generated potentiometric data were used for defining buffering capacities (buffer strength) and for determination of the corresponding species distribution diagrams. Distribution diagram provided the qualitative information of the carnosine and anserine species equilibria that are pH dependent. The buffer strength diagram of carnosine indicates enhanced buffer effect at pH ca. 3.5 and 7.5. Binary mixtures showed no or some small difference in potentiometric determination. Titration curve for titration in acetonitrile showed higher potential change compared to that in methanol solutions. Further investigation should be carried out.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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