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undergraduate thesis
Potenciometrijska studija sustava škrob-trijodid
2011. urn:nbn:hr:182:343072
Radanović, Tatjana
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Department of Analytical, Organic and Applied Chemistry

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Radanović, T. (2011). Potenciometrijska studija sustava škrob-trijodid (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:343072

Radanović, Tatjana. "Potenciometrijska studija sustava škrob-trijodid." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2011. https://urn.nsk.hr/urn:nbn:hr:182:343072

Radanović, Tatjana. "Potenciometrijska studija sustava škrob-trijodid." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2011. https://urn.nsk.hr/urn:nbn:hr:182:343072

Radanović, T. (2011). 'Potenciometrijska studija sustava škrob-trijodid', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 10 December 2024, https://urn.nsk.hr/urn:nbn:hr:182:343072

Radanović T. Potenciometrijska studija sustava škrob-trijodid [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2011 [cited 2024 December 10] Available at: https://urn.nsk.hr/urn:nbn:hr:182:343072

T. Radanović, "Potenciometrijska studija sustava škrob-trijodid", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2011. Available at: https://urn.nsk.hr/urn:nbn:hr:182:343072

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Metadata
TitlePotenciometrijska studija sustava škrob-trijodid
Title (english)Potenciometric study of starch-triiodide system
AuthorTatjana Radanović
MentorMilan Sak-Bosnar (mentor)
MentorNikola Sakač (komentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
(Department of Analytical, Organic and Applied Chemistry)
Osijek
Defense date and country2011-10, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Analytic Chemistry
Abstract
Škrob je ugljikohidrat koji se sastoji od dva polimera: amiloze i amilopektina. Amiloza stvara stabilne komplekse sa trijodidnim ionom, dok amilopektin stvara vrlo slabe komplekse. Prilikom nastanka škrob-trijodid kompleksa otopina se oboji u tamno plavo, tako da može služiti kao indikator. Udio amiloze i/li amilopektina varira ovisno o vrsti škroba. Pratio se odziv platinske redoks elektrode na različite vrste i sorte škrobova pri različitim masama dodanog škroba. Uporabom direktne potenciometrije mjeri se ovisnost elektrodnog potencijala o količini dodane otopine škroba u otopinu kalijevog trijodida. Mjereni su uzorci škrobova različitog botaničkog podrijetla. Grafičkim prikazom rezultata utvrđeno je da postoji razlika u odgovoru platinske redoks elektrode s obzirom na vrstu korištenog škroba. Razlike se odnose na izgled grafa, odnosno na razlike u promjeni potencijala do stvaranja maksimalne koncentracije kompleksa škrob-trijodid te na nagib odgovora redoks elektrode s povećanjem koncentracije dodanog škroba.
Abstract (english)
Starch is carbohydrate and a mixture of two polimers: amylose and amylopectin. Amylose creates strong complexes with triiodide, but amylopectin doesn't. Starch-triiodine complex causes dark blue coloration and it can be used as an indicator. Amount of amylose and/or amylopectin is different in different types of starch. We were watching response of a platinum redox electrode on diferrent species and varieties of starches using different masses of starch and concentration of triiodide. We were measuring, using direct potentiometry, how electrode potential depends of a amount of starch solution added to a solution of potassium triiodide. Samples of starch had different botanical origin. Graphical presentation of results showe that there is a difference in the response to a platinum redox electrode considering the type of starch. The differences related to the appearance of the graph, the difference in changing the potential to create the maximum concentration of the complex starch-triiodide and the slope response of the redox electrode with increasing concentrations of added starch.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:343072
Study programmeTitle: Chemistry
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2017-02-21 09:48:52