undergraduate thesis
Potentiometric characterisation of amylose and octadecyl – trimethyl ammonium bromide interaction

Doroteja Pavić (2014)
Sveučilište Josipa Jurja Strossmayera u Osijeku
Odjel za kemiju
Metadata
TitlePotenciometrijska karakterizacija interakcije amiloze i oktadecil – trimetil amonijevog bromida
AuthorDoroteja Pavić
Mentor(s)Nikola Sakač (thesis advisor)
Abstract
Tenzidi ili površinski aktivne tvari su bifunkcionalni organski spojevi koji se sastoje od hidrofilnog i hidrofobnog dijela. Koriste se u prehrambenoj (pekarski proizvodi), farmaceutskoj, kemijskoj i sličnim industrijama. Amiloza je esencijalni nerazgranati oblik škroba. Sastoji se od glukoznih jedinica povezanih α-1,4-glikozidnim vezama koji čine spiralno uvijeni lanac u obliku heliksa. Potenciometrijskom titracijom otopina amiloza (0; 0.1; 0.5; 1; 2 i 4%) s oktadecil-trimetil amonijevim bromidom (4 x 10-3 moldm-3) pratilo se stvaranje inkluzijskog kompleksa promjenom kritične micelarne koncentracije. Kompleks amiloze s OTAB nastaje tako da masni ugljikovodični lanac kationskog tenzida OTAB ulazi u heliks amiloze. Elektrode koje su se koristile tijekom eksperimenta bile su srebro/srebrov klorid (Metrohm) kao referentna elektroda i tenzidnoosjetljiva elektroda s plastificiranom PVC membranom vlastite izradbe.
Keywordsamylose octadecyl – trimethyl ammonium bromide surfactant potentiometric titration
Parallel title (English)Potentiometric characterisation of amylose and octadecyl – trimethyl ammonium bromide interaction
GranterSveučilište Josipa Jurja Strossmayera u Osijeku
Odjel za kemiju
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineNATURAL SCIENCES
Chemistry
Study programme typeuniversity
Study levelundergraduate
Study programmeChemistry
Academic title abbreviationuniv. bacc. chem.
Genreundergraduate thesis
Language Croatian
Defense date2014
Parallel abstract (English)
Tensides or surfactants are amphiphilic organic compounds that consist of both hydrophobic and hydrophilic parts. Tenzides are used in food industry (bakery), pharmaceutical industry, chemical industry, etc. Amylose is an essential unbranched form of starch. It is composed of glucose units which are linked with α-1,4- glucosidic bounds creating a spiral chain in shape of a helix. Potentiometric titration of amylose (0; 0.1; 0.5; 1; 2 and 4%) with octadecyl-trimethyl ammonium bromide (4 x 10-3 moldm-3) was followed by the formation of inclusion complex by changing the critical micellar concentration. In amylose OTAB complex formation mechanism fatty hydrocarbon chain cationic surfactants OTAB enters the amylose helix. The electrodes that were used during the experiment were silver/silver chloride (Metrohm) as the reference electrode and surfactant-sensitive electrodes with plasticized PVC membrane.
Parallel keywords (Croatian)amiloza oktadecil-trimetil amonijev bromid površinski aktivne tvari potenciometrijska titracija
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:182:751649
CommitterSanda Hasenay