undergraduate thesis
Determination of surfactant concentration in mouthnasm liquids

Mateja Drulak (2015)
Sveučilište Josipa Jurja Strossmayera u Osijeku
Odjel za kemiju
Zavod za analitičku, organsku i primijenjenu kemiju
Metadata
TitleOdređivanje koncentracije tenzida u tekućinama za ispiranje usta
AuthorMateja Drulak
Mentor(s)Nikola Sakač (thesis advisor)
Abstract
U ovom radu govori se o određivanju koncentracije tenzida u tekućinama za ispiranje usta. Tenzidi su organske tvari koje karakterizira hidrofoban i hidrofilan dio molekule. One su sastavni dio brojnih sredstva za čišćenje, ali i sredstva za osobnu higijenu. Postoje četiri vrste površinski aktivnih tvari (kationske, anionske, neionske i amfolitske), a u sastavu ispitanih tekućina za ispiranje usta nalaze se kationski i amfolitski tenzidi. Ispitivane vodice za ispiranje usta u svom sastavu imaju amfolitski tenzid kokamidopropil betain (CAPB) ili kationski tenzid cetilpiridinijev klorid (CPC). Sva mjerenja vršena su direktnom potenciometrijom preko uređaja Metrohm i programa Tiamo. Analizirana su četiri uzorka vodica za ispiranje usta (MW1, MW2, MW3 i MW5). Uz titracije čistih uzoraka, napravljene su i titracije sa standardnim dodatkom (CPC). Koncentracija tenzida u uzorku MW1 iznosi 3,3428·10-3 moldm-3, u uzorku MW2 3,81416·10-3 moldm-3, u uzorku MW3 1,4041·10-3 moldm-3 i u uzorku MW5 5,5593·10-3 moldm-3. Točka ekvivalencije određena je instrumentalno. Koncentracije su određene računski na temelju dobivenih podataka. Rezultati su prikazani grafički u ovisnosti elektromotorne sile o volumenu utrošenog titranta (SDS).
Keywordssurfactant direct potentiometry mouthwash liquids cetylpyridinium chloride cocamidopropyl betaine
Parallel title (English)Determination of surfactant concentration in mouthnasm liquids
GranterSveučilište Josipa Jurja Strossmayera u Osijeku
Odjel za kemiju
Lower level organizational unitsZavod za analitičku, organsku i primijenjenu 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 date2015-09-30
Parallel abstract (English)
This paper deals with the determination of surfactants concentration in mouthwash liquids. Surfactants are organic matters which contain hydrophobic and hydrophilic part of molecule. They are main component in many cleaning personal hygiene products. There are four types of surfactants (cationic, anionic, nonionic and amphoteric), but only cationic and amphoteric surfactants are part of analyzed mouthwash liquids. Analyzed mouthwash liquids have amphoteric surfactant cocamidopropyl betaine (CAPB) or cationic surfactants cetylpyridinium chloride (CPC). All measurments were conducted by direct potentiometry with device Metrohm and softwere Tiamo. There were four samples of mouthwash liquids that were analyzed (MW1, MW2, MW3 and MW5). With titration of pure samples, there were also titration with known addition (CPC). The concetration of surfactant in sample MW1 is 3,3428·10-3 moldm-3, in sample MW2 3,81416·10-3 moldm-3, in sample MW3 1,4041·10-3 moldm-3 and in sample MW5 5,5593·10-3 moldm-3. Equivalent point was determined instrumentally. Concetrations are determined by obtained results. Results are presented by graphical representation of dependency electromotive force of spent titrant volume (SDS).
Parallel keywords (Croatian)tenzid direktna potenciometrija tekućine za ispiranje usta cetilpiridinijev klorid kokamidopropil betain
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:182:707502
CommitterSanda Hasenay