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Title:Vpliv ionov Hofmeisterjeve vrste na premik kritične micelne koncentracije površinsko aktivnih snovi (ionskega tipa) : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:Mlinarič, Vanja (Author)
Fuchs-Godec, Regina (Mentor) More about this mentor... New window
Bren, Urban (Co-mentor)
Files:.pdf UN_Mlinaric_Vanja_2019.pdf (1,88 MB)
MD5: E5F5AF9F2DD88EB4B0A3C9D78B20E8D9
 
Language:Slovenian
Work type:Bachelor thesis/paper (mb11)
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen diplomskega dela je ovrednotiti premik kritične micelne koncentracije (CMC) površinsko aktivne snovi, natrijevega dodecil sulfata (SDS) ob dodatku različnih anionov, ki sestavljajo t.i. Hofmeisterjevo vrsto. Meritve smo izvedli pri dveh temperaturah; 293,15 K in 303,15 K. Za pripravo raztopin smo uporabili ultra čisto vodo (Mili-Q). Koncentracija dodanih anionov je bila 1 mM in 10 mM. V ta namen smo izbrali NaCl, NaNO3, Na2CO3, Na2SO4 in KSCN. Določanje CMC je temeljilo na merjenju specifične prevodnosti raztopin v odvisnosti od koncentracije. Vrednosti specifične prevodnosti se ob prehodu iz premicelarnega področja v micelarno področje spremenijo tako, da lahko na podlagi presečišča dveh premic z različnima naklonoma grafično določimo CMC. Vrednosti CMC raztopin ob dodatku ionov iz Hofmeisterjeve vrste so v skladu z njihovo lego v Hofmeisterjevi vrsti.
Keywords:površinsko aktivne snovi, kritična micelna koncentracija (CMC), natrijev dodecil sulfat (SDS), specifična prevodnost, Hofmeisterjeva vrsta
Year of publishing:2019
Place of performance:Maribor
Publisher:[V. Mlinarič]
Number of pages:VIII, 29 str.
Source:Maribor
UDC:544.77.051.62:543.395(043.2)
COBISS_ID:22283286 New window
NUK URN:URN:SI:UM:DK:O3IPAURU
Views:561
Downloads:70
Metadata:XML RDF-CHPDL DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:19.03.2019

Secondary language

Language:English
Title:Influence of the Hofmeister series on the shift of the critical micelle concentration surfactants (an ionic type)
Abstract:The purpose of the present graduation thesis is to evaluate the shift of the critical micelle concentration (CMC) of a surface active substance, sodium dodecyl sulphate (SDS), with addition of various anions, which constitute the so-called Hofmeister series. Measurements were conducted at two temperatures; 293,15 K and 202,15 K. Ultrapure water (Mili-Q) was used for the preparation of solutions. Concentrations of added anions were 1 mM and 10 mM. For this purpose, NaCl, NaNO3, Na2CO3, Na2SO4 and KSCN were chosen. Measurement of specific conductivity in dependence on solution concentration was the basis for the determination of CMC. Values of the specific conductivity change at the transition from premicellar sphere into micelle sphere in such a way that CMC can be determined graphically on the basis of the intersection of two lines with different inclines. Values of CMC solutions with addition of ions from Hofmeister series are in accordance with their position in the Hofmeister series.
Keywords:surface active substances, critical micelle concentration (CMC), sodium dodecyl sulfate (SDS), specific conductivity, Hofmeister series


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