master's thesis
Influence of a Different Plasticizer on the Surfactant Electrode Properties

Martina Kopriva (2015)
Josip Juraj Strossmayer University of Osijek
Department of Chemistry
Metadata
TitleUtjecaj različitih plastifikatora na karakteristike tenzidne elektrode
AuthorMartina Kopriva
Mentor(s)Nikola Sakač (thesis advisor)
Abstract
Izrađene su membrane za ionsko-selektivne elektrode koje sadrže plastifikatore orto-nitrofenil-oktil eter (o-NPOE), dioktil ftalat (DOP), dioktil sebakat (DOS), 2-nitrofenil-fenil eter (NPPE), dibutil ftalat (DBP) i dibutil sebakat (DBS). Nakon sastavljanja elektroda ispitane su njihove odzivne karakteristike na kationske tenzide: cetilpiridinijev klorid monohidrat (CPC), heksadeciltrimetilamonijev bromid (CTAB), benzetonijev klorid (Hyamine 1622) i 1,3-didecil-2-metilimidazolijev klorid (DMIC). Osim odzivnih karakteristika na kationske tenzide ispitane su i odzivne karakteristike na anionske tenzide: natrijev dodecilsulfat (SDS) i natrijev dodecilbenzensulfonat (SDBS). Otopine kationskih i anionskih tenzida bile su u rasponu koncentracija od 4·10-2 do 4·10-4 mol dm-3. Odzivne karakteristike ispitivane su u destiliranoj vodi pri sobnoj temperaturi i bez promjene pH vrijednosti. Ionsko-selektivne elektrode čije membrane sadrže različite plastifikatore pokazale su različite odzivne karakteristike. Za istu vrstu tenzida elektrode su pokazale različitu selektivnost, granice detekcije i mjerno područje. Najbolje odzivne karakteristike, za sve vrste ispitivanih plastifikatora, pokazala je otopina kationskog tenzida Hyamine 1622. Odstupanje postoji jedino kod membrane koja sadrži DBS. Odzivi te membrane na otopine Hyamine 1622, CPC i CTAB nisu pogodni za daljnja istraživanja, a i sama membrana je mehanički nestabilna i kratkog vijeka trajanja. Ipak, s otopinom DMIC, te otopinama oba anionska tenzida ta membrana je pokazala zadovoljavajuće odzivne karakteristike. Rezultati istraživanja su pokazali da sastav membrane izravno utječe na njena senzorska svojstva za određivanje anionskih i kationskih tenzida. Metodički dio rada sadrži pripremu za nastavnu jedinicu pod naslovom Sapuni i detergenti. Nastavni sat je zamišljen kao kombinacija frontalnog i grupnog rada. Učenike je potrebno upoznati sa građom sapuna i detergenata te navesti njihova svojstva koja se ujedno dokazuju izvođenjem pokusa. Nakon izvođenja pokusa učenici popunjavaju radne listiće, a na kraju sata ponavlja se obrađeno gradivo.
Keywordspotentiometry ion-selective electrodes plasticizer cationic surfactants anionic surfactants response characteristics of the electrodes
Parallel title (English)Influence of a Different Plasticizer on the Surfactant Electrode Properties
Committee MembersMilan Sak-Bosnar (committee chairperson)
Nikola Sakač (committee member)
Ivan Vicković (committee member)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
PlaceOsijek
StateCroatia
Scientific field, discipline, subdisciplineNATURAL SCIENCES
Chemistry
Study programme typeuniversity
Study levelgraduate
Study programmeChemistry
Academic title abbreviationmag.educ.chem.
Genremaster's thesis
Language Croatian
Defense date2015-07-08
Parallel abstract (English)
How to prepare membranes for ion-selective electrodes which contain plasticizers ortho-nitrophenyl octylether (o-NPOE), dioctylphthalate (DOP), dioctylsebacate (DOS), 2-nitrophenyl phenylether (NPPE), dibutylphthalate (DBP) and dibutylsebacate (DBS) has been shown in the thesis. The relevant electrode response characteristics to the cationic surfactant such as cetylpyridinium chloride monohydrate (CPC), hexadecyltrimethylammonium bromide (CTAB), benzethonium chloride (Hyamine 1622) and 1,3 -didecyl-2- methylimidazolium chloride (DMIC) are tested. The response characteristics to the anionic surfactant such as sodiumdodecyl sulfate (SDS) and sodium dodecylbenzenesulfonate (SDBS) were examined as well. The concentration range from 4·10-2 to 4·10-4 mol dm-3 was kept for both cationic and anionic surfactant solutions. The response characteristics were tested in destilled water at room temperature at constant pH. It has been obvious that ion-selective electrode response characteristics depend on applied membrane plasticizers. The electrodes showed different selectivity, limits of detection and the measurement range by using the same type of surfactant. The solution of the cationic surfactant Hyamine1622 has evinced the best response characteristics comparing to the all types of tested plasticizers. A deviation exists only in the membrane which contains the DBS. The response of this membrane in solution of Hyamine1622, CPC and CTAB is not suitable for further studies, and more over, the membrane is quite unstable and has short lifetime. However, in the DMIC solution and in the solutions of both anionic surfactants this membrane has showed satisfying response characteristics. The results revealed that the composition of a membrane directly affects its sensory properties of determination of anionic and cationic surfactants. In accordance with teacher preparation requirements, a unit plan for lecture called Soaps and detergents has been prepared. Lesson is designed as a combination of frontal and group work. The disciples have to meet the structure of soap and detergents, and specify their properties, which is also prove by performing experiments. After performing the experiment the disciples are expected to fill out worksheets and at the end of the lecture repeat the processed material.
Parallel keywords (Croatian)potenciometrija ionsko-selektivne elektrode plastifikator kationski tenzidi anionski tenzidi odzivne karakteristike elektrode
Resource typetext
Access conditionOpen access
Terms of usehttp://rightsstatements.org/vocab/InC/1.0/
URN:NBNhttps://urn.nsk.hr/urn:nbn:hr:182:918732
CommitterSanda Hasenay