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Statements

Subject Item
n2:RIV%2F61989100%3A27360%2F04%3A00010197%21RIV%2F2005%2FGA0%2F273605%2FN
rdf:type
n19:Vysledek skos:Concept
dcterms:description
In this work, a method of capillary isotachophoresis (ITP) for the study of cetyltrimethylammonium bromide (CTMB) sorption on various clays1 was developed. CTMB represents cationic surfactants that have detrimental effects to aquatic organisms and must be removed from water environment2. The used leading electrolytes (LE) consisted of 5 mM potassium hydrogen carbonate and acetic acid (pH=4.5). The terminating electrolytes (TE) contained 5 mM ß-alanine and acetic acid (pH=4.0). The concentrations of CTMB in used aqueous solutions were bellow its critical micelle concentration, i.e., ca. 0.7 mM.Adsorption of CTMB to the ITP separation compartment was prevented by non-ionic polymers, such as hydroxyethylcellulose (HEC), polyvinylalcohol (PVA), and polyvinylpyrrolidone (PVP), which were dissolved in LE. They decrease the ?-potentials of the capillary walls3. When using HEC, the zones of CTMB monomers and also micelles were recorded as a result of the ITP concentration effect4. However, in the case of PVA In this work, a method of capillary isotachophoresis (ITP) for the study of cetyltrimethylammonium bromide (CTMB) sorption on various clays1 was developed. CTMB represents cationic surfactants that have detrimental effects to aquatic organisms and must be removed from water environment2. The used leading electrolytes (LE) consisted of 5 mM potassium hydrogen carbonate and acetic acid (pH=4.5). The terminating electrolytes (TE) contained 5 mM ß-alanine and acetic acid (pH=4.0). The concentrations of CTMB in used aqueous solutions were bellow its critical micelle concentration, i.e., ca. 0.7 mM.Adsorption of CTMB to the ITP separation compartment was prevented by non-ionic polymers, such as hydroxyethylcellulose (HEC), polyvinylalcohol (PVA), and polyvinylpyrrolidone (PVP), which were dissolved in LE. They decrease the ?-potentials of the capillary walls3. When using HEC, the zones of CTMB monomers and also micelles were recorded as a result of the ITP concentration effect4. However, in the case of PVA Stanovení cetyltrimethylammonium bromidu kapilární izotachoforézou
dcterms:title
Determination of cetyltrimethylammonium bromide by capillary isotachophoresis Determination of cetyltrimethylammonium bromide by capillary isotachophoresis Stanovení cetyltrimethylammonium bromidu kapilární izotachoforézou
skos:prefLabel
Stanovení cetyltrimethylammonium bromidu kapilární izotachoforézou Determination of cetyltrimethylammonium bromide by capillary isotachophoresis Determination of cetyltrimethylammonium bromide by capillary isotachophoresis
skos:notation
RIV/61989100:27360/04:00010197!RIV/2005/GA0/273605/N
n3:strany
604
n3:aktivita
n4:P
n3:aktivity
P(GA104/02/1464)
n3:dodaniDat
n16:2005
n3:domaciTvurceVysledku
n10:8145652
n3:druhVysledku
n18:D
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
560058
n3:idVysledku
RIV/61989100:27360/04:00010197
n3:jazykVysledku
n17:eng
n3:klicovaSlova
cetyltrimethylammonium bromide;capillary isotachophoresis
n3:klicoveSlovo
n20:capillary%20isotachophoresis n20:cetyltrimethylammonium%20bromide
n3:kontrolniKodProRIV
[F0A00502BD92]
n3:mistoKonaniAkce
Ostrava
n3:mistoVydani
Praha
n3:nazevZdroje
Chemické listy
n3:obor
n11:DD
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
1
n3:projekt
n6:GA104%2F02%2F1464
n3:rokUplatneniVysledku
n16:2004
n3:tvurceVysledku
Praus, Petr
n3:typAkce
n13:EUR
n3:zahajeniAkce
2004-09-06+02:00
s:issn
0009-2770
s:numberOfPages
1
n8:hasPublisher
Česká společnost chemická (ČSCH), VŠCHT Praha a ČZU Praha
n14:organizacniJednotka
27360