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Titolo:
Determination of association constants of inorganic ions with C-12- and C-14-alkyldimethylammoniopropane sulfonate zwitterionic surfactants using capillary electrochromatography
Autore:
Yokoyama, T; Macka, M; Haddad, PR;
Indirizzi:
Univ Tasmania, Australian Ctr Res Separat Sci, Sch Chem, Hobart, Tas 7001,Australia Univ Tasmania Hobart Tas Australia 7001 Chem, Hobart, Tas 7001,Australia
Titolo Testata:
ANALYTICA CHIMICA ACTA
fascicolo: 2, volume: 442, anno: 2001,
pagine: 221 - 230
SICI:
0003-2670(20010905)442:2<221:DOACOI>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
VARYING CARBON NUMBER; AQUEOUS-SOLUTIONS; INTERCHARGE GROUP; ZONE-ELECTROPHORESIS; SEPARATION; MICELLES; CHROMATOGRAPHY; ANIONS; PHASE; SELECTIVITY;
Keywords:
zwitterionic surfactant; association constant; inorganic anions and cations; micelles; capillary electrochromatography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Haddad, PR Univ Tasmania, Australian Ctr Res Separat Sci, Sch Chem, GPO Box 252-75, Hobart, Tas 7001, Australia Univ Tasmania GPO Box 252-75 Hobart Tas Australia 7001 ustralia
Citazione:
T. Yokoyama et al., "Determination of association constants of inorganic ions with C-12- and C-14-alkyldimethylammoniopropane sulfonate zwitterionic surfactants using capillary electrochromatography", ANALYT CHIM, 442(2), 2001, pp. 221-230

Abstract

Association constants (K-ass) of 10 inorganic anions (chloride, bromide, iodide, nitrite, nitrate, chlorate, thiocyanate, iodate, perchlorate, and molybdate) and seven inorganic cations (lithium, sodium, potassium, rubidium,caesium, magnesium, and cerium(III)) with micelles of two zwitterionic surfactants 3-(N,N-dimethyldodecylammonio)propane sulfonate (C12N3S) and 3-(N,N-dimethylmyristylammonio)propane sulfonate (C14N3S) were determined using capillary electrochromatography (CEC). These K-ass values of anions with C12N3S increased as follows: Cl- (4.2 +/-0.1) < IO3- (4.6 +/-0.1) < Br- (5.9<plus/minus>0.1) < NO2- (6.2 +/- 0.1) < MoO42- (7.8 +/- 0.1) < NO3- (14 +/- 1) < ClO3- (26 +/- 1) < I- (68 <plus/minus> 7) < SCN- (310 <plus/minus> 30)< ClO4- (800 +/- 200) dm(3) mol(-1). Similar K-ass values were obtained for C14N3S micelles, but K-ass values of these anions with a non-ionic surfactant and with a non-surfactant-type zwitterion (used for comparative purposes) were small. The Kris values of cations with the C12N3S micelle in 10 mMimidazole-20 mM 2-morpholinoethanesulfonic acid (MES) buffer of pH 6.2 increased as follows: Rb+ (1.4 +/- 0.1) = Cs+ (1.4 +/- 0.1) = K+ (1.4 +/- 0.1)< Na+ (3.2 <plus/minus> 0.1) < Li+ (4.5 <plus/minus> 0.1) < Mg2+ (7.8 <plus/minus> 0.1) < Ce3+ (12 <plus/minus> 1) dm(3) mol(-1). The fact that the K-ass values for polarisable anions, such as iodide and thiocyanate, were larger than those of cations of +2 and +3 charge, agrees well with the relative retentions for those ions in electrostatic ion chromatography (EIC). (C)2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 15/07/20 alle ore 07:57:27